JPH01265697A - Remote supervisory and control system - Google Patents

Abstract

PURPOSE:To simplify address setting by using a high-order bit of a specific address as a terminal kind setting bit and using remaining bits as user setting bits. CONSTITUTION:In the setting of a fixed address by an address setting section 5 of a printed circuit board for monitor and control terminal equipments 2, 3, a dip switch 7 is used to set the low-order 6-bit of the 8-bit address data. The high-order 2-bit of the terminal kind setting (monitor or control) is selected fixedly by jumper line 6 and the setting bit number is decreased and the address is set simply. In the case of setting user setting bits, the low-order 6-bit of the specific address of the terminal equipments 2, 3 is set to the same value by using the switch 7 to cope both terminal equipments easily with each other and the load L connected to the terminal equipment 3 is controlled based on the monitor data of the switch S returned from the terminal equipment 2 whose address is set identically by the switch 7. Thus, the address is more simply set.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a remote monitoring and control system for remotely controlling a load.

[Prior art 1] Conventionally, this type of remote monitoring and control system connects a central control unit and a plurality of monitoring N1JL terminals and control terminals, each of which has a unique address, through a pair of signal lines. ! ! accesses each terminal from the terminal, causes the monitoring terminal to return monitoring data indicating the state of the operation switch, and accesses the control terminal to transmit control data for controlling the load based on the monitoring data. The address setting section for setting the unique address of each terminal device was formed using the same number of dip switches as the number of bits of the unique address.

[Problem to be Solved by the Invention J] However, in the conventional example described above, all bits of the unique address are set by the user, so while the unique address can be set freely and is versatile, the address setting The problem was that it became complicated and difficult to do.

The present invention has been made in view of the above-mentioned 7α, and its purpose is to provide a remote monitoring and control system in which unique addresses of monitoring terminals and control terminals can be easily set. It's about doing.

[Means for Solving the Problems] The remote monitoring and control system of the present invention connects a central control device and a plurality of monitoring terminals and control terminals each having a unique address via a pair of signal lines. , the central control device accesses each terminal device, the monitoring terminal device returns monitoring data indicating the state of the operation switch, and the control terminal device accesses control data for controlling the load based on the monitoring data. In a remote monitoring and control system that transmits data using a remote control system, the upper appropriate bits of the unique addresses of the monitoring terminal and control terminal are used as terminal type setting bits, and the remaining bits are user setting bits that can be set by the user. The address setting section of each terminal is formed so that the terminal type setting bit is fixed by circuit wiring, and the user setting bit can be set freely by a dip switch.

[Function] The present invention is configured as described above, and the central control device accesses the monitoring terminal device and the control terminal device to which unique addresses are set, and transmits the monitoring data and control data by time division multiplexing. In such a remote monitoring and control system, the upper appropriate bits of the unique addresses of the monitoring terminal and control terminal are fixed in the circuit wiring as bits for setting the terminal type, and the remaining bits can be set by the user. Since the address setting part of each terminal is formed so that it can be set freely with a dip switch as a user setting bit, the number of setting bits of the unique address is reduced, making the setting work easier, and the monitoring Ni terminal By simply setting the user setting bits of the control terminal and the control terminal to the same value, both terminals can be made compatible, making address setting easier.

[Example J IjS1 shows the schematic configuration of an example of the present invention,
The central control wave ra1 is connected to a plurality of monitoring terminals 2 and control terminals 3 to which unique addresses are set by a pair of signal lines 4, and the central control wave r! As shown in FIG. 2(a), the transmission signal Vs sent from 11 to the signal line 4 includes a start pulse signal ST indicating the start of signal transmission, a mode data signal MD indicating the signal mode, and a terminal device 2, 3. Address data signal AD to call, control data signal CD to control the load, checksum data signal C8, and return standby signal W to set the return period from the terminal device 2.3.
It is a bipolar (±24V) time division multiplexed signal consisting of T,
Data is transmitted using pulse width modulation. When the address data of the transmission signal Vs received via signal #14 and its own unique address data match, each terminal device 2 and 3 takes in the control data of the transmission signal Vs, and returns the transmission signal Vs. Standby signal W
In synchronization with T, the monitoring data signal is converted into a current mode signal (signal A
14 via a suitable low impedance, and the signal is sent back as a reply signal VB.

Also, medium heat control device! ! 1 includes a mode data signal MD
a dummy signal transmitting means that always sends out a dummy transmission signal Vs in dummy mode, and an interrupt signal V (as shown in FIG. 2(b)) returned from one of the monitoring terminals B2.
Interrupt processing means is provided which detects the interrupt generating terminal device 2 when i is received, accesses the terminal device 2, and causes the monitored data to be sent back. On the other hand, the monitoring terminal 2
When there is a monitoring input due to the operation of the operation switch S, the interrupt signal Vi is returned as a reply signal vn in synchronization with the start pulse signal ST of the dummy transmission signal Vs, and the input signal from the central control device 1 is sent back. Interrupt generation means for returning own unique address data in synchronization with return standby signal WT of transmission signal Vs in address confirmation mode; and transmission signal VS in interrupt access mode in response to an interrupt from central #control device 1; Data return means is provided for returning monitoring data corresponding to the monitoring input as a reply signal VB when the monitoring input is transmitted. In addition, the central control device fil creates control data to be transmitted to the control terminal device 3 based on the monitoring data sent back from the monitoring terminal device 2 to the central control device 1, and also transmits it to the control terminal device 3. It is designed to control the load.

By the way, in the embodiment, the upper appropriate bits (for example, 2 bits) of the 8-bit unique address of the monitoring terminal device 2 and the control terminal device 3 are used as terminal type setting bits, and the remaining bits (for example, 6 bits) are used as terminal type setting bits. is a user setting bit that can be set by the user, and the address setting section 5 of each terminal device 2, 3 fixes the terminal type setting bit with circuit wiring such as a jumper M6, and the user setting bit is set by a dip switch 7. It is designed to be freely configurable. tJS3 Figure (a) is a front view of the monitoring terminal 2 with the front cover removed, with the wall switch SW inside.On the front of the terminal main body 20 there is a DIP switch for setting the unique 7-dre size user setting bits. 7 is exposed,
21 is signal #! It is a connection terminal. In addition, FIG. 3(b) shows a front view of the control terminal 3 with a built-in load control relay with the front cover removed, and the user setting bit of the unique address is set on the front of the terminal main body 30. The dip switch 7 is exposed, 31 is a signal line connection terminal, and 32 is a relay contact output terminal. Figure 4(a)(b)
) shows the printed circuit boards 22 and 33 on which the terminal circuits of the monitoring terminal 2 and the control terminal 3 are respectively mounted, and in the embodiment, the unique address of the monitoring terminal 2 is The terminal device type setting bit is set to “00”, and the terminal device type setting bit of the unique address of the control terminal device 3 is set to “10” by the jumper line 6.

The operation of the embodiment will be described below. Now, when setting the unique address of each terminal device 2 and 3 in the address setting section 5, the unique address setting by the dip switch 7 sets the lower 6 bits of the 8-bit address data excluding the upper 2 bits. The upper two bits for terminal type setting (monitoring or control) are fixed (rooJ or rl) by circuit wiring using jumper wire 6.
OJ), and the number of setting bits is reduced, making address setting easier.

In addition, when setting the user setting bits (lower 6 bits), simply setting the lower 6 bits of the unique addresses of the monitoring and control terminals 2 and 3 to the same value with the DIP switch 7 allows both terminals 2 and 3 to be set to the same value. 3 can be easily matched, and the load connected to the control terminal 3 can be easily adjusted based on the monitoring data of the switch S sent back from the monitoring terminal 2 with the same address setting by the dip switch 7. It can be controlled. In other words, the upper unique address (lower 6 bits) appears to be the same value as seen from the user side, but the actual unique address (8 bits) as seen from the central controller 1 is as shown in FIG. , different values (each other “1
28'' apart), and there is no problem when accessing the corresponding monitoring terminal 2 and control terminal 3 from the central control device 1.

[Effect of the Invention 1] The present invention is configured as described above, and allows time division multiplex transmission of monitoring data and control data by accessing the monitoring terminal device and the control terminal device to which unique addresses are set from the central control device. In a remote monitoring and control system, the upper appropriate bits of the unique addresses of the monitoring terminal and control terminal are fixed in circuit wiring as bits for setting the terminal type, and the remaining bits are set by the user. Since the address setting part of each terminal is formed so that it can be set freely with a DIP switch as a user setting bit, the number of bits to set the unique address is reduced, making the setting work easier, and making it easier for monitoring terminals. By simply setting the user setting bits of the control terminal and the control terminal to the same value, both terminals can be made to correspond, which has the effect of making address setting easier.

[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, and FIGS. 3 (a) and (b) are front views of the main parts of the same.
tJS4 Figures (a) and (b) are perspective views of essential parts of the same as above, and Figure 5 is an explanatory diagram of the same as above. . 1 is a central control unit, 2 is a monitoring terminal, 3 is a control terminal, 4 is a signal line, 5 is an address setting section, 6 is a jumper line, and 7 is a dip switch. Agent Patent Attorney Ishi 1) Ai Figure 7 Figure 3 (G) (b) Figure 4 (b) Figure 5

Claims (1)

[Claims] (1) Connect the central control unit and multiple monitoring terminals and control terminals for which unique addresses have been set, using a pair of signal lines, and access each terminal from the central control unit. In a remote monitoring and control system, the monitoring terminal returns monitoring data indicating the state of the operation switch, and accesses the control terminal to transmit control data for controlling the load based on the monitoring data. The upper appropriate bits of the unique address of the control terminal are set as terminal type setting bits, and the remaining bits are set as user setting bits that can be set by the user.The terminal type setting bits are fixed by circuit wiring, and the user A remote monitoring and control system characterized in that an address setting section of each terminal device is formed so that setting bits can be set freely with a dip switch.