JPH056958B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a remote control system for remotely controlling a load by connecting a central control device and a terminal device with a pair of signal lines, and time-division multiplexing transmission of control data, monitoring data, etc. It relates to a supervisory control system.

[Background Art] Conventionally, when a load is remotely monitored and controlled by a host computer, as shown in FIG. 121 to directly control the loads L ₁ to Ln (for example, U.S. Pat. No. 4,213,182)
It was hot. That is, the host computer 110
includes a CPU 111 that performs arithmetic processing, a ROM 112 that stores system programs, a RAM 113 that stores user programs, an I/O 114 that inputs and outputs data, a data memory 115 that stores supervisory control data, and a clock generation circuit. 1
16 and a power supply circuit 117,
Program for controlling and monitoring loads L ₁ to Ln
The program is stored in the RAM 113, and the CPU 111 executes this program to determine the load L ₁ based on the supervisory control data stored in the data memory 115.
~In addition to creating control and monitoring data for Ln,
I/O 114 and transmission interface 120
A signal for controlling and monitoring the loads L ₁ to Ln is transmitted and received via the terminal. On the other hand, the terminal device 121
Then, the host computer 110 receives the signal transmitted via the transmission interface 120.
Load control or load monitoring is now performed based on commands from the government.

However, in such conventional examples,
Since the transmission interface 120 of the monitoring and control system is directly controlled by the host computer 110, if the host computer 110 goes down for some reason, the entire remote monitoring and control system will go down. ,load
There was a problem in that it became impossible to monitor and control L ₁ to Ln. In addition, since multiple host computers 110 cannot be easily connected to the transmission interface 120 of the remote monitoring and control system, load
There was a problem that L ₁ to Ln could not be controlled from multiple locations.

[Object of the Invention] The present invention has been made in view of the above points, and its object is to enable load monitoring and control from multiple locations by arbitrarily connecting external control devices; Moreover, it is an object of the present invention to provide a remote monitoring and control system in which the entire load monitoring and control system does not go down even if an external control device goes down.

[Disclosure of the Invention] (Configuration) The present invention connects a central control device and a large number of terminal devices having unique addresses by a pair of signal lines,
The central control unit sends a transmission signal that transmits address data for accessing each terminal, control data for controlling the load, and a return standby signal for setting the return period for monitoring data from the terminal, and connects the central control unit and each terminal. In a remote monitoring and control system in which monitoring data and control data are time-division multiplexed between devices, data transmission between an external control device such as a host computer and a central control device is carried out via signal lines. An external interface terminal that performs time-division multiplex transmission is provided, and data transmission between the external interface terminal and the central control unit is performed by interrupt processing.

Embodiment 1 FIG. 1 is a diagram showing a schematic configuration example of a remote monitoring and control system according to the present invention.
A plurality of monitoring terminal devices 2 and control terminal devices 3 each having a unique address are connected to each other by a pair of signal lines 4, and a signal line 4 is connected from the central control device 1 to
The transmission signal Vs sent out is a start pulse signal indicating the start of signal transmission, as shown in Figure 2a
ST, mode data signal MD indicating signal mode,
Address data signal to call terminals 2 and 3
AD, control data signal CD to control loads L ₁ ~ _{L 4} ,
Checksum data signal CS and terminals 2 and 3
This is a bipolar (±24V) time-division multiplexed signal consisting of a return standby signal WT that sets the return period from the WT, and data is transmitted by pulse width modulation. In each terminal device 2, 3, when the address data of the transmission signal Vs received via the signal line 4 matches its own unique address data, it takes in the control data of the transmission signal _Vs , and also takes in the control data of the transmission signal _Vs. The monitoring data signal is returned as a current mode signal (a signal sent by short-circuiting the signal lines 4 via an appropriate low impedance) in synchronization with the return standby signal WT.

The central controller 1 also has a mode data signal.
A dummy signal transmitting means that constantly sends out a dummy transmission signal Vs with the MD in dummy mode, and an interrupt occurring when an interrupt signal Vi as shown in FIG. Interrupt processing means is provided for detecting the terminal device 2, accessing the terminal device 2, and causing the monitoring data to be sent back. On the other hand, when the monitoring terminal 2 receives a monitoring input due to the operation of the switches _S1 to _S4 , it generates an interrupt signal Vi in synchronization with the start pulse signal ST of the dummy transmission signal Vs, and Interrupt generation means for returning its own unique address data in synchronization with the return standby signal WT of the address confirmation mode transmission signal Vs from the central control device 1, and an interrupt access mode transmission signal in response to the interrupt from the central control device 1. Data return means is provided for returning monitoring data corresponding to the monitoring input when Vs is transmitted. In addition, the central control device 1 creates control data to be transmitted to the control terminal device 3 based on the monitoring data sent back to the central control device 1 from the monitoring terminal device 2, and also transmits it to the control terminal device 3. and load L ₁
~L ₄ has come to be controlled. The control terminal 3 installed in the distribution board 6 or the relay control panel 6a has the dimensions agreed upon in the distribution board agreement.
The control output controls a remote control relay 5 for load control (a latching relay that can be turned on and off using a hand switch). Furthermore, by providing the central control device 1 with a delay timer function that performs load control after a fixed time delay from switch operation, the lighting load can be turned off in a delayed manner using the normal monitoring terminal 2. Furthermore, if the dimming data is stored in correspondence with the switch, the lighting load can be dimmed and controlled using a normal monitoring terminal.

FIG. 3 shows the circuit configuration of the control terminal device 3. The control terminal device 3 includes a power supply circuit 10 that forms a circuit power supply from the transmission signal Vs transmitted via the signal line 4, and a transmission signal Vs. A signal processing circuit 11 receives and performs signal processing, and also forms and transmits a return signal _VB , and an address setting section 12 that sets a unique address, and when controlling one load, controls four circuits. A circuit number setting unit 13 that sets which circuit to control the load from among the circuits (corresponding to 4 control data bits), a drive circuit 14 that drives the relay circuit 15 for load control, and an operating state. The signal processing circuit 11 detects a match between the address data of the transmission signal Vs and the unique address, takes in the control data when the address match is detected, and sends it to the circuit number setting section 13. A control output is formed based on the bit selected by the output relay 15.
At the same time, based on the load monitoring input inputted through the monitoring circuit 16, return monitoring data is formed and sent back to the central control unit 1 using a current mode return signal _VB . Note that without providing the circuit number setting section 13 in the control terminal 3,
It goes without saying that the relay circuit 15 may be formed so that each bit of the control data controls the load, thereby forming a four-circuit control circuit.

4 and 5 show the monitoring terminal 2, whose circuit configuration is approximately the same as that of the control terminal 3, and the monitoring circuit 16 switches S ₁
The state of the switch is monitored, and based on this switch monitoring input, monitoring data is formed in the signal processing circuit 11 and sent back to the central control unit 1 through the above-mentioned interrupt processing, and the operation display circuit 15' Light-emitting diodes LD ₁ and LD ₂ for ON and OFF indications
is made to blink based on control data (indicating the operating state of the load) transmitted from the central control device 1. Furthermore, when setting a unique address using the deep switch in the address setting section 12, the lower 6 bits of the 8-bit address data can be set by the user as appropriate, and the upper 2 bits can be set by the manufacturer for the terminal device type (for monitoring). , control) settings, and both terminals 2 and 3 can be easily matched by simply setting the user setting section of the unique address of the monitoring and control terminals 2 and 3 to the same value.
The load L ₁ connected to the control terminal 3 can be controlled based on the monitoring data of the switch S ₁ returned from the monitoring terminal 2 set to the same value. Note that when the monitoring terminal device 2 is configured to monitor the switch states of a plurality of switches S ₁ , S _{2 .} , S ₂ . . . Further, the monitoring terminal device 2 for monitoring the switch status of the pattern control switch has the same configuration as the above-mentioned individual control switch.

Hereinafter, a case will be described in which a plurality of distributed loads are controlled by a plurality of control terminals 3, each of which is assigned the same address.
Currently, the same address is assigned to multiple terminals 3, and the circuit number setting section 13 sets which control circuit of the terminals 3 the load is connected to, and the return standby signal WT The set return period T _B is divided into a plurality of parts and assigned to each circuit, and the monitoring data from each terminal device 3 having the same address is returned in each divided return period T ₁ to T ₄ . There is. FIG _. 6 shows an example of dividing the return period T _B. As shown in FIG. 0,1))
(R ₀ , R ₁ , R ₂ , R ₃ ,
R ₄ , R ₅ , R ₆ , R ₇ ), and four divided return periods T ₁ to _{T 4} corresponding to the control circuits are set, respectively.
During these divided return periods T ₁ to _{T 4} , a return signal V _B pulse width modulated using the monitoring data is returned. Figure 6b shows an example of the return of monitoring data from the terminal device 3 in which the control circuit No. 1 is set, and the bit data is returned only during the divided return period T1 corresponding to No. ₁ . It's getting old.

FIG. 6c shows the return signal V _{B1 ~} returned from each terminal 3 when the same address is assigned to four control terminals 3 and loads are connected to different control circuits of each terminal 3. An example of the return signal V _{B '} (signal on signal line 4) which is a combination of V B4 is shown, and the return signals V _B1 to V _B4 from each terminal device 3 are returned in divided return periods T ₁ to T ₄ , respectively. This ensures that no interference occurs. Therefore, even if the same address is assigned to a plurality of terminal devices 3, a return error due to interference will not occur, and malfunctions will not occur. It goes without saying that in the same way, the same address may be set for multiple monitoring terminals 2 that monitor one switch, and the switch monitoring data may be sent back in divided return periods _T1 to _T4 . .

By the way, as mentioned above, multiple monitoring terminals 2
If the same address is set for the switch monitoring data to be returned in each divided return period T ₁ to _{T 4} , and the input latch is set to perform interrupt processing when the monitoring input changes, the same address When the monitoring inputs of the monitoring terminal 2 that are set change one after the other, an interrupt processing end signal for returning the data of the monitoring input that changed first will cause the monitoring input to change when the monitoring input that changed later changes. A problem arises in that the input latch that has been set is reset and the monitored input that changes later is ignored. Therefore, in this embodiment, the above problem is solved by providing an input latch having a bit corresponding to the monitoring input and resetting the input latch for each bit after the interrupt processing is completed.

That is, FIG. 7a shows the interrupt processing operation, in which the central controller 1 always transmits the dummy transmission signal.
Vs ₀ is sent to check whether or not the interrupt request signal Vi is sent from the monitoring terminal 2. Here, when the monitoring input of any of the monitoring terminals 2 changes, a predetermined bit of the input latch corresponding to the monitoring input whose input has changed is set to 1, and a dummy transmission signal Vs ₀ is transmitted from the monitoring terminal 2. Interrupt request signal synchronized with start pulse signal ST
Send Vi. Upon receiving this interrupt request signal Vi, the central control unit 1 immediately operates in an interrupt processing mode, and first sends out a transmission signal Vs ₁ in an address confirmation mode for identifying the interrupt requesting terminal 2. The transmission signal Vs ₁ in this address confirmation mode transmits the upper 4 bits of address data as address data for accessing the monitoring terminal 2, accesses 16 monitoring terminals 2 at once, and waits for the return. The lower 4 bits of the unique address are returned from the interrupt request terminal 2 during this period. When the lower 4 bits of the unique address are returned from the interrupt request terminal 2, the central control unit 1 combines the upper 4 bits of the address data transmitted by itself with the lower 4 bits sent back. Identify the 8-bit unique address of the interrupt request terminal 2, use this unique address as address data to send the interrupt access mode transmission signal Vs ₂ to access the interrupt request terminal 2, and receive the monitoring input from the interrupt request terminal 2. The bit data R0 to R7 as shown in FIG. 8a indicating the bits that have changed is sent back to confirm the bits that have changed. Next, the transmission signal Vs ₃ in the change confirmation mode is sent to confirm whether the changed bit has changed to the on side or the off side, and the interrupt request terminal 2 indicates the state of the monitoring input after the change. send the data back. Next, when the central control unit 1 receives this data, it sends out a reset mode transmission signal Vs ₄ to reset the input latch of the interrupt request terminal 2 and make it possible to accept the next monitoring input. Reset the latch.
At this time, in the embodiment, control data C0 as shown in _FIG .
~C7 (complement of bit data R0~R7) is transmitted, and only predetermined bits are reset (control data C
0 to C7 (reset the 0 bits). Furthermore, the bit data is returned again from the interrupt request terminal 2 whose input latch has been reset, and the central control unit 1 confirms that the input latch has been reset by the return of this bit data, and starts the above-mentioned interrupt processing. The monitor input capture operation is completed, and processing for controlling the load is performed based on the returned data. In addition, Fig. 7b
is a flowchart showing the monitoring control operation of the central control device 1.

By the way, as shown in FIG. 9, when the monitoring input of the first monitoring terminal 2 changes and the predetermined bit of the input latch is set to 1 and the above-mentioned interrupt processing is being performed, the same address is When the set monitoring input of the second monitoring terminal 2 changes, a predetermined bit of the input latch of the second monitoring terminal 2 becomes 1 and an interrupt request signal is generated.
It is set to the Vi sending state, but it is not accepted during interrupt processing due to a change in the monitoring input. On the other hand, at the end of the interrupt processing due to a change in the monitoring input, in the embodiment, the input latch is reset in bit units, and the reset signal sent when the interrupt processing for the first monitoring terminal 2 is completed. Since the predetermined bit of the input latch of the second monitoring terminal 2 is not reset by the mode transmission signal Vs ₄ , the interrupt request signal Vi continues to be sent from the second monitoring terminal 2. ing. Therefore, the central control device 1 immediately accepts the interrupt request from the second monitoring terminal 2 after finishing the reply processing of the change status of the monitoring input due to the interrupt request from the first monitoring terminal 2, and then receives the interrupt request from the second monitoring terminal 2. This interrupt processing causes the second monitoring terminal device 2 to return the state of change in the monitoring input. Therefore, there is no inactive period for interrupt processing, and even if the monitoring inputs of the monitoring terminals 2 at the same address change one after the other, the monitoring inputs that changed later are ignored. This prevents malfunctions due to monitoring inputs being ignored.

FIG. 10 shows a circuit configuration for preventing runaway of the CPU 1a forming the arithmetic processing section of the central control unit 1. The CPU 1a has a clock circuit CL.
Various arithmetic processing for time division multiplex transmission is performed based on the clock generated by It is outputting to the terminal. The count-up output of a counter CO which counts this time clock and is reset by a reset pulse is applied to an INT terminal (an input terminal for an initial signal (active low) for initializing the operating program) via a transistor Q. Here, the period of the reset pulse when time division multiplex transmission is performed normally is set shorter than the time from when the counter CO is reset until the count-up output is obtained, and during normal operation, No initial signal is output. On the other hand, if the CPU 1a goes out of control for some reason, the reset pulse will no longer be output, so the counter
When CO counts up, a count-up signal is applied to the INT pin as an initial signal, and the operating program of the CPU 1a is initialized.
It will automatically return to normal operation.

Next, a wireless system using optical communication will be explained. FIG. 11 shows a schematic configuration diagram of the entire wireless system, and the wireless transmitter 19 for transmitting optical wireless signals can be of a wall-hung type that is hung on the wall or a desk-mounted type that is placed on a desk. A plurality of wireless receivers 24 that receive optical transmission codes from the wireless transmitter 19 are installed on the ceiling 60. A unique address is set for each wireless transmitter 19, and from the perspective of the central control device 1, it is equivalent to the monitoring terminal 2, and for example, the transmission code for controlling on/off of lighting equipment is the first one.
It is transmitted as an optical wireless signal as shown in Figure 3a. This optical wireless signal transmission code is
As shown in FIG. 14, it consists of address data AD and control data CD. Here, the mode data SI that precedes the address data AD is data that selects whether to perform a linked operation with other systems such as a remote control device for time division multiplex transmission, or to perform an individual operation in the wireless system. It is. FIG. 16 shows a specific circuit example of the wireless transmitter 19, which includes an address setting section 35 for setting an address, a signal processing section 36 for creating a transmission code, a light emitting diode for transmitting the transmission code as an optical wireless signal, etc. It is composed of a light emitting section 37 and the like.

On the other hand, the wireless receiver 24 that receives the optical wireless signal includes, as shown in FIG. A tuning circuit 21 having a tuning function for detecting the carrier wave of the output signal from the optical receiver 20, and a baseband conversion section 22 that converts the output of the tuning circuit 21 into a baseband signal as shown in FIG. 13b. It is configured. Here, the baseband signal from the wireless receiver 24 is sent out on a dedicated signal line 23 and transmitted to the wireless relay terminal 7 and a plurality of individual receivers 28 connected to this signal line 23. The wireless relay terminal 7 constituting the wireless interface unit receives baseband signals from the wireless receiver 24 all at once, and as shown in FIG. 15, it includes a receiving unit 25 that receives the baseband signals,
A system in which address data and control data obtained by converting a baseband signal into a binary parallel signal at a receiving section 25 are inputted to a setting section 27 that selects whether the operation is linked to another system or an individual operation. It is composed of an interface 26 and the like.
This system interface 26 is connected to the transmission line 4 of the multiplex transmission control system, and is processed according to the procedure on the central control device 1 side. Baseband signal wireless relay terminal 7
The receiving unit 25 extracts only the signal format set, the setting unit 27 determines whether the system operation or individual operation is required, and the received address data and control data are output from the receiving unit 25 to the system interface 26.

Further, the individual receiver 28 is the wireless receiver 2
a receiving unit that receives the baseband signal from 4;
It consists of an address setting section for setting a unique address for each receiver, and a load interface that drives load control relays etc. using control data. It compares the baseband signal with the setting address of each individual receiver, and If it is, the load control relay or the like is driven by the load interface to control the load L' such as the above-mentioned lighting equipment.

Thus, the optical wireless signal transmitted from the wireless transmitter 19 is received by the nearest wireless receiver 24, the tuning circuit 21 detects only the signal of the determined frequency, and the baseband converter 22 converts the baseband signal into a baseband signal. and transmitted to the wireless relay terminal 7 and the individual receiver 28 via the signal line 28. Transmission code mode data
If the SI selects individual operation, the wireless relay terminal 7 does not respond and the individual receiver 28 becomes the target. The address of the baseband signal is checked in each individual receiver 28, and if it matches the set address, the load is controlled based on the control data. Here, if the mode data SI of the optical wireless signal from the wireless transmitter 19 selects system operation, the wireless relay terminal 7 will respond. That is, the address and control data obtained by converting the baseband signal into a binary parallel signal are input to the system interface 26, and data return processing is performed according to a predetermined procedure on the central control unit 1 side.

Here, the configuration of the wireless receiver 24 is as follows:
As shown in FIGS. 7 to 22, it includes a receiver base 41 to which the signal line 23 is wired and is attached to the ceiling 60, an optical sensor 20a consisting of three photodiodes, and a signal processing circuit (optical receiver). Part 2
0, a tuning circuit 21, and a baseband converter 22), and a detection head 42 that is fitted and attached to a receiver base 41. By inserting a pair of hook blades 43 into a pair of blade insertion holes 44 formed on the lower surface of the receiver base 41 and horizontally rotating the detection head 42, the hook blades 43 are inserted into the receiver base 41.
It is adapted to be engaged and connected to a hook connection terminal 45 inside. In this embodiment, a guide protrusion 46 is provided at the center of the upper surface of the detection head 42, and an insertion hole 47 into which the guide protrusion 46 is inserted is provided at the center of the lower surface of the receiver base 41. A hook blade 43 is protruded around the insertion hole 47, and a blade insertion hole 44 into which the hook blade 42 is inserted is provided around the insertion hole 47. The linear marker 48 provided on the detection head 42 corresponds to the markers 49a and 49b on the receiver base 41, so that the detection head 42 can be easily attached to the receiver base 41. By aligning the marker 48 with the marker 49a, the hook blade 43 faces the blade insertion hole 44, and the marker 48
By matching the marker 49a with the marker 49a, the hook blade 43 is reliably engaged and connected to the hook engagement terminal 45. In addition, in the embodiment, the shapes of the double-blade insertion holes 44 are different, and the hook blade 43 is
A triangular portion is provided at one end of the connector to facilitate connection polarity. In addition, in the embodiment, the plug blade insertion hole 44 and the guide insertion hole 4 are
7 are integrated.

Further, the printed circuit board 50 on which the main circuit of the signal processing circuit is mounted is provided with an opening 50a in the center, and a circuit that is sensitive to noise, that is, a light sensor 20a.
The circuit of the optical receiving section 20 having a preamplifier section that amplifies the weak signal output from the shield case body 52 is mounted on the second printed circuit board 51, and the protruding hole 52a of the optical sensor 20a is bored.
It is housed in a shield case 54 formed by a cover 53 having a protruding lead wire insertion hole 53a and arranged in the central opening 50a. In the embodiment, the optical sensor 20a is mounted on the second printed circuit board 51 via the third printed circuit board 51'.

FIG. 23 shows another embodiment, in which an auxiliary printed circuit board 54 is provided in order to mount the tuned coil 21a constituting the tuned circuit 21 on a printed circuit board 50, with the height of the coil 21a When the width dimension is small compared to the dimension, the thickness of the signal processing section formed by mounting components on the printed circuit board 50 can be made thinner than when the coil 21a is installed upright, and the thickness of the detection head 42 can be reduced. It is becoming possible to make the device thinner.

FIG. 24 shows the configuration of an external interface terminal 8 according to the present invention, which performs time-division multiplex transmission of data between an external control device 87 such as a host computer and the central control device 1.
A transmission signal transmitting/receiving section 80 that transmits and receives time division multiplexed transmission signals transmitted via the signal line 4, insulating sections 81a and 81b consisting of photocouplers that transmit signals in an electrically insulated state, and signal processing and judgment. a data storage unit 83 that stores the operating status of the remote monitoring and control system, a watchdog timer 84 that resets the CPU when the central control unit 82 goes out of control, and a data input/output unit 85.
a, 85b, bit serial data is input/output via the data input/output section 85a, and bit parallel data is input/output via the data input/output section 85b. In addition, in the embodiment, a condition setting means for freely changing transmission conditions such as baud rate and stop bit of bit serial data (RS232C standard in the embodiment) input and output via the data input/output unit 85a, and a data The central control section 82 is provided with transmission error prevention means for parity checking the data input via the input/output sections 85a and 85b.
The transmission conditions are established using switches Sb ₁ to Sb ₈ for setting the baud rate, switch Ss for setting the stop bit, and switches Sp ₁ and Sp ₂ for setting the parity.
and switch Sw for word length setting, and switch Sb ₁ to freely set the baud rate in 8 steps.
The switch state of ~ _Sb8 is taken into the central control section 82 via the encoder EC.

The operation of the external interface terminal device 8 will be explained below. Now, by connecting the computer main body 88 of the external control device 87 and the data input/output section 85a or 85b of the external interface terminal 8 via the interface 88, the external control device 87 and the external interface terminal 8 can be connected. Data is exchanged between the two. Here, in the external interface terminal 8, the transmission signal Vs transmitted via the signal line 4 is received by the transmission signal transmitting/receiving section 80, and the central control section 82 receives the transmission signal Vs transmitted via the signal line 4. The data is constantly monitored to determine the operating state of the load, the pattern control state, etc., and the load control state data is stored in the data storage section 83. next,
When the external control device 87 sends a status confirmation command to confirm the operating status of the remote monitoring and control system, the external interface terminal 8 decodes the command at the central control unit 82. Then, status data such as the load control status and pattern control status stored in the data storage unit 83 is sent back to the external control device 87. On the other hand, when a load control command is sent from the external control device 87 to individually control or pattern control the load of the remote monitoring and control system, the central control section 82 of the external interface terminal 8 decodes this command and A return signal that performs the same operation as the monitoring terminal 2 of the monitoring control system and returns the same monitoring data as when the individual operation switch or pattern control switch is pressed is transmitted from the transmission signal transmitting/receiving unit 80 to the signal line 4. to be sent to. That is, the external interface terminal 8 is configured to have a unique address set by a control command, monitor data of the switch state, and perform interrupt handling operations similar to the monitoring terminal 2. Therefore, in response to a pseudo switch operation performed on the external control device 87 side,
The same load control operation will be performed when the monitored switch in the remote monitoring and control system is pressed. Therefore, the external interface terminal 8 allows the remote monitoring and control system to operate in conjunction with the external control device 87, or
Local control operations, timer operations, pattern operations, etc. for controlling a plurality of systems using 7 as an upper control system can be easily performed, and control operations can be upgraded as desired. Also,
A pattern setting command can be sent from the external control device 87 to the external interface terminal 8 to change the settings of a control pattern for collectively controlling loads, and a setting confirmation command can also be sent to confirm the setting pattern. It's summery.

Furthermore, when the external interface terminal 8 confirms that the operating state of the load has changed, the external interface terminal 8 interrupts the external control device 87 and transmits the load change data. Then, the load operating state can be constantly monitored on the external control device 87 side.

On the other hand, the input/output data of the external interface terminal 8 can be either bit serial data or bit parallel data, so data can be easily exchanged with the external control device 87 without using a conversion interface. There is.
In addition, in the example, the baud rate (75 baud, 150 baud, 300 baud, 600 baud, 1200 baud, 2400 baud, 4800 baud,
9600 baud), stop bit (1 bit, 2 bit), parity (none, even, odd), word length (8 bit,
7 bits) and other transmission conditions (Sb ₁ to _{Sb 8} ,
Since a condition setting means is provided that can be changed freely with Ss, Sp ₁ , Sp ₂ and Sw, the switches Sb ₁ to _{Sb 8} ,
By setting the conditions with Ss, Sp ₁ , Sp ₂ , and Sw, it is possible to support input/output of various bit serial data, and all switches Sb ₁ to _{Sb 8} for setting the baud rate can be turned off. By doing so,
The switches Sb ₁ to _{Sb 8} are used to switch the data processing of the central control unit 82 to bit parallel data processing. Furthermore, in the embodiment, a transmission error prevention means is provided to prevent transmission errors of data input by parity check, so that system malfunctions due to data transmission errors are prevented. .
On the other hand, the bit parallel data is transferred to the data input/output section 8.
5b, a large amount of data can be input and output at high speed, and data can be input and output using a device having a simple data processing circuit.

FIG. 25 shows a time chart when bit parallel data is input/output by handshake between the external control device 87 and the data input/output unit 85b of the external interface terminal 8. When transmitting data from the control device 87, the strobe signal from the external control device 87 is set to "L" when the data to be transmitted by the external control device 87 is determined. When this strobe signal becomes "L", the data input/output section 85
b receives the transmission data from the external control device 87, and sets the strobe signal to "H" by setting the ACK signal to "L" when the data reception is completed.
and enters standby mode. In addition, the data input/output section 8
Data transmission from 5b to external control device 87 is also performed using a similar handshake.

26 and 27 show the external appearance of the external interface device 8. On the back panel of the case 90, there is a power switch 91, a connector 92 for bit serial data (for RS232C), and a connector 92 for bit parallel data. A connector 93 and a connection terminal 94 for the signal line 4 for time division multiplex transmission are provided, and the front panel is provided with a power indicator lamp 96, a transmission signal reception indicator lamp 97, and a data signal reception indicator lamp 98. There is. Note that the external control device 87 includes a main body 87a and a keyboard 87b.
and a display 87c, and in the embodiment, it is connected to the external interface terminal 8 via an RS232C cable 99. Note that the external interface terminal 8 is connected to an external control device 87.
Needless to say, it is also possible to integrate it by incorporating it as an interface board inside. Furthermore, an external interface terminal 8 for monitoring or control may be provided.

FIG. 28 shows the external interface terminal 8
is formed to operate as a terminal device for a plurality of remote monitoring and control systems X ₁ to Xn, and transmits data between the central control device 1 of each remote monitoring and control system X ₁ to Xn and the external control device 87. It is designed to perform division multiplex transmission, making it easy to construct large-scale systems.

FIG. 29 shows a complex configuration in which a port for inputting and outputting n-bit mode data Dm and a port for inputting and outputting m-bit transmission data Ds are provided as data input/output ports of the external interface terminal 8. The external control device 8 is designed to directly exchange data without using a data transmission method, and is formed from a simple digital circuit without using expensive equipment such as a computer.
It is now possible to monitor and control loads using . Figure 30 shows mode data Dm, transmission data
An example is shown in which Ds is 8 bits each, mode data Dm consisting of 2-digit hexadecimal data is channel data (corresponding to address data), and transmission data Ds is data for selecting a load to control.

FIG. 31 shows a block circuit diagram of a pattern setting terminal 9 which is equipped with a data input section 105 for inputting pattern control data and returns the input pattern control data to the central control unit 1. A transmission signal transmitting/receiving section 100 that transmits and receives time division multiplexed transmission signals transmitted through the transmitter, insulating sections 101a and 101 made of photocouplers that transmit signals in an electrically insulated state, and a central control section 102 that performs signal processing. , a data storage section 103 that stores input data or confirmation pattern control data sent from the central control device 1, and I/O sections 104a to 104c that confirm data input/output. The data set by the switch section 107 of the data input section 105 is taken in via the /O section 104a, and the set data is sent to the display control section 108. Furthermore, the data stored in the data storage section 103 can be outputted as appropriate via the I/O section 104b, and in the embodiment, the output data can be printed out using a data output section 105 consisting of a printer. ing. Note that each circuit other than the transmission signal transmitting/receiving section 100 of the pattern setting terminal 9 is supplied with power from the terminal power supply 106.

FIG. 32 shows a front view of the switch panel section of the data input section 105, in which load selection switches SWa, SWa', SWb, SWb', SW ₁ a~
SW ₁ d...SW ₁₆ a to SW ₁₆ d, block change switch SW ₂₀ that changes the selected block, and data set switch SW ₂₁ that stores the selected data.
, a data return switch SW ₂₂ for returning the stored data to the central control device 1, and a data transfer switch SW ₂₃ for transferring the pattern control data from the central control device 1 to the pattern setting terminal 9. In the figure, number setting switch SWc,
SWc' is a push button switch for inputting a pattern number or group number by up or down, and mode changeover switch _SW24 is a slide switch for changing over initial setting mode, confirmation mode, change mode, and normal mode. Clear switch SW ₂₅
are push button switches that clear the input data (load numbers (channel numbers in the illustrated example) displayed on the display sections DP ₁ to Dp ₁₆ , switches SW ₂₆ , SW ₂₇ ,
SW ₂₈ is a total pattern switch, floor pattern switch, and group switch for setting the type of pattern control data. Furthermore, the all-on switch SW ₃₀ , the all-off switch SW ₃₁ , and the all-outside switch SW ₃₂ are push-button switches that allow specific data input at the time of setting the total pattern with a single touch. In addition, the load numbers (channel numbers) of the control terminal 3 divided into four blocks are displayed on the display sections DP ₁ to DP ₁₆ , respectively: 0 to 15 ch, 16 to 31 ch, 32 to 47 ch, 48 to
63ch is now displayed.

The operation of the pattern setting terminal 9 will be explained below. When setting pattern control data from the data input section 105, the mode changeover switch _SW24 is set to the initial setting mode, and the type of pattern control is input using the switches _SW26 to _SW28 . Next, set the pattern number corresponding to the pattern switch using number setting switches SWc, SWc', select the block using block changeover switch _SW20 , and switch SWa, SWc'.
SWa', SWb, SWb' are used to set the terminal number (channel number) of the control terminal 3, and switches SW ₁ a to SW ₁ d...S ₁₆ a to _{SW 16} d are used to set each control terminal number. By setting the load circuit number to be turned on in the terminal device 3 and pressing the set switch SW ₂₁ , the pattern control data is stored in the data storage section 103. Pattern control data is input by repeatedly performing the above-described setting operation. By the way, when selecting the load to be turned on as described above, the number of the control terminal 3 of the block selected by the block changeover switch _SW20 is displayed on the display units _GP1 to _GP16 . That is,
If the first block is selected by operating block changeover switch SW ₂₀ , the terminal number 0 is selected.
The light emitting diode corresponding to ~15 lights up and the load circuits (4 circuits) with terminal numbers 0 to 15 are switched on.
SW ₁ a to SW ₁ d...SW ₁₆ a to SW ₁₆ d display the selectable items, and when the block selection switch SW ₂₀ is pressed to switch to the second block, the terminal numbers 16 to 16 are displayed. The light emitting diode corresponding to 31 lights up to indicate that the load circuit of the control terminal has been selected, and the switch SW ₁ a~
SW ₁ d...SW ₁₆ a to SW ₁₆ d are displayed to indicate that they can be selected. The same applies to the case where the block changeover switch SW ₂₀ is pressed to switch to the third and fourth blocks.

The pattern control data set as described above is sent back to the central control device 1 via the transmission signal transmitting/receiving section 100 and the signal line 4 by pressing the data transfer switch SW ₂₂ . The pattern control data is stored in a memory for storing pattern control data.

On the other hand, when confirming or changing the set pattern control data, first press the data transfer switch SW ₂₃ to transfer the data to the central controller 1.
The pattern setting terminal 7 sends a transmission request signal to transmit the pattern control data stored in the memory of the central controller 1, and the transmission signal transmitting/receiving section 100 receives the data transmitted from the central controller 1. The pattern control data is stored in the data storage unit 103.
to be memorized. Next, the pattern control data can be confirmed by outputting the data stored in the data storage section 103 to a printer. In addition, the switch section 1 is the same as in the initial setting.
The pattern control data can also be changed by operating 07, and if the changed pattern control data is sent back to the central controller 1 by pressing the data transfer switch SW ₂₂ , the memory in the central controller 1 can be changed. The pattern control data stored in the pattern control data is rewritten, and thereafter, the load is subjected to batch pattern control based on the changed pattern control data. It goes without saying that a switch may be provided to print out the pattern control data stored in the data storage section 103 by initial setting or modification.

As described above, in the embodiment, the pattern control data can be easily set and changed by operating the switch of the data setting section 105 of the pattern setting terminal 9, and the pattern control data is centrally stored. Since it is stored in the memory in the control device 1, it is possible to push on or push off multiple loads at once using a pattern control switch, and set the multiple loads to be turned on or off at once using each switch. The setting operation is simpler than that required in the conventional example, and the number of setting switches in the data setting means can be significantly reduced.

By the way, when the pattern control data is stored in the memory in the central controller 1 as described above and multiple pattern controls are performed using push-on and push-off switches, the data common to multiple types of pattern control is There has been a problem in that when there are loads that are common, erroneous control may be performed in which the common loads are not turned on.
For example, as shown in Figure 33, the lighting in a gymnasium
In the case where L ₁₁ to _{L 35} are pattern-controlled by two types of illumination patterns P ₁ and P ₂ , the illumination patterns P ₁ ,
The lights L ₁₃ , L ₂₃ , and L ₃₃ in the parts common to P ₂ need to be lit together when controlled by both lighting patterns, but from the entire lighting state where lighting is performed using both lighting patterns P ₁ and P ₂ . , when transitioning to partial illumination using one illumination pattern P ₁ (or P ₂ ),
There is a problem that lights in common areas are turned off. That is, when the pattern control switch of the other illumination pattern P ₂ (or P ₁ ) is turned off, one illumination pattern P ₂ (or
Illumination L ₁₃ of the common part to be lit in P ₁ ),
There is a problem in that L ₂₃ and L ₃₃ are turned off and desired partial illumination is not performed. In the embodiment, in order to solve this inconvenience, when one of the illumination patterns P ₁ and P ₂ is turned off, it is determined whether or not the other illumination pattern P ₂ and P ₁ is being illuminated. The central control unit 1 is provided with an erroneous control prevention means that checks the lighting conditions and prevents the lights L ₁₃ , L ₂₃ , and L ₃₃ in the common parts from turning off if the lights are on.

FIG. 34 is a flowchart showing the above-mentioned erroneous control prevention operation. When an operation of the pattern control switch is detected, it is determined whether the operation is an on operation or an off operation, and if it is an on operation, it is determined whether the operation is an on operation or an off operation. In the case of an off operation, a normal on operation routine is entered, and an off operation routine is entered to prevent the following malfunctions and turn off the illumination. That is, in the off operation routine, first, the address of the pattern control switch that has been turned off (the address of the monitoring terminal 2) is determined, and based on the address, predetermined data is read from the memory in which the pattern control data is stored. . Next, in order to normally control the lights L ₁₃ , L ₂₃ , and L ₃₃ in the common area, it is determined whether other pattern control switches are turned on, and whether or not the lighting is performed using other lighting patterns. If not, the illumination is controlled to be turned off all at once using the pattern control data read out from the memory. On the other hand, if control is being performed using another lighting pattern, the lighting of the common area obtained by ANDing the pattern control data of both lighting patterns.
Perform operations so that L ₁₃ , L ₂₃ , and L ₃₃ do not turn off.
Therefore, when one lighting pattern is turned off, it is possible to prevent an erroneous operation in which the lights L ₁₃ , L ₂₃ , and L ₃₃ in the common area that are turned on by other lighting patterns are turned off. will be done.

35 to 36 show other data setting means, in which individual control switches S ₁ to _{S 4} monitored by the monitoring terminal 2 are centrally arranged (lighting control switches for each floor are arranged). ) A monitoring terminal 2' of a pattern control switch with a data setting function is arranged in parallel on the switch panel section provided with a pattern setting terminal 9'. , a normal/setting switch SW ₃₀ , and an initial/change switch SW ₃₁ .
In the illustrated example, each monitoring terminal 2' monitors three pattern control switches, but it is also possible to monitor the status of one or two pattern control switches. good.

Now, if you press the normal/setting switch SW ₃₀ to enter the setting mode, the individual control switches S ₁ to _{S 4}
It is now possible to set pattern control data using . When performing initial settings here, by switching the initial/change switch SW ₃₁ to the initial setting mode side, all pattern control data set in advance will be cleared.
Data entry for initial settings is now easy. In addition, when set to change mode, the preset pattern control data
Since the information is displayed on the operation display section of the monitoring terminal 2, the data can be easily changed. Therefore, it is now possible to easily initialize or change the pattern control data as the layout changes.

[Effects of the Invention] As described above, the present invention connects a central control unit and a large number of terminal devices having unique addresses through a pair of signal lines, and controls the address data and load accessed by each terminal device. The central control unit sends out a transmission signal that transmits a return standby signal that sets the return period for control data and monitoring data from the terminals, and the monitoring data and control data are time-shared between the central control unit and each terminal. In a remote monitoring and control system that performs multiplex transmission, by providing an external interface terminal that time-division multiplex transmits data between an external control device and a central control device via signal lines, it can be used as a host computer. Loads can be monitored from multiple locations by connecting any external control device, and since the circuit power for the external interface terminal is obtained from the signal line, there is no problem even if the external control device goes down. This has the effect that the entire remote monitoring and control system will not go down. In addition, data transmission between the external interface terminal and the central control device is performed using interrupt processing, which has the effect of shortening the response time when controlling the load from the external control device. .

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of an embodiment of the present invention, Fig. 2 is an explanatory diagram of the same operation, Figs. 3 and 4 are block circuit diagrams of the main parts of the same, and Fig. 5a is a front view of the main parts of the same. Figure 5b is a side view of the main parts of the same as above, Fig. 5c is a rear view of the main parts of the same as above, Figs. 6 to 9 are explanatory diagrams of the same as above, and Fig. 10 is a circuit diagram of the main parts of , 11th
The figure is a schematic configuration diagram of the main parts of the same as above, FIG. 12 is a block circuit diagram of the main parts of the same as above, FIGS. 13 and 14 are operation explanatory diagrams of the same as above, and FIGS. Figure 17 is a front view of the main parts of the same as above, Figure 18 is an exploded perspective view of the main parts of the same as above, and Fig. 19 is a front view of the main parts of the same as above.
The figure is a partially cutaway front view of the main part of the same as the above, Fig. 20 is an exploded perspective view of the main part of the same as the above, Fig. 21 is a partially cutaway side view of the same as the above, and Fig. 22 is an exploded perspective view of the main part of the same as the above. FIG. 23 is an exploded perspective view showing another embodiment of the same as above, FIG. 24 is a block circuit diagram of the main part of the same as above, and FIG.
5 is an explanatory view of the same operation as above, FIG. 26 is a perspective view of the main parts of the same, FIGS. 27 a, b, and c are top views, front views, and rear views of the main parts of the above, and FIGS. 30 is an operational explanatory diagram of the same as the above, FIG. 31 is a block circuit diagram of the main part of the same as the above, FIG. 32 is a front view of the main part of the same as the above, and FIGS. 33 and 3
4 is an explanatory diagram of the same operation as above, FIG. 35 is a schematic configuration diagram of main parts of another embodiment, FIG. 36a is a front view of main parts same as above, FIG. Diagram c
37 is a rear view of the main parts of the same as above, and FIG. 37 is a schematic configuration diagram of a conventional example. 1 is a central control unit, 2 and 3 are terminals, 4 is a signal line, 7 is a wireless relay terminal, and 8 is an external interface terminal.

Claims (1)

[Claims] 1 A central control unit and a large number of terminal devices having unique addresses are connected by a pair of signal lines, and the period for returning address data for accessing each terminal device, control data for controlling load, and monitoring data from the terminal devices A transmission signal is sent from the central control unit that transmits a return standby signal to set the terminal device, and also supplies circuit power to the terminal device, and time-division multiplex transmission of monitoring data and control data is performed between the central control device and each terminal device. In a remote monitoring and control system constructed as described above, an external interface terminal is provided for time-division multiplexing data transmission between an external control device such as a host computer and a central control device via a signal line, and A remote monitoring and control system characterized in that data transmission between an ACE terminal device and a central control device is performed by interrupt processing.