JPH081325B2 - Air conditioning control device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention distributes a judgment and control function for locally controlling each air conditioner to each of a plurality of terminal controllers for transmitting and receiving data to and from a main controller, and also for controlling each terminal. Air conditioner control device for small stores, refrigerated warehouses, buildings, etc. that monitors changes in various states of air conditioners that are controlled by air conditioners and sends state change information to the main controller in response to occurrences It is a thing.

[0002]

2. Description of the Related Art Conventionally, in this type of air-conditioning control device, a main controller is constructed by using a personal computer or the like, and terminal devices such as a keyboard and a CRT are connected, and data is transmitted / received to / from these devices so that an operator operates Can be freely input and output to the operator, and is connected to a communication interface by a transmission line so that predetermined data can be transmitted to and received from the communication interface. ing.

Further, the communication interface is connected to a plurality of terminal controllers by a common transmission line, and relays data transmission / reception between these terminals and the main controller as required. Each terminal controller is connected with a temperature sensor as a local sensor, a humidity sensor, a status contact of a fan motor, various alarm signal contacts, and the like.
Motor control valves and electromagnetic switches for controlling various air conditioners are connected, and each terminal controller controls based on the status of the fan motor status contact and data transmission / reception with the communication interface. By sending the control output to the motor control valve, electromagnetic switch, etc., the control for each air conditioner (such as PID control at room temperature) is locally performed, and the main controller goes down. However, we are trying not to create a general out-of-control situation.

Further, each terminal controller monitors whether the measured temperature or humidity does not deviate from the set range or whether the status contact has changed, and changes the status (COS: change of status) according to the change. ) Data is created and transmitted to the main controller, and the main controller that receives this COS data sends it to the CRT, PRT which is the terminal of the main controller.
The data is output to the (printer) and is stored in the memory as COS historical information (for example, at what time and what changed from ON to OFF).

In this main controller, the contents of COS output to the CRT and PRT are information that requires urgent response (for example, abnormal stop of air conditioner, occurrence of fire, etc.) or the system is permanent. It is used to diagnose whether information for normal normal operation (for example, runtime COS, maintenance information due to operation of the device for a certain time or longer).

Further, the COS historical information stored in the memory of the main controller (for example, hard disk; HD, floppy disk; FD) can be output to the CRT or PRT which is the terminal device at any time, and the COS can be output. It is used to refer to the history of the system and as diagnostic data on whether the system is operating efficiently.

[0007]

In the above-mentioned conventional air conditioning control device, the COS generated in all terminal controllers.
When the main controller receives the data, it receives the data through the transmission path, and the CRT or PRT, which is the terminal of the main controller, receives the COS.
The data is output, the operator confirms the content and takes necessary action, and the COS data is automatically stored in the memory as COS historical data.

When the terminal controller sends COS data to the main controller and the system has a trouble (for example, trouble of the main controller, communication system trouble, temporary local power trouble, etc.), this COS data Cannot be received by the main controller, and all COS data generated during the trouble disappears.

Therefore, even after the trouble is recovered, the main controller cannot confirm the COS data generated during the trouble, and the operator cannot properly deal with the COS data generated during the trouble. C in progress
There is a problem that the OS data is missing some COS historical information.

Therefore, in view of the above-mentioned conventional problems, the present invention allows each terminal to operate even if a trouble occurs in the main controller or a communication system between the main controller and the terminal controller occurs. the state change occurs in the control unit by storing as COS historical data to each terminal controller, transmitting the COS His bets helical information with the main controller after the trouble eliminated from the terminal controller for all hands to the terminal controller The COS data during the trouble is read to the CRT and PRT, and the operator can confirm the contents of the COS data generated during the trouble. At the same time, the COS data during the trouble is reported to the memory of the main controller. The purpose of the present invention is to provide an air-conditioning control device that can be collected and stored as.

[0011]

In order to achieve the above-mentioned object , an air conditioning control device made according to the present invention has a main controller 1 via transmission lines L1 and L2 as shown in the basic configuration diagram of FIG.
And each of the plurality of terminal control unit 4 ₁ to 4 _n to perform data transmission and reception, locally as well as distribute the decision and control functions to control each type of air-conditioner, each of the terminal controller 4 ₁ to 4 _n is controlled An air-conditioning control device configured to monitor changes in various states of a target air conditioner and to transmit state change information to the main controller 1 via the transmission lines L1 and L2 in accordance with occurrence of the changes. , The main controller 1 uses the transmission line L
1, L2 has been restored and changed from offline to online
When an information collection request is sent via the transmission line
And a terminal requesting means 1a-1 and each of the terminal controllers 4 ₁ to 4
_n has a storage means 4c for storing state change information added with the generated time information each time the status change occurs, the
From the main controller 1 received via the transmission lines L1 and L2
The state change information stored in the storage means 4c is transmitted to the main controller 1 in response to the information collection request .

[0012]

With the above configuration, the state change information added with the occurrence time information each time a state change occurs is stored in the storage means 4c of each of the terminal controllers 4 ₁ to 4 _n , and the transmission is performed.
Roads L1 and L2 are restored and changed from offline to online
Then, the information collection requesting means 1a-1 of the main controller 1
Recovery information collection request transmitted via the transmission lines L1 and L2
When each of the terminal controllers 4 ₁ to 4 _n receives the message, the state change information stored in the storage means 4 c is transmitted to the transmission line L.
1 to L2 to the main controller 1.

Therefore, the transmission line L is caused by some cause.
1, L2 goes from online to offline, main control
Each terminal controller vessel 1 for each occurrence of a state change from 4 ₁ to 4 _n
It is possible to receive and store the transmitted state change information.
Even if it becomes impossible, each terminal controller 4 ₁ to 4 _n
Is the occurrence time information each time a state change occurs in the storage means 4c.
The state change information added with the
When L1 and L2 are restored, recovery of information from the main controller 1
Status change information stored in the storage means 4c in response to a collection request.
The main controller 1 is turned off because it sends the information.
Each terminal controller 4 ₁ to 4 _n not collected during the line
Surely collects the status change information at the time of restoration of the transmission lines L1 and L2.
You can gather.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is an overall configuration diagram showing an embodiment of an air conditioning control device according to the present invention. In FIG. 2, the main controller 1 is provided in a machine monitoring room of a building, which includes a keyboard, a CRT, a printer, A terminal device 2 such as an external memory (hard disk; HD, floppy disk; FD) is connected, and data is transmitted and received to and from the terminal device to input data by an operator and output data to the operator. The main controller 1 is connected to the communication interface 3 via the transmission line L1 and transmits predetermined data to the communication interface 3 and receives data from the communication interface 3.

The communication interface 3 is a common transmission line L.
2 connects to a plurality of terminal controllers 4 _{1 to} 4 _n and relays data transmission / reception between these terminals and the main controller 1. Each terminal controller 4 ₁ to 4 _n, the temperature sensor 5 as local sensors, status contacts of the humidity sensor 6 and the fan motor 7, together with various alarm contact is connected, order to control each air conditioner conditions such as motor control valve 8 and the electromagnetic switch 9 is connected, the status contacts of each of the detection output and the fan motor 7 of each terminal controller 4 ₁ to 4 _n is the data transmission and reception and the sensors 5 and 6 and the communication interface 3 Based on the above, a control decision is made and a control output is sent to the motor control valve 8, the electromagnetic switch 9 and the like, thereby locally controlling each air conditioner. The communication interface 3, for the air-conditioning control is for relaying to do by the main controller 1 and each terminal controller 4 ₁ to standard protocols for data transmission and reception between 4 _n .

FIG. 3 is a block diagram showing the configuration of the main controller 1. A fixed memory 1 composed of a ROM, centering on a processor 1a such as a microcomputer (CPU).
b, variable memory 1c composed of RAM, programmable interval timer (PIT) 1d, real time clock (RT
C) 1e, serial input / output (SIO) 1f, floppy disk controller / hard disk controller (F
DC / HDC) 1g, CRT controller (CRTC)
1h, arranged by the printer controller (PRTC) 1i,
These are connected by a bus 1j. The processor 1a executes an instruction according to a control program stored in advance in the fixed memory 1b, and transmits / receives data to / from the communication interface 3 via the serial input / output 1f and terminal controllers 4 _{1 to} 4 _n via the communication interface 3. The transmission / reception data of 1 is accessed to the external memory or the variable memory 1c as necessary.

FIG. 4 is a block diagram showing the configuration of the terminal controllers 4 _{1 to} 4 _n , which, like the main controller 1, also has a fixed memory 4b consisting of a ROM, mainly a processor 4a as a control unit. A variable memory 4c including a RAM, a programmable interval timer (PIT) 4d, a real time clock (RTC) 4e, a serial input / output (SIO) 4f, and an interface (IF) 4g are arranged, and these are connected by a bus 4h.

The processor 4a executes instructions in accordance with a control program stored in the fixed memory 4b, transmits / receives data to / from the communication interface 3 via the serial input / output 4f, and digital data from each sensor and status contact via the interface 4g. The input DI and the analog data input AI are received, the digital data output DO and the analog data output AO are sent to each control part, and the required data is accessed to the variable memory 4c. The processor 4a makes a control judgment according to the data DI, AI and the transmission / reception data indicating the detection output of each sensor and the status of the status contact, and each data output D
O and AO are sent as control outputs.

Further, the processor 4a monitors all the digital data DI from the status contacts at regular time intervals,
As a result of this monitoring, when the status of the status contact changes from the previous status, it is assumed that COS occurs each time, the occurrence time, the point address indicating the position of the contact where the COS occurred, and the status thereof. 5 is stored in a predetermined area in the variable memory 4c, and the internal point address and status of the data stored in the variable memory 4c is sent out from the SIO 4f as COS data, and is transmitted via the communication interface 3 to the main unit. Send to controller 1. On the other hand, the main controller 1 receiving this COS data
A material obtained by adding the reception time to the received data PRTC1
i, output to PRT and CRT via CRTC 1h, and stored in a predetermined area of external memory (floppy disk; FD or hard disk; HD) or variable memory 1c via FDC / HDC 1g.

FIG. 6 is a flowchart showing the control operation by the processor 1a of the main controller 1. The operation is started by turning on the power or recovering from a power failure, and the first step S
Initialize the initial settings with 1 and continue with step S2
Then, the COS data collection request message addressed to all the terminal controllers 4 _{1 to} 4 _n is sent from the serial input / output 1f to the communication interface 3. This allows the communication interface 3 transmits the COS data collection request message via the bus 1g to each terminal controller 4 ₁ to 4 _n.

[0021] Subsequently, the main controller have rows various processing proceeds to step S3, then the communication routine proceeds to step S4 to determine whether it is from offline to online, when the determination is NO, i.e. offline Alternatively, if the user is still online, return to step S3, and go to step S3.
Steps S3 and S4 are repeated until the determination of 4 becomes YES. When the determination in step S4 is YES, that is, when the communication line is restored, the process proceeds to step S5, and similarly to step S2, the COS data collection request as the information collection request addressed to all the terminal controllers 4 _{1 to} 4 _n. Message from serial input / output 1f to communication interface 3
, And then returns to step S3. This step
By executing S5, the processor 1a causes the transmission lines L1, L2
Information when is restored and goes from offline to online
Information collection requesting procedure for transmitting a collection request through the transmission path
Working as Step 1a-1.

FIG. 7 is a general flow chart showing the control operation by the processor 4a of the terminal controllers 4 _{1 to} 4 _n. The operation is started by turning on the power or recovering from the power failure, and the initial setting initialization is performed in the first step S11. After that, various processes are repeated in the subsequent step S12.
In these various processes, digital data input DI capture and analog data input AI capture, time schedule control, level control, upper and lower limit monitoring, optimum start control, adjustment control, etc. are performed, and digital data output DO transmission and The analog data output AO is transmitted. In addition, the occurrence of COS is monitored and CO
The COS message creating process for creating and storing the S message and the COS data transmitting process for the COS data collection request are also performed.

FIG. 8 shows a flow chart of the COS message creating process. In this process, first, step S12a is performed.
At, the state of the status contact connected through the interface 4g is sampled at a predetermined constant cycle. After that, the process proceeds to step S12b, where the data sampled this time is compared with the data sampled last time, and as a result, it is determined whether COS has occurred depending on whether the data has changed. Step S1
When the determination in 2b is NO, the process returns to the flowchart of FIG.

When the determination in step S12b is YES, the process proceeds to step S12c, where a COS transmission message including the point address of the status contact with COS and its state is created, and the created COS transmission is sent in step S12d. Serial message input / output 4f
Sent from. Then proceed to the subsequent step 12e,
Here, the current time data from the data RTC 4e is added to the data including the point address and the state shown in FIG.
7 is created and stored in a predetermined area of the variable memory 4c, and then the process returns to the flowchart of FIG.

FIG. 9 shows a flow chart of the COS data transmission process. In this process, first, step S12.
At f, it is determined whether or not a COS transmission request message is input to the serial input / output 4f. When the determination in step S12f is NO, the process returns to the flowchart of FIG. 7, and when the determination is YES, the process proceeds to step S12g and the COS data is stored one by one on the basis of the COS data stored in the variable memory 4c.
Create OS transmission message. After that, the process proceeds to step S12h, where the COS transmission message created in step S12g is transmitted from the serial input / output 4c.

Then, the process proceeds to step S12i, in which C for the COS data stored in the variable memory 4c is set.
It is determined whether or not the transmission of the OS message is completed, and when the determination in step S12i is NO, the above step S12 is performed.
Returning to step g, steps S12g to S12i are performed in step S
Repeat until the determination of 12i is YES. Step S
When the determination of 12i is YES, the process returns to the flowchart of FIG.

As described above, in the present embodiment, each terminal controller 4 _{1 to} 4 _n monitors each status contact and outputs CO.
It is determined whether or not S has occurred, and according to the occurrence of COS, COS data including a ponto address and a state is transmitted to the main controller 1 as in the conventional case, and the time of occurrence is added to this COS data. It is stored in the variable memory 4c. In addition, when the main controller 1 is turned on or restored, or when the communication line is turned from off to on, COS is performed on all the terminal controllers 4 _{1 to} 4 _n .
A data collection request message is transmitted, and in response to the reception of this COS data collection request message, the data stored in the variable memory 4c by each of the terminal controllers 4 _{1 to} 4 _n is transferred to the main controller 1. It is supposed to be sent to.

[0028] Therefore, the main controller 1 is cause any trouble to himself and the communication interface 3, when the reception of the COS data from each terminal controller 4 ₁ to 4 _n becomes impossible, depending on the resolution of problems The COS data stored in the variable memory 4c of each terminal controller 4 _{1 to} 4 _n is collected and cannot be received during the trouble.
You will be able to supplement the data.

In the illustrated embodiment, the COS data collection request message from the main controller 1 is automatically transmitted at a specific time point, but this may be manually performed at an arbitrary time point. .

As the COS data, in addition to the above-mentioned data, the runtime COS (DI is closed for a certain time (operation)
COS) and analog H / LCOS (COS due to the analog measured value exceeding either the upper limit, the lower limit, or the upper limit of the set value).

[0031]

As described above, according to the present invention, a trouble occurs in the main controller or a trouble occurs in the communication system between the main controller and the terminal controller, and the main controller is Even if the status change information sent from each terminal controller at each occurrence is received and cannot be output to the CRT or PRT and stored, the main controller occurs during trouble and the occurrence time at each terminal controller. The state change information that has been added with information and stored is automatically collected after the trouble is resolved to ensure the accuracy.
It is possible to guarantee, never CRT, can not be output to and collected PRT main controller of the state change information that occurred during the trouble.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of an air conditioning control device according to the present invention.

FIG. 2 is a diagram showing an embodiment of an air conditioning control device according to the present invention.

FIG. 3 is a diagram showing a configuration of a main controller in FIG.

FIG. 4 is a diagram showing a configuration of a terminal controller in FIG.

5 is a diagram showing data contents stored in a variable memory in FIG.

FIG. 6 is a flowchart showing a control operation of the processor in FIG.

FIG. 7 is a flowchart showing a control operation of the processor in FIG.

FIG. 8 is a flowchart showing details of a part of FIG. 7;

FIG. 9 is a flowchart showing other details of a part of FIG.

[Explanation of symbols]

1 Main Controller 1a-1 Information Collection Request Means (Processor) 4 ₁ to 4 _n Terminal Controller 4C Variable Memory (Storage Means) L1, L2 Transmission Line

Claims (1)

[Claims] 1. A determination and control function for locally controlling each air conditioner is distributed to each of a plurality of terminal controllers that perform data transmission / reception with a main controller via a transmission line, and each terminal control is performed. In the air conditioning control device, which monitors changes in various states of the air conditioner that is the control target, and transmits state change information to the main controller via the transmission path in accordance with the occurrence thereof, When the main controller is offline after the transmission line is restored
When you go online, send an information collection request through the transmission line.
And has information collection request means for transmitting, each terminal controller has a storage means for storing the status change information which the status change is obtained by adding the generated time information to each generation, via the transmission path Received from the main controller
An air conditioning control device, characterized in that the state change information stored in the storage means is transmitted to the main controller in response to the information collection request .