JP3837201B2 - Flash memory CPU type control device and device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a CPU type controller capable of preventing the rewrite accident of a flash memory and the utilization device. SOLUTION: The heat source machine 10, indoor machine 20 and operation device 30 of a distributed arrangement type air conditioning device 100 respectively constitute this flash memory CPU type controller for performing control by the flash memory 72A for processings/data and a CPU 70. Communication signals and an erasure/rewrite voltage Vp2 are supplied from an external rewrite device 200 to the required one of the heat source machine 10, the indoor machine 20 and the operation device 30, a voltage switching device 85 is operated, the operation voltage of the processing/data flash memory 72A is switched to the erasure/rewrite voltage Vp2, then rewrite data are transmitted and a rewrite operation is performed. Since the erasure/rewrite voltage Vp2 is supplied from the external rewrite device 200 only at the time of the rewrite operation, erroneous rewrite by communication abnormality such as erroneous communication or the like is prevented. The need of rewrite is confirmed by confirming the version No. of storage contents, and after the rewrite, the normality/abnormality of the rewrite are discriminated by the storage address total value of the flash memory 72A.

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a control device having a control unit storing a control processing program or the like in a flash memory, and a device using the same, for example, a distributed arrangement type air conditioner.
[0002]
[Prior art]
The basic components of the air conditioner in which each device is arranged as a distributed enemy, that is, the distributed arrangement type air conditioner 100, are summarized. As shown in FIG. A heat source supply system that gives a heat source from the heat source unit 10 to the indoor unit 20 to cool or warm the air in the air-conditioning target room 84, and an operating condition of cooling or heating from the operating unit 30 arranged in the air-conditioning target room 84 The air conditioner control system configured to control the air conditioner operation by setting it in the indoor unit 20 is mainly configured, and the central monitoring control panel 50 monitors and controls only necessary ones of the air conditioner operations as necessary. It has a configuration with a control system added.
[0003]
And in a small-scale thing, the group composition which made one set the thing which combined one unit or a plurality of indoor units 20 with respect to one heat source machine 10 is made into a basic composition, and in a large-scale thing, the above-mentioned The basic configuration is configured by arranging a plurality of sets as shown in FIG. In the present invention, “cooling / heating” includes three cases: a case where only cooling is performed, a case where only heating is performed, and a case where cooling and heating are selectively performed.
[0004]
As a heat source for air conditioning and heating, that is, a heat source for air conditioning, one using a compression refrigeration cycle, one using an absorption refrigeration cycle, and the like are used. A configuration in which a heat source is obtained by a compressed thermal operation fluid is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-146987.
[0005]
In FIG. 14, a circuit portion by a pipe 83 shown by a double line is a pipe for supplying / managing a heat operation fluid for obtaining a heat source, for example, a refrigerant fluid, and a circuit portion shown by a thin line is an electric line. The heat source device 10 is generally referred to as an outdoor unit because it is disposed outdoors, but may be disposed indoors.
[0006]
Then, the compression unit 11 of the heat source device 10 drives a rotary compressor with a driving source such as a gas engine or an electric motor, for example, to obtain a heat operation fluid for obtaining a heat source, for example, refrigerants such as Freon R22 and Freon R137. This is a portion to be pressurized, and heat applied at a low pressure after finishing the required thermal operation by applying the pressurized thermal operation fluid to a pipe line passing through the heat exchanger 12 of the heat source unit 10 and the heat exchanger 21 of the indoor unit 20. The operating fluid is circulated so as to return to the compression unit 11 and pressurize it again.
[0007]
When the indoor unit 20 performs the cooling operation, the flow path switching unit 13 of the heat source unit 10 connects the heat exchanger 21 on the indoor unit 20 side so as to operate as a heat exchanger for heat absorption, and the heat source unit When the pipes are connected so that the heat exchanger 12 on the 10 side operates as a heat exchanger for heat dissipation, and when the indoor unit 20 performs a heating operation, the heat exchanger 12 on the heat source apparatus 10 side is connected. It is a part which connects each pipe line so that it may operate as a heat exchanger for heat absorption, and heat exchanger 21 by the side of indoor unit 20 operates as a heat exchanger for heat dissipation, for example, a four-way valve etc. This is a flow path switching mechanism that electrically operates the switching valve.
[0008]
Further, when the heat source is constituted by an absorption refrigeration cycle, for example, the compression unit 11, the heat exchanger 12, and the flow path switching unit 13 are replaced with a first heat operation fluid, for example, a mixture of ammonia and water. The absorber is changed to an absorber / regenerator / condenser / evaporator, etc., for circulating and operating the absorption liquid by the heat, and a second thermal operation fluid, for example, water is connected to a pipe line passing through the inside of the evaporator. Is used to obtain cold water or hot water, and the second heat operation fluid is supplied to the heat exchanger 21 of the indoor unit 20.
[0009]
Then, the control unit 703 of the operating device 30 includes a data signal related to an operating condition such as a data signal of the indoor temperature value D1A detected by the temperature detector D1, a cooling or heating target temperature value TA set and input by the setting operation unit 75, Command signals such as operation start / stop, that is, command signals are stored, and necessary data or commands are given to the control unit 702 of the indoor unit 20 via the communication path 82. In addition, since the operating device 30 does not perform the role of remotely controlling the indoor unit 20, it is generally called a remote controller or a remote controller for short.
[0010]
The control unit 702 of the indoor unit 20 stores the heat exchanger temperature value D2A detected by the temperature detector D2, other detection data signals, the data signal given from the operation unit 30, and the like, and the heat exchanger temperature value D2A. To the target temperature value TA given from the control unit 703 of the operating device 30 and the heat exchanger 21 and the driving portion V2A of the flow rate adjusting valve V2 that adjusts the flow rate of flowing the heat operating fluid to the heat exchanger 21. The air flow rate of the blower 21A that ventilates the room air is controlled, and a required data signal relating to the operation start / stop / operation state is supplied to the control unit 701 of the heat source device 10 via the communication path 81. Furthermore, when the central monitoring control panel 50 is provided, the control unit 700 of the central monitoring control panel 50 is also provided.
[0011]
The control unit 701 of the heat source unit 10 stores a data signal and a command signal given from the indoor unit 10, and based on these data, switches the channel direction of the channel switching unit 13 and heat exchanger. 12 for controlling the flow rate of the flow control valve V1 that circulates the heat operating fluid to the heat exchanger 12 and the air flow rate of the blower 12A that ventilates the outdoor air to the heat exchanger 12, and when the central monitoring control panel 50 is provided, Necessary data signals relating to the stop / operation state and the like are also supplied to the control unit 700 of the central monitoring control panel 50 via the communication path 81.
[0012]
The control unit 700 of the central monitoring control panel 50 is provided with a data signal relating to operation start / stop / operation conditions and the like set and input from the setting operation unit 76, from the control unit 702 of the indoor unit 10 and the control unit 701 of the heat source unit 20. The data signal such as the data signal is stored, the required one of these data signals is displayed on the display unit 77, and the required data signal and the command signal regarding the operation start / stop / operation state are communicated with the communication path. The control unit 701 and 702 of the heat source unit 10 and the indoor unit 20 are given through 81.
[0013]
The control units 700, 701, 702, and 703 provided in the heat source unit 10, the indoor unit 20, the operation unit 30, and the central monitoring and control panel 50 are mainly composed of a microcomputer type control processing function (hereinafter referred to as a CPU) 70. As shown in FIG. 15, a commercially available CPU board (CPU / B) or the like is used.
[0014]
In FIG. 15, each of the control units 700, 701, 702, and 703 includes detection signals obtained by detecting the states of the respective units, data based on operation signals input by operating the setting operation unit 76, and a communication path 81. Data and control command signals given from other control units via 82 are taken as input data from the input / output port 71 and stored in the work memory 73, for example, RAM, and these data and processing memory 72, for example, based on the processing flow program stored in advance in the ROM and the data memory 74, for example, electrically rewritable PROM, ie, reference values stored in the EEPROM, etc. The control signal for controlling each part obtained in this way and the data signal to be given to the other control part are outputted from the input / output port 71. Are you.
[0015]
Further, the display unit 77 displays data such as the operation state / control state of each part and each setting state as necessary. In the configuration of FIG. 15, each detection signal, each control signal, the setting operation unit 76, and the display unit 77 are in accordance with the configuration of the heat source unit 10, the indoor unit 20, the operation unit 30, and the central monitoring control panel 50. The required items are selected and provided.
[0016]
The communication paths 81 and 82 between the control units 700, 701, 702, and 703 are composed of, for example, a communication two-core coaxial cable, a two-core twisted wire, and the like, and data signals and command signals between the control units 70, for example. A communication I / F 78 is provided as a communication connection interface for transmitting and receiving the communication, and the communication I / F 78 is configured using a communication IC such as the RS232C standard or the RS485 standard.
[0017]
In such a communication configuration, an identification code for communication, that is, a communication address is set in each of the control units 700, 701, 702, and 703, and this communication address is used as data of “destination” and “sender”. For example, the required communication command control is performed by communication using a communication signal such as [Configuration of communication signal] in FIG.
[0018]
The communication path 82 between the control unit 703 of the controller 30 and the control unit 702 of the indoor unit 20 may be configured by a wireless transmission path using optical communication such as infrared rays. A transmission / reception function corresponding to such a wireless transmission path is provided in the I / F 78 portion.
[0019]
In addition, as shown in FIG. 16, the arrangement configuration of each device includes a configuration in which the devices are distributed in one building and a configuration in which the devices are distributed in a plurality of buildings. 81 and 82 are appropriately selected depending on the arrangement and the number of devices. In FIG. 16, the reciprocating portion of each pipe 83 through which the thermal operation fluid flows is simply drawn with a thick solid line.
[0020]
In the processing memory 72 and the data memory 74 of each control unit 700, 701, 702, and 703 in the distributed arrangement type air conditioner 100, a control processing flow program and control necessary for performing the above-described control processing are stored. Data values used for the reference value of the data are stored, but in order to update the function, that is, to upgrade the version according to the progress of the control processing method, the stored contents such as the program and the data value are updated to the latest version. There is a need.
[0021]
As a method for updating the stored contents, generally, a method is adopted in which a memory IC is inserted into a socket and attached, and when necessary, the memory IC can be replaced with the latest stored contents. However, the control units 700, 701, 702, and 703 in the air conditioner need to withstand intermittent vibrations and rapid temperature changes, and contact failure is likely to occur with such a socket mounting method. A method of connecting securely is taken.
[0022]
For this reason, since the old CPU board (CPU / B) has to be replaced, the function update cannot be performed at a low cost and the replacement service requires a long time.
[0023]
On the other hand, since the flash memory has become cheaper due to the technological advancement of the memory IC, the provision of a device in which the flash memory is built in the microcomputer and the stored contents can be rewritten on the substrate is provided in 1996. It is well known by the radio newspaper “High Technology” published on September 26, 1980.
[0024]
This flash memory has the same function as an electrically rewritable PROM (Programmable Read-Only Memory), that is, an EEPROM (Electrically Erasable PROM). However, the flash memory differs in the following points. It is well known from the catalogs of manufacturing companies.
[0025]
That is, first, when changing the stored content, the EEPROM overwrites the original stored content, whereas the flash memory performs the writing after erasing the original stored content. Secondly, the writing speed can be shortened to about 10 μs in the flash memory, that is, 1/1000 that in the EEPROM, compared with about 10 ms in the EEPROM. In the case where the cost per bit is assumed that the EEPROM cost is 100, the flash memory cost can be provided at about 10 or less at present and the cost can be reduced. Fourth, erasing and writing (hereinafter referred to as erasing / writing), that is, rewriting is possible for each block obtained by dividing one flash memory into a plurality of areas. Also, it is that it is possible to perform a protection to prohibit only the erase / write for the required block. Generally, erasing / writing, that is, rewriting can be performed by changing the reading voltage 5V to the erasing / writing voltage 12V.
[0026]
In addition, in a configuration in which a mutual communication configuration in a microcomputer type computer, for example, a small computer device such as a personal computer, is configured using a communication connection interface such as the RS232C standard, a CPU board (CPU / B A configuration in which the rewriting of the stored contents of the PROM arranged above is rewritten by communication from the outside is disclosed in the "Transistor Technology" magazine January 1991 issue and the like.
[0027]
[Problems to be solved by the invention]
According to each of the above prior arts, a configuration in which a control unit having a configuration for storing a CPU control processing program and data in a flash memory performs a required control process on a control target (in the present invention, a flash memory) In the distributed type air conditioner described above, a configuration in which the content stored in the flash memory is rewritten by communication from an external terminal in a CPU type control device or flash memory CPU type control unit) is used. It is conceivable to eliminate the inconvenience at the time of updating the function of the part.
[0028]
However, if the configuration is such that it can be rewritten by communication from the outside, the stored contents will be accidentally erased / rewritten due to miscommunication during communication with other control units, and control processing will run out of control. It will cause a dangerous accident.
[0029]
In other words, for example, in the above-described distributed arrangement type air conditioner, if the control processing flow program of each control unit is rewritten by mistake, the operation control may run away, causing a serious accident such as a fire due to overheating. In the case of a crane or the like that controls the movement of heavy or dangerous goods, there is a problem in that it causes a serious accident such as damage to a building or equipment or a fire.
For this reason, there is a problem that it is desired to provide a storage contents rewritable small computer apparatus and a utilization apparatus thereof without such inconvenience.
[0030]
[Means for Solving the Problems]
  The present invention is as described above.
  In a flash memory CPU type control device having a control unit provided with a function of performing rewriting of stored contents in a required portion of the flash memory based on communication from an external rewrite device,
  A voltage used for the rewrite, that is, a first connection line for transmitting the rewrite voltage from the external rewrite device side to the flash memory CPU type control device side;
  By switching the voltage switching circuit provided on the flash memory CPU type control device side, the rewrite voltage itself applied to the flash memory is replaced with the rewrite voltage applied to the flash memory. A second connection for transmitting as a signal from the flash memory CPU type control device side to the external rewrite device side;
  A third connection line for transmitting the data signal for rewriting from the external rewriter side to the flash memory CPU type control device side;
  Connecting means for connecting the external rewrite device and the flash memory CPU type control device by a connection line including:
  Based on the switching of the voltage switching circuit, when the rewriting voltage itself is transmitted to the external rewriting device side, the data signal for rewriting is sent from the external rewriting device side to the flash memory CPU type control. Data signal transmission means for transmitting to the device side;
  A first configuration providing:
[0031]
  This first configurationIn addition to
  A clock having a least common multiple / frequency with respect to a predetermined plurality of communication speed frequencies, that is, a source clock is generated, and a reception signal obtained by performing the above communication in an asynchronous communication is used as the above source clock or the above Communication speed setting means for setting the communication speed suitable for the above-described rewriting by sampling the clock obtained by dividing the source clock to determine the communication speed
  A second configuration providing:
[0032]
  UpIn addition to the first configuration described above,
  Rewrite storage means for rewriting the entire stored contents or only a part of the required part by dividing the storage area of the flash memory into a plurality of areas and adding the version information to the stored contents stored in the area
  A third configuration for providing
[0033]
  In addition to the first configuration above,
  A discriminating means for discriminating whether or not the above-mentioned rewriting has been normally performed depending on whether or not the total value of the storage addresses of the places where the above-mentioned rewriting has been performed is a predetermined value
  A fourth configuration providing:
[0034]
  A heat source device for supplying at least a heat source for air conditioning to a flash memory CPU type control unit having a control unit provided with a function of performing rewriting of stored contents in a required part of the flash memory based on communication from an external rewrite unit In the distributed arrangement type air conditioner installed in the indoor unit
  In the first configuration aboveConnection means / data signal transmission meansA fifth configuration providing:
  The fifth configuration described aboveIn addition to
  Communication speed setting in the second configurationProvide meansA sixth configuration,
[0035]
  The fifth configuration described aboveIn addition to
  In the third configuration aboveRewrite storage meansA seventh configuration for providing
  The fifth configuration described aboveIn addition to
  Discriminating means in the above fourth configurationThe above-described problem is solved by the eighth configuration provided with the above.
[0036]
DETAILED DESCRIPTION OF THE INVENTION
As an embodiment of the present invention, an embodiment in which the present invention is applied to the configuration of the distributed arrangement type air conditioner 1000 described with reference to FIGS. 14 to 16 will be described.
[0037]
【Example】
Examples will be described below with reference to FIGS. 1 to 13 are portions having the same functions as the portions having the same reference numerals described in FIGS. 14 to 16. 1 to 13 are portions having the same functions as the portions having the same reference numerals described in any of FIGS. 1 to 13.
[0038]
[First embodiment]
The first embodiment will be described below with reference to FIGS. In FIG. 1, the distributed arrangement type air conditioner 1000 shows only a basic configuration part in which each of the heat source unit 10, the indoor unit 20, and the operation unit 30 is representatively arranged, but depending on the size of the device, The arrangement of the required number of bases and the arrangement of the central monitoring control panel 50 as necessary are as described in the description of the prior art.
[0039]
And the location where the configuration of the heat source unit 10, the indoor unit 20 and the operating unit 30 is different from the configuration of the prior art of FIGS. 14 and 15 is the processing memory 72 for storing the program of the control processing flow as the first change location. In place of the data memory 74 for storing data necessary for the control processing, a processing / data flash memory 72A in which the stored contents are stored in a commercially available flash memory is provided. The location is a read voltage Vp1 for reading (generally referred to as Vpp, but here abbreviated as Vp), for example, only 5V for the read / erase / write voltages of the processing / data flash memory 72A. 86, the erase / write, that is, the erase / write voltage Vp2 for rewrite, for example, 12V, is applied from the external rewriter 200 described later. Together constituting a portion of which is configured by providing a voltage switching circuit 85 to provide only one of the read voltage Vp1 or erase / write voltage Vp2 to the flash memory 72A for processing / data.
[0040]
Then, the third changed portion is connected to the connection portions 87A, 87B and 87D where the communication paths 81 and 82 and each communication I / F 78 are connected, that is, to the connection portion of the connection terminal or connector from the external rewrite device 200. This is a location provided with a connection location for applying the erase / write voltage Vp2.
[0041]
Specific configurations of the first to third changed portions will be described later with reference to FIGS. In addition, only the outline | summary is shown about the steady control structure part with respect to the location of another operation function, and the detailed part is abbreviate | omitted.
[0042]
The external rewrite unit 200 connects the connection portion 87E to the connection portions 87A, 87B, and 87D of the heat source unit 10, the indoor unit 20, and the operation unit 30, and each of the heat source unit 10, the indoor unit 20, and the operation unit 30. A type of portable terminal for rewriting the contents stored in a required part in the processing / data flash memory 72A provided in the control units 701, 702, and 703, and a portable personal computer configured for the purpose. It may be a thing.
[0043]
The configuration of the control unit 705, setting operation unit 76, communication I / F 78, etc. in the external rewrite device 200 is the same as that of the control units 701, 702, 703 of the heat source unit 10, the indoor unit 20, and the operation unit 30. The power supply unit 88 obtains the read voltage Vp1 and the erase / write voltage Vp2 for the processing / data flash memory 72A, and the voltage switching circuit 89 sets the read voltage Vp1 or the erase / write voltage Vp2. One of them is configured to be supplied to the processing / data flash memory 72A, and further, the connection portion 87E is connected to the connection portions 87A, 87B, and 87D of the heat source device 10, the indoor unit 20, and the operation unit 30, respectively. While performing communication by the communication I / F 78, the erase / write voltage Vp2 is set to each voltage of the heat source unit 10, the indoor unit 20, and the operation unit 30. It is constituted as given circuit 85.
[0044]
Each processing / data flash memory 72A provided in each control unit 701, 702, 703 of the heat source unit 10, indoor unit 20, and operation unit 30, and each processing / data flash provided in the control unit 705 of the external rewrite device 200 As shown in FIG. 2, the storage configuration with the memory 72B is that the storage area in each processing / data flash memory 72A, 72B is divided into a plurality of areas, that is, blocks, and the storage contents in a specific required portion are rewritten. Is protected, and the entire stored contents or only a part of the other required parts can be erased / written, that is, rewritten as necessary.
[0045]
The specific storage configuration is as follows. That is, in the processing / data flash memory 72B on the external rewrite device 200 side, the storage area (1) 72B1 from the address A1 to the address B1 has a communication / rewrite control processing program, that is, a communication control process and rewrite. A program for control processing is stored and a rewrite prohibition protection is applied.
[0046]
The storage area (2) 72B2 from address B1 + 1 to address C1 stores the master of the control processing program for heat source unit control, that is, the parent storage of the program for air conditioning control in the control unit 701 of the heat source unit 10. In the storage area (3) 72B3 from the address C1 + 1 to the address D1, the master of the heat source unit control data, that is, the parent storage of the data for the air conditioning control in the control unit 701 of the heat source unit 10 is stored.
[0047]
Further, in the storage area (4) 72B4 from the address D1 + 1 to the address E1, the master of the indoor unit control control processing program, that is, the parent storage of the program for the air conditioning control in the control unit 702 of the indoor unit 20 is stored. The storage area (5) 72B5 from E1 + 1 to address F1 stores the master of the indoor unit control data, that is, the parent storage of the data for air conditioning control in the control unit 702 of the indoor unit 20.
[0048]
Further, in the storage area (6) 72B6 from the address F1 + 1 to the address G1, the master of the control processing program for operating device control, that is, the parent storage of the program for air conditioning control in the control unit 703 of the operating device 30, The storage area (7) 72B7 from the address G1 + 1 to the address H1 stores the master of the operating device control data, that is, the parent storage of the data for the air conditioning control in the control unit 703 of the operating device 30. These storage areas (1) 72B1 to (7) 72B7 may be rewritable, and are protected from being rewritten and rewritten after the rewrite prohibition is canceled when rewriting is required. You may make it perform.
[0049]
Note that the storage area (8) 72B8 from the address H1 + 1 to the address I1 is a case where the storage contents to be stored in the storage area (1) 72B1 to the storage area (7) 72B7 increase and the storage capacity is insufficient. It is an empty part provided as a spare.
[0050]
Next, specific storage configurations in the processing / data flash memories 72A provided in the control units 701, 702, and 703 of the heat source unit 10, the indoor unit 20, and the operation unit 30 are respectively from address A2 to address B2. The storage area (1) 72B1 stores a communication / rewrite control processing program, that is, a program for communication control processing and rewrite control processing, and is protected from rewrite prohibition.
[0051]
Further, in the storage area (2) 72B2 from address B2 + 1 to address C2, the master of the control processing program for control, that is, the control unit (corresponding to one of 701, 702, and 703) is for air conditioning control. Is stored in the storage area (3) 72B3 from the address C2 + 1 to the address D2 in the master for control data, that is, in the corresponding control unit (corresponding to one of 701, 702, and 703). The parent storage of the data for air conditioning control is stored, and these storage areas (1) 72A1 to (3) 72A4 may be rewritable, and are protected from being overwritten. When rewriting is required, rewriting may be performed after canceling rewriting prohibition.
[0052]
It should be noted that the storage area (4) 72A4 from the address D2 + 1 to the address E2 is a case where the storage contents to be stored in the storage area (1) 72A1 to the storage area (3) 72A3 increase and the storage capacity is insufficient. It is an empty part provided as a spare. In addition, in the stored contents as the master and the original stored contents of the rewritten location, “version No.” representing the revision number, that is, the version number is stored in a predetermined part of the stored contents, for example, the first part. It is.
[0053]
Next, with reference to FIG. 3, a specific configuration of each of the connection portions 87A, 87B, 87D, and 87E, adjustment of the communication speed, and switching between the read voltage Vp1 and the erase / write voltage Vp2 will be described. Note that FIG. 3 shows the storage contents of the required portions of the processing / data flash memory 72A provided in the control units 701, 702, and 703 of the heat source unit 10, the indoor unit 20, and the controller 30. Only the components necessary for rewriting are extracted and described by communication with the control unit 705, and the other parts are omitted.
[0054]
In FIG. 3, a communication I / F 78 is a communication interface IC having a configuration for performing transmission / reception of the RS232C standard, for example, and is a connection portion 87A / 87B / 87D / 87E, for example, a connector terminal, that is, a connection Of the pin configuration, the terminals TxD, RxD, RTS, CST, DSR, GND, and DTR indicate common abbreviations in the [connection part / abbreviation table] in the figure, and are RS232C (JISx5101) standards. Pin no. Although the standard pin arrangement is formal, if the same connector with the required number of pins is connected with the same pin arrangement, the communication path 81/82 or the connection cable 81A is set to the required connection. Normal communication can be performed according to the configuration of the interconnection circuit and the signal direction in [Connection part / abbreviation table]. Note that the connection portion 87C provided in the indoor unit 20 of FIG. 1 and the communication I / F 78 connected thereto are also similar to the above configuration, but the rewriting processing of each processing / data flash memory 72A is performed. Since it is not related, description is omitted here.
[0055]
In this communication, there are a synchronous type and an asynchronous type, but the capability of the communication I / F 78 IC used for the control units 701, 702, and 703 of the heat source unit 10, the indoor unit 20, and the controller 30, Since various restrictions are imposed on the communication speed depending on the lengths of the communication channels 81 and 82, in order to make the communication speed bps as high as possible, in general, several types as shown in [communication speed / sampling frequency table] in FIG. The available communication speeds can be selected and used.
[0056]
On the other hand, since the control unit 705 of the external rewrite unit 200 is similarly configured, when performing rewriting work on site, the control units 701, 702, and control units of the heat source unit 10, the indoor unit 20, and the operation unit 30 are performed. When the communication speed bps used in 703 is known, the communication speed of the control unit 705 of the external rewrite device 200 may be set to the communication speed bps for communication.
[0057]
However, in general, since it is often troublesome to investigate it on site, after performing asynchronous communication, sampling the communication, and confirming the communication speed bps, the processing / data flash memory 72A If the communication speed bps suitable for the rewrite control of the stored content is set, the operation is easier and easier.
[0058]
In order to perform asynchronous communication, an appropriate communication signal such as an identification signal for communication is sent from each control unit 701, 702, 703 of the heat source device 10, the indoor unit 20, and the controller 30. Since it is possible to know the communication speed by sampling the signal received by the control unit 705 of the external rewrite device 200 in advance as a signal, in general, the communication speed / sampling frequency table in FIG. A function to generate a clock with the least common multiple / frequency is provided, and the communication speed bps of the other party is determined by sampling with the clock or a clock obtained by dividing the clock, and communication with each other is possible. The flash memory 72A is set to the highest possible communication speed bps without any trouble in erasing / writing, that is, rewriting.
The communication for setting the communication speed bps is performed by, for example, sending a transmission request command signal, that is, an RST signal from the control unit 705 side of the external rewrite unit 200, and the heat source unit 10, the indoor unit 20, and the operation unit 30. When the response from the control units 701, 702, and 703 is a negative response signal, that is, a NAK signal, the communication speed bps is changed, and when it is an affirmative signal, that is, an ACK signal, The communication speed bps is set as the mutual communication speed bps.
[0059]
Further, the erase / write voltage Vp2 is supplied from the external rewrite unit 200 to the heat source unit 10, the indoor unit 20, and the operation unit 30 through the connection portions 87A, 87B, 87D, and 87E. Erasing / writing voltage Vp2 is applied to processing / data flash memory 72A as a connection terminal for giving to memory 72A, that is, as a connection pin, and from heat source unit 10, indoor unit 20, and controller 30 side Terminals Vp2IN and Vp2OUT are provided as connection terminals for providing the above signal to the external rewrite device 200 side, that is, as connection pins.
[0060]
  On the external rewrite device 200 side, the power supply 88 for obtaining the read voltage Vp1 and the erase / write voltage Vp2 and either the read voltage Vp1 or the erase / write voltage Vp2 are processed / data flash. A voltage switching circuit 89 is provided for switching so as to be applied to the memory 72B. The voltage switching circuit 89 is, for example, a switching relay, and controls the control unit 705 when necessary.Based on reasonSwitching to a required connection side is performed by a control signal from an input / output port (not shown).
[0061]
On the other hand, on the side of the heat source unit 10, the indoor unit 20, and the operation unit 30, a power source 86 for obtaining the read voltage Vp1 and the read voltage Vp1, or one of the connection portions (87A, 87B, 87D and 87E, Is provided with a voltage switching circuit 85 for switching so that any one of the erasing / writing voltages Vp2 applied via the connection) is applied to the processing / data flash memory 72A. For example, a switching relay, which switches to the required connection side by a control signal from an input / output port (not shown) by a control process (one of 701, 702, 703) when necessary. To do.
[0062]
Control processing for erasing / writing, that is, rewriting, the stored contents in a required portion of the processing / data flash memory 72A is performed by connecting the connection portions 87A, 87B, 87D, 87E, for example, the connector, the communication path 81, or the communication 82 is removed, and instead, the connection portion 87E is connected to any one of the connection portions 87A, 87B, and 87D by the connection cable 81A.
[0063]
2 in the processing / data flash memory 72B of the control unit 705 of the external rewrite device 200, and the control units 701, 702, and 703 of the heat source unit 10, the indoor unit 20, and the operation unit 30. 4 is stored in the storage area (1) 72A1 of FIG. 2 in the processing / data flash memory 72A, and can be executed by performing communication control based on the program. .
[0064]
As a matter of course, the voltage switching circuit 89 of the external rewrite device 200 and the voltage switching circuit 86 on the heat source unit 10, the indoor unit 20, and the operation unit 30 are always processed / data read voltage Vp1. The flash memory 72A and 72B are held so as to be given.
[0065]
[Explanation of control processing flow]
Hereinafter, the control processing flow of FIG. 4 will be described. In FIG. 4, the control processing flow on the [external rewrite device side] operates a predetermined key in the setting operation unit 76 of the external rewrite device 200 and inputs the code of the master performing the rewrite processing, thereby storing the storage area ( 1) “Begin” by designating which one of 72B1 to storage area (7) 72B7 is used for the rewriting process.
[0066]
In addition, the control processing flow on the [heat source unit (indoor unit / operator) side] is “started” by turning on the operation power of the heat source unit 10, the indoor unit 20, and the controller 30 to be rewritten. Is done. In the control processing flow of FIG. 4, a route indicated by a dotted line is a portion that performs communication between the [external rewriter side] and the [heat source unit (indoor unit / operator) side].
[0067]
◆ At step SP0, [heat source unit (indoor unit / operator) side] is set to “transmittable / CST”, and at step SP1, “transmission request / RTS” is sent from [external rewriter side]. By doing so, in step SP2, the own "identification code", that is, the communication address is transmitted from the [heat source unit (indoor unit / operator) side].
[0068]
In step SP3, it is determined whether or not the communication speed is correct. If it is appropriate, the process proceeds to step SP6, and if not, the process proceeds to next step SP4. In this determination, sampling in the case of the asynchronous communication described above is performed to determine the communication speed bps, and the erase / write speed of the processing / data flash memory 72A, that is, the rewrite speed is too high. Or, if it is too slow, “NO” is determined, and if it is an appropriate speed, for example, 1200 bps or 2400 bps, it is determined as “YES” and its own communication speed bps is set on the [heat source unit (indoor unit / operator) side] ] Is performed to match the communication speed bps.
[0069]
◆ In step SP4, by sending a self-identification code at an appropriate communication speed bps, command the communication speed bps to match the communication speed bps of the [heat source unit (indoor unit / operator) side], In step SP5, after the communication speed bps that has been communicated is matched, its own “identification code” is transmitted. In step SP3, it is confirmed again whether or not the communication speed is appropriate.
[0070]
◆ In step SP6, a command for confirming the “version No.” is transmitted, and the processing / data flash memory 72A on the [heat source unit (indoor unit / operator) side) “ Version No. ”is transmitted as a response, and it is determined whether or not rewriting is required in step SP8.
[0071]
The determination here is whether the rewritten location is specified by the match / mismatch of the stored “version No.” and the “version No.” of the storage location of the master that is going to be transmitted, It is checked whether or not rewriting is necessary by checking whether or not the stored contents of the rewriting part have already been updated to the latest version. When rewriting is necessary, the process proceeds to the next ◆ step SP9, otherwise, the process proceeds to step SP17, and “rewriting impossible” is displayed on the display unit 77 of [external rewriting device side] at step SP17. Later, the control process ends.
[0072]
In this case, since the control processing on the [heat source unit (indoor unit / operator) side] is stopped in the middle, the worker who sees the above-mentioned “non-rewriteable” display [ Terminate by turning off the operating power on the (indoor unit / operator) side.
[0073]
In step SP9, although not shown, first, a command to switch the voltage switching circuit 85 on the [heat source unit (indoor unit / operator) side] to apply the erase / write voltage Vp2 to the processing / data flash memory 72A As a signal for transmitting that the erase / write voltage Vp2 has been applied, a voltage obtained by branching the erase / write voltage Vp2 given to the processing / data flash memory 72A is selected as a heat source unit (indoor unit / Control of the [external rewriter side] from the terminal Vp2 / OUT on the [operator side] via the connection cable 81A and given to the input / output port 71 of the control unit 705 from the terminal Vp2 / IN on the [external rewriter side] In the case of the storage area to be rewritten, for example, the storage area (2) 72B2, after confirming by the unit 705, the data obtained by reading the stored contents is transmitted to the [heat source machine side]. . The voltage switching circuit 85 may be switched manually, for example, by a switch, and switched manually prior to the rewriting process.
[0074]
In step SP10, based on the data sent from the [external rewriter side], after erasing / writing the storage contents of the storage area to be rewritten, for example, the storage area (2) 72A2, the next step SP11 Migrate to In this erasure / write, it is more erroneous to erase the storage contents of the storage area to be rewritten first and then write the required part so that the original storage contents do not remain. This is preferable because it does not cause confusion by reading the original stored contents.
[0075]
In step SP11, it is determined whether or not the rewrite data is finished. When it is finished, the process proceeds to the next step SP12. Otherwise, the process returns to SP10 to perform rewriting with the remaining data.
[0076]
In step SP12, it is determined whether rewriting has been performed normally. If it is normally performed, the process proceeds to step SP14. If not, the process proceeds to step SP13, and rewriting is performed again. The determination here is performed based on whether or not the total value of the storage addresses of the rewritten locations is a predetermined value.
[0077]
Specifically, for example, if the storage contents of the storage area (2) 72A2 are rewritten by the storage contents of the storage area (2) 72B2, the storage contents of the storage area (2) 72B2 By storing a numerical value in which the lower two digits of the total value of the total of the addresses of the storage area (2) 72A2 where the stored contents are rewritten is “00”, the [heat source machine (indoor The machine / operator side) is configured to confirm that the total value is “00”.
[0078]
In step SP13, a request command for performing the rewriting process is transmitted to the [external rewriter side] again, and the process returns to step SP8, where rewriting of the same rewriting target portion is performed again, that is, rewriting data is transmitted and erased / written. And do.
[0079]
In step SP14, the voltage switching circuit 85 is switched to return to the state where the read voltage Vp1 is applied to the processing / data flash memory 72A, and the rewriting process is performed [the heat source unit (indoor unit / operator) side] ], The display unit 77 displays “rewrite complete”, and then transmits a response to the effect that the rewrite is completed to the [external rewriter side], and proceeds to step SP15.
[0080]
In step SP15, after confirming that the signal due to the erase / write voltage Vp2 given to the terminal Vp2 / IN of the connection portion 87E has disappeared in the input / output port 71 of the control unit 705 on the [external rewrite side] , “Rewriting complete” is displayed on the display portion 77 of the [external rewriter side], and the control process is terminated. In the case of a configuration in which the voltage switching circuit 85 is manually switched, an operator who sees the above-mentioned “rewriting completion” display may manually switch to the read voltage Vp2 side.
[0081]
In the above embodiment, a configuration is described in which the external rewrite device 200 performs rewrite processing on the processing / data flash memory 72A provided in each control unit 701, 702, 73 of the distributed arrangement type air conditioner 1000 that performs air conditioning control. However, in the device for controlling another general control target, that is, the flash memory CPU type control device, the processing / data flash memory 72A provided in the control unit is similar to the above-described rewriting processing, The fact that the rewriting process can be performed by the external rewriting device 200 will not require any particular explanation.
[0082]
  [ExampleConfiguration summary]
  To summarize the configuration of the above embodiment, in the configuration of the other general control object, that is, the configuration of the flash memory CPU type control device,
  For example, the rewriting of the storage contents in a required portion of the flash memory such as the processing / data flash memory 72A, for example, the storage area (2) 72A2, is performed by communication from the external rewrite device 200, for example, communication by the communication I / F 78. In a control unit having a function to be performed based on, for example, a flash memory CPU type control device having a control unit 701,
[0083]
  The voltage used for rewriting the flash memory (processing / data flash memory 72A), that is, the rewrite voltage is transferred from the external rewrite device 200 side to the control unit 701 (flash memory CPU type control device or flash memory CPU type control unit) side. A first connecting line for transmission and,
  By switching the voltage switching circuit 85 provided on the control unit 701 (flash memory CPU type control device) side, the rewrite voltage (erase / write voltage Vp2) applied to the flash memory (processing / data flash memory 72A) itself is changed. As a signal indicating that the rewrite voltage (erase / write voltage Vp2) is applied to the flash memory (processing / data flash memory 72A), the external rewrite device 200 from the control unit 701 (flash memory CPU type control device) side. A second connection for transmitting to the side,
  By a connection line including a third connection line for transmitting a data signal for rewriting from the external rewrite device 200 side to the control unit 701 (flash memory CPU type control device or flash memory CPU type control unit) side ,
  Connection means for connecting the external rewrite device 200 and the control unit 701 (flash memory CPU type control device or flash memory CPU type control unit);
[0084]
  Based on the switching of the voltage switching circuit 85, when the rewrite voltage (erase / write voltage Vp2) itself is transmitted to the external rewrite device 200 side, a data signal for rewrite is transmitted from the external rewrite device 200 side to the control unit. 701 (flash memory CPU type control device) data signal transmission means for transmitting to the side
  A first configuration providing:
[0085]
  This first configurationIn addition to
  A clock having a least common multiple / frequency with respect to a plurality of predetermined communication speed frequencies, that is, a source clock is generated, and a received signal obtained by performing the communication in an asynchronous communication is used as the source clock or the source. Communication speed setting means for setting a communication speed suitable for rewriting the flash memory (processing / data flash memory 72A) by sampling the clock obtained by dividing the clock to determine the communication speed.
  A second configuration providing:
[0086]
  First configuration described aboveIn addition to
  The storage area of the flash memory (the processing / data flash memory 72A) is divided into a plurality of areas, and the storage contents stored in this area are added with version information and stored. Rewrite storage means to rewrite only a part
  A third configuration for providing
[0087]
  First configuration described aboveIn addition to
  Location of the above rewrite, for example, the storage area (2) 72A2The total storage address isDiscriminating means for discriminating whether or not the rewritten storage location is a regular storage location depending on whether or not a predetermined value, for example, the lower two digits are “00”
  A fourth configuration providing:
[0088]
  For example, the rewriting of the storage contents in a required portion of the flash memory such as the processing / data flash memory 72A, for example, the storage area (2) 72A2, is performed by communication from the external rewrite device 200, for example, communication by the communication I / F 78. A flash memory CPU type control unit, for example, control units 701 and 702 provided with a function to be performed based on at least a heat source device 10 and an indoor unit 20 for supplying and supplying a heat source for air conditioning. In apparatus 100,
  In the first configuration aboveConnection means / data signal transmission meansA fifth configuration providing:
[0089]
  The fifth configuration described aboveIn addition to
  In the second configuration aboveCommunication speed setting meansA sixth configuration providing:
[0090]
  The fifth configuration described aboveIn addition to
  In the third configuration aboveRewrite storage meansA seventh configuration for providing
  The fifth configuration described aboveIn addition to
  Eighth providing the discrimination means in the fourth configuration described aboveConfiguration and
  It will constitute that.
[0091]
[Second Embodiment]
The second embodiment will be described below with reference to FIGS. The second embodiment is a specific implementation configuration of a portion for performing the rewriting process in the first embodiment. In FIG. 5, a processing / data flash memory 72A (72B) is, for example, a 128-kbyte ROM flash memory, and each storage area between addresses shown in FIG. The addresses are divided into storage areas and are configured to be able to be erased / written, that is, rewritten. Each address 00000 to 1FFFF is expressed by a hexadecimal number in which numbers 10 to 15 are represented by A to F. Erase / write can be performed according to the address value.
[0092]
In FIG. 6, [Storage area / version No. Each signal of the confirmation communication signal] is a configuration example of a signal used for the control processing for confirming the “version No.” in the first embodiment, and is from the CPU 70 side of the external rewriter 200. A command signal S01A and a response signal S01B from the CPU 70 side of the device to which the external rewrite device 200 is connected, that is, any one of the heat source device 10, the indoor unit 20, and the operation device 30 to be rewritten It is a specific signal example with a structure.
[0093]
Further, each signal of [storage area / erase communication signal] is a signal used for the control process of the part that performs only “erase” in the control process that performs “erase / write” in the first embodiment. It is an example of the configuration, and the command signal S02A from the CPU 70 side of the external rewrite device 200 and the device to which the external rewrite device 200 is connected, that is, the heat source device 10, the indoor unit 20, and the operation device 30 to be rewritten. It is a concrete signal example with the structure of response signal S02B from the CPU70 side of any one apparatus.
[0094]
Further, each signal of [storage area / program / data write communication signal] controls the portion of the control process for performing “erase / write” in the first embodiment that performs only “write”. This is a configuration example of signals used for processing, including: a command signal S03A from the CPU 70 side of the external rewrite device 200, and a device to which the external rewrite device 200 is connected, that is, the heat source device 10 and the indoor unit 20 to be rewritten. This is a specific signal example with the configuration of the response signal S03B from the CPU 70 side of any one of the operating devices 30.
[0095]
FIG. 7 is an example of a control process flow in which “version No.” confirmation, “erasure”, and “write” are performed in accordance with the communication signals described above. Hereinafter, the control processing flow of FIG. 7 will be described. The [external rewriter side] is a control process performed by the CPU 70 of the external rewriter 200, and the [heat source unit (indoor unit / operator) side] is the heat source unit 10 / indoor unit 20 / operator 30 to be rewritten. Is a control process performed by the CPU 70 of any one of the devices, and a portion indicated by a dotted line is a portion that performs communication.
[0096]
[Explanation of control processing flow]
In step SP101, the command signal S01A of FIG. 6 is transmitted as a command for confirming the “version No.”, and the process proceeds to step SP102.
In step SP102, “002” obtained by reading the “version No.” of the block in the storage area instructed to be rewritten, that is, the block 1 is changed to the version No. 6 is transmitted as response data, and the process proceeds to step SP103.
[0097]
In step SP103, it is determined whether or not “rewriting” needs to be performed. When rewriting is performed, the process proceeds to the next step SP104, and when not, the process is terminated. This determination is made by reading the “version No.” stored in the storage area target of the rewrite master stored in the processing / data flash memory 72B of the external rewriter 200 and the response When the response data “002” of the “version No.” sent is compared with each other, if it is the same, it is not necessary to perform “rewrite”. If not, it is necessary to perform “rewrite”. It shall be.
[0098]
In step SP104, the command signal S02A of FIG. 6 is transmitted as a command for “erasing” the storage area for “rewriting”, and the process proceeds to step SP105.
In step SP105, the block of the storage area instructed to be erased, that is, the “erasure” process of block 1 is performed, and the process proceeds to the next step SP106.
[0099]
◆ In step SP106, the response signal S02B of FIG. 6 is transmitted with the data of “erase state” obtained as a result of the “erase” process, that is, the erase end “A1” or the erase failure “A2” as response data. The process proceeds to step SP107.
[0100]
In step SP107, it is determined whether or not “erasing” has been normally performed. If successful, the process proceeds to the next step SP108, and if not, the process proceeds to step SP112. This determination is normal when the response data of the response signal S02B is erasure end “A1”, and when the erasure failure is “A2”, it is determined that it was not performed normally, that is, “erasure abnormality”.
[0101]
In step SP108, the command signal S03A of FIG. 6 is transmitted as a command for writing to the designated storage area, and the process proceeds to step SP109.
In step SP109, “write” processing of “write data” transmitted by the command signal S03A is performed on the block of the storage area commanded as the write target, that is, block 1, and the next step SP110 is executed. Transition.
[0102]
In step SP110, the response signal shown in FIG. 6 is obtained with “write state” data obtained as a result of the “write” processing, that is, write end “B1” or write failure “B2” as response data. After transmitting S03B, the control process on the [heat source unit (indoor unit / operator) side] ends, and the process proceeds to step SP111.
[0103]
In step SP111, it is determined whether or not “write” has been performed normally. If it has been performed normally, the process ends. If not, the process proceeds to step SP114. This determination is normal when the response data of the response signal S03B is the write end “B1”, and when the write failure is “B2”, it is not normally performed, that is, “write abnormality”.
[0104]
In step SP112, an alarm indicating that the erase state of the designated storage area is “erase abnormality”, that is, “erase abnormality alarm” is performed, and the process proceeds to the next step SP113. For example, the alarm is displayed on the display unit 77 attached to the control unit 705 of the external rewrite device 200 with a character or a graphic, and an alarm is provided on the display unit 77 as necessary.
[0105]
In step SP113, it is determined whether or not an operation for canceling the “erase abnormality alarm” has been performed. If it has been cancelled, the process proceeds to the end, and if not, the process returns to step SP112. This release is performed by operating a predetermined operation key provided on the setting operation unit 76 attached to the control unit 705 of the external rewriter 200, for example.
[0106]
In step SP114, an alarm indicating that the writing state of the designated storage area is “writing abnormality”, that is, “writing abnormality alarm” is performed, and the process proceeds to the next step SP115. For example, the alarm is displayed on the display unit 77 attached to the control unit 705 of the external rewrite device 200 with a character or a graphic, and an alarm is provided on the display unit 77 as necessary.
[0107]
In step SP115, it is determined whether or not an operation for canceling the “writing abnormality alarm” has been performed. If it has been canceled, the process proceeds to the end, and if not, the process returns to step SP114. This release is performed by operating a predetermined operation key provided on the setting operation unit 76 attached to the control unit 705 of the external rewriter 200, for example.
[0108]
[Third embodiment]
The third embodiment will be described below with reference to FIGS. The third embodiment is a specific implementation configuration of the portion for performing the communication speed changing process in the first embodiment. In FIG. 8, each signal of [communication speed / change communication signal] is a configuration example of a signal used for control processing for performing “communication speed change” in the first embodiment described above. The command signal S04A from the CPU 70 side of the CPU 200 and the device to which the external rewrite device 200 is connected, that is, the CPU 70 side of any one of the heat source device 10, the indoor unit 20 and the operation device 30 to be rewritten It is a concrete signal example with the structure of response signal S04B from. The communication speed is selected from the communication speeds corresponding to the speed symbols “10” to “14” shown in the command signal S04A.
[0109]
FIG. 7 is an example of a control processing flow in which “communication speed change” is performed according to each communication signal. Hereinafter, the control processing flow of FIG. 7 will be described. In addition, the [external rewriter side] [heat source unit (indoor unit / operator) side] and the portion indicated by the dotted line are the same as those in FIG. 7, [heat source unit (indoor unit / operator) side] The initial value of the communication speed is set to the communication speed corresponding to the speed symbol “11”.
[0110]
[Explanation of control processing flow]
In step SP201, the command signal S04A of FIG. 8 is transmitted as a command for “change communication speed”, and the process proceeds to step SP202.
[0111]
In step SP202, it is determined whether or not “speed change” of the communication speed is possible. If it is possible, the process proceeds to the next step SP203, and if not, the process proceeds to step SP205. This determination is made by transmitting the data obtained by reading the data of each “communication speed symbol” stored in the processing / data flash memory 72A on the [heat source unit (indoor unit / operator) side] and command transmission. The data “13” of the “communication speed symbol” is compared, and if there is the same symbol as the data “13”, the communication speed is “changeable in speed”. It cannot be changed.
[0112]
In step SP203, the changeable / not changeable data symbol in the response signal S04B in FIG. 8 is transmitted with the change permission “C1”, the process proceeds to step SP206, and the process proceeds to the next step SP204.
In step SP204, after changing the communication speed to the communication speed of the data “13”, the control process on the [heat source unit (indoor unit / operator) side] is terminated.
[0113]
In step SP205, the data symbol indicating whether or not the response signal S04B shown in FIG. 8 can be changed is changed to “C2”, and the process proceeds to step SP206.
In step SP206, it is determined whether or not the communication speed is to be changed. If it is to be changed, the process proceeds to the next step SP207, and if not, the process is terminated without changing the communication speed. This determination is made when the change permission / inhibition data of the response signal S04B is change permission “C1”, and is not changed when the change rejection “C2”.
◆ In step SP204, the communication speed is changed to the communication speed of the data “13”, and the process ends.
[0114]
[Fourth embodiment]
The fourth embodiment will be described below with reference to FIGS. The fourth embodiment is a specific implementation configuration of a portion that performs a control process for determining whether or not the rewriting in the first embodiment has been normally performed. In FIG. 10, the processing / data flash memory 72B of the external rewrite device 200 is, for example, a 128-kbyte ROM flash memory, and each storage area between appropriate addresses is divided into eight blocks 0-7. It is divided into storage areas.
[0115]
In block 0, the control processing program for the external rewrite device 200 itself, in block 1, the rewriting master (1) for rewriting the control processing program for the heat source device 10, and in block 2, the control processing for the indoor unit 20. The rewrite master (2) for rewriting the program is stored, and the rewrite master (3) for rewriting the control processing program of the operating device 30 is stored in the block 3, respectively. The other blocks 4 to 7 are unused portions. That is, it is an empty portion, and the address total value determination data ALLSUM is stored in the final address 1FFFF.
[0116]
In FIG. 11, the processing / data flash memory 72A of any one of the heat source device 10, the indoor unit 20, and the controller 30 to be rewritten is, for example, a 128-kbyte ROM flash memory. Each storage area between the address 0000 and the address immediately before the address 1C000 is a storage area for storing its own control processing program. The storage area from address 1C000 to the final address 1FFFF is an unused part, that is, an unused storage area, and the final address 1FFFF is an address for storing the address total value determination data ALLSUM. Yes.
[0117]
If the total value of addresses between address 0000 and the previous address of address 1C000 is 55h in hexadecimal and the total value of addresses in each unused storage area is FFh in hexadecimal, The value of the value discrimination data ALLSUM can be obtained by the calculation according to [Calculation Formula of Address Total Value Discrimination Data (ALLSUM)] in FIG. 11, and is used to determine whether the rewriting has been normally performed. The value of the address total value determination result data FLASHSUM, that is, the value for setting the last two digits to 00h can be obtained by the calculation according to [Calculation formula of address total value determination result data (FLASHSUM)] in FIG.
[0118]
In FIG. 12, each signal of [communication signal for determining the total address value] is a configuration example of a signal used for the control processing for determining the total address value described above, and ◆ from the CPU 70 side of the external rewrite device 200 The command signal S05A and the response signal S05B from the CPU 70 side of the device to which the external rewrite device 200 is connected, that is, any one of the heat source device 10, the indoor unit 20 and the operation device 30 to be rewritten It is a specific signal example with a structure.
[0119]
FIG. 13 is an example of a control process flow for determining the total address value based on each communication signal. Hereinafter, the control processing flow of FIG. 13 will be described. The [external rewrite device side] [heat source unit (indoor unit / operator) side] and the portion indicated by the dotted line are the same as in FIG.
[0120]
[Explanation of control processing flow]
In step SP301, a command signal S05A in FIG. 12 is transmitted as a command for determining the total address value, and the process proceeds to step SP302.
[0121]
In step SP302, the data of the discrimination data ALLSUM sent by the command signal S05A, for example, hexadecimal “10F0101h” is stored in the final address 1FFFF, and the “address total value discrimination result data (FLASHSUM)” of FIG. Then, the determination result data FLASHSUM, for example, “001000h” in hexadecimal is obtained, and the process proceeds to the next step SP303.
[0122]
In step SP303, the response signal discrimination result data in FIG. 12 is transmitted as FLASHSUM “001000h”, and the process proceeds to step SP304 and the control process on the heat source unit (indoor unit / operator) side is terminated.
[0123]
In step SP304, it is determined whether or not the result of address total value determination is normal. If it is normal, the process ends. If not, that is, if it is abnormal, the process proceeds to the next step SP305. This determination is normal when the last two digits of the determination result data FLASHSUM “001000h” of the response signal S05A is “00h”, and abnormal otherwise.
[0124]
In step SP305, an alarm indicating that the result of determining the total address value is abnormal, that is, “discrimination abnormality alarm” is performed, and the process proceeds to the next step SP306. For example, the alarm is displayed on the display unit 77 attached to the control unit 705 of the external rewrite device 200 with a character or a graphic, and an alarm is provided on the display unit 77 as necessary.
[0125]
In step SP306, it is determined whether or not an operation for canceling the “determination abnormality alarm” has been performed. If it has been canceled, the process proceeds to the end, and if not, the process returns to step SP306. This release is performed by operating a predetermined operation key provided on the setting operation unit 76 attached to the control unit 705 of the external rewriter 200, for example.
[0126]
[Modification]
The present invention includes the following modifications and implementation.
(1) The storage contents to be rewritten, the storage contents stored in each storage area of FIG. 2, and the divided storage area portion, for example, the control processing program for heat source machine control, for example, the first program Control processing is performed so that only one of the divided program parts such as the part, the second program part, and the third program part is rewritten, or all the storage areas except the storage area for which rewriting is prohibited are performed once. The control process is performed so that the rewriting process is performed.
[0127]
(2) The connection portion 87C, the communication I / F 78 connected thereto, and the communication path 82 are removed, and the connection portion 87D of the operation device 30 is connected to the communication path 81, and the terminal Vp2 / OUT is connected to the communication path 82. And an additional conducting wire for connecting the terminal Vp2 / IN, and a connecting portion 87X that is the same as the connecting portion 87X is connected in parallel at any one of the connecting portions 87A, 87B, and 87D. By connecting the connection portion 87E to the connection portion 78X, the control / data flash memories of the control units 701, 702, and 703 of the heat source unit 10, the indoor unit 20, and the operation unit 30 are connected via the communication path 81. The stored contents of 72A are configured to be rewritten in the required sequence.
[0128]
(3) The configuration is applied to the centralized control panel 50 or the distributed arrangement type air conditioner 100 having a configuration in which a central controller having a simple control function is provided.
(4) The control / data flash memory 72B of the external rewrite device 200 is changed to a normal ROM, and is mounted so as to be replaceable using a socket, and the master of the storage contents used for rewriting is rewritten with a ROM writer. To be configured.
[0129]
(5) When the communication speed is not changed in the configuration in which the communication speed is fixed, for example, the terminal RTS and the terminal CTS in the connection portion 87E in FIG. The communication is performed by operating a switch provided between these terminals to short-circuit the switch.
[0130]
【The invention's effect】
According to the present invention, as described above, the voltage used for rewriting the flash memory, that is, the erase / write voltage is applied from the external rewrite device side to perform the rewrite processing. The memory contents of the flash memory will not be rewritten due to miscommunication in the above communication, so even if the control device is configured using the flash memory, the memory contents will be rewritten erroneously, causing runaway control. , There will be no risk of accidents.
[0131]
Also, in the case where each control unit is distributed and separated like a distributed arrangement type air conditioner, carry a portable external rewrite device and simply connect it to the communication connection part. There is a feature that the control processing function of each arranged device can be updated with the latest type by simply rewriting the contents stored in the flash memory.
[Brief description of the drawings]
In the drawings, FIGS. 1 to 13 show an embodiment of the present invention, and FIGS. 14 to 16 show the prior art. The contents of each figure are as follows.
FIG. 1 is a general block diagram.
FIG. 2 is a configuration diagram of main parts storage.
FIG. 3 is a block diagram of the main part.
FIG. 4 is a flow chart of main part control processing.
FIG. 5 is a configuration diagram of main part storage.
FIG. 6 is a signal configuration diagram of the main part.
FIG. 7 is a block diagram of the main part communication.
[Fig. 8] Main part signal configuration diagram
[Fig. 9] Main part communication configuration diagram
FIG. 10 is a block diagram of the main part storage.
FIG. 11 is a configuration diagram of main part storage.
FIG. 12 is a schematic diagram of a signal configuration of a main part.
FIG. 13 is a block diagram of the main part communication.
FIG. 14 is an overall block configuration diagram.
FIG. 15 is a block diagram of the main part.
FIG. 16 is an overall configuration perspective view.
[Explanation of symbols]
10 Heat source machine
11 Compression unit
12 Heat exchanger
12A blower
13 Channel switching part
20 indoor units
21 Heat exchanger
21A blower
30 Controller
50 Central monitoring and control panel
70 CPU
71 I / O port
72 Processing memory
72A flash memory
72B flash memory
73 Working memory
74 Data memory
75 Clock circuit
76 Setting operation section
77 Display
78 Communication I / F
81 communication path
82 communication channel
83 pipeline
84 Air-conditioned rooms
85 Voltage switching
86 Power supply
87A connection part
87B connection part
87C connection part
87D connection part
87E connection part
88 power supply
89 Voltage switching
100 Distributed air conditioner
700 Control unit
701 control unit
702 Control unit
703 Control unit
705 control unit
D1 Temperature detector
D1A Indoor temperature value
D2 Temperature detector
D2A heat exchanger temperature value
T1 target temperature value
V2 Flow control valve
V2A drive part
Vp1 read voltage
Vp2 erase / write voltage

Claims (8)

A flash memory CPU type control device having a control unit provided with a function of performing rewriting of stored contents in a required part of a flash memory based on communication from an external rewrite device,
A first connection line for transmitting a voltage used for the rewriting (hereinafter referred to as a rewriting voltage) from the external rewrite device side to the flash memory CPU type control device side and a flash memory CPU type control device side are provided. By switching the voltage switching circuit, the rewrite voltage itself applied to the flash memory is used as a signal to the effect that the rewrite voltage is applied to the flash memory. A connection line including a second connection for transmitting to the side, and a third connection line for transmitting a data signal for rewriting from the external rewrite device side to the flash memory CPU type control device side Connecting means for connecting the external rewrite device and the flash memory CPU type control device;
Based on the switching of the voltage switching circuit, when the rewrite voltage itself is transmitted to the external rewrite device side, the data signal for rewriting is transmitted from the external rewrite device side to the flash memory CPU type control device side. A flash memory CPU type control device. A clock having a least common multiple / frequency for a plurality of predetermined communication speed frequencies (hereinafter referred to as a source clock) is generated, and a received signal obtained by performing the communication in an asynchronous communication is used as the source clock or the source clock. 2. The flash memory CPU according to claim 1 , further comprising a communication speed setting means for setting a communication speed suitable for the rewriting by sampling a clock obtained by dividing the clock and determining a communication speed. Mold control device. Rewriting storage means for rewriting the entire stored content or only a part of the required portion by dividing the storage area of the flash memory into a plurality of areas and adding the version information to the stored contents stored in the area 2. The flash memory CPU type control device according to claim 1, wherein: The determination unit according to claim 1 , further comprising: a determination unit configured to determine whether or not the rewrite has been normally performed based on whether or not a total value of storage addresses of the rewritten portions is a predetermined value . Flash memory CPU type control device. A heat source device for supplying at least a heat source for air conditioning to a flash memory CPU type control unit having a control unit provided with a function of performing rewriting of stored contents in a required part of the flash memory based on communication from an external rewrite unit And a distributed arrangement type air conditioner provided in the indoor unit,
A first connection line for transmitting a voltage used for the rewriting (hereinafter referred to as a rewriting voltage) from the external rewrite device side to the flash memory CPU type control device side and a flash memory CPU type control device side are provided. By switching the voltage switching circuit, the rewrite voltage itself applied to the flash memory is used as a signal to the effect that the rewrite voltage is applied to the flash memory. A connection line including a second connection for transmitting to the side, and a third connection line for transmitting a data signal for rewriting from the external rewrite device side to the flash memory CPU type control device side Connecting means for connecting the external rewrite device and the flash memory CPU type control device;
Based on the switching of the voltage switching circuit, when the rewrite voltage itself is transmitted to the external rewrite device side, the data signal for rewriting is transmitted from the external rewrite device side to the flash memory CPU type control device side. A distributed arrangement type air conditioner characterized by comprising: A clock having a least common multiple / frequency for a plurality of predetermined communication speed frequencies (hereinafter referred to as a source clock) is generated, and a received signal obtained by performing the communication in an asynchronous communication is used as the source clock or the source clock. 6. The distributed arrangement type according to claim 5 , further comprising communication speed setting means for setting a communication speed suitable for the rewriting by sampling with a clock obtained by dividing the frequency and determining a communication speed. Air conditioner. Rewriting storage means for rewriting the entire stored content or only a part of the required portion by dividing the storage area of the flash memory into a plurality of areas and adding the version information to the stored contents stored in the area The distributed arrangement type air conditioner according to claim 5 . 6. The determination unit according to claim 5 , further comprising: a determination unit configured to determine whether or not the rewrite has been normally performed based on whether or not a total value of storage addresses of the rewritten portions is a predetermined value . Distributed air conditioner.

Images