JPS638680B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a supervisory control method for monitoring and controlling a large number of loads using a time division multiplex transmission method, in which each load is connected to a plurality of terminal devices having the same address, and each terminal device is It is connected to the central supervisory control unit, has several bits of control data in one address, and uses a load number selection switch provided in the terminal to determine which control bit is used to control the load, and transmits data from the central supervisory control unit. A mode signal is provided for the signal, and when the mode is control, when the address signals match, the control signal is received and the load is controlled by the corresponding control bit, and when the mode is split reply, the address signal and load number selection switch input are processed as addresses. The present invention relates to a supervisory control system characterized in that when the load conditions match, the load status is sent to a central supervisory control unit.

The purpose of the present invention is to enable a terminal device to be built into a control load, to improve the control speed by connecting a large number of loads to one address, and to increase the load control speed by providing a terminal device for each output unit. Furthermore, when monitoring the status of each terminal device, each load selection switch data is treated as an address, and monitoring data can be collected for each load unit, increasing the control speed and also making status monitoring possible.

Generally, when monitoring and controlling a large number of loads using a time division multiplex transmission method, a start signal, an address signal, and a control signal are sent out cyclically from a central monitoring and control unit, which are received by a terminal device and transmitted to the terminal device. When the set address matches the address signal, the load is controlled by the control signal, and at the same time a supervisory signal is sent to the central supervisory control unit. Generally, the start signal and address signal occupy a large proportion, so
By providing a control signal of several bits for one address and accessing one address, several loads can be opened and closed simultaneously with the control signal of several bits, thereby increasing the transmission speed. However, it is impossible to collect monitoring signals from multiple terminals with the same address, and when one terminal is installed, each output is connected to the load, which requires wiring high-power load wires. However, it was impossible to incorporate the equipment.

The present invention has been made in view of this point, and will be explained in detail below with reference to Examples.

In FIG. 1, reference numeral 1 denotes a central monitoring and control unit in which a plurality of terminals 2a have the same address i, and terminals 2a
b has address i+1, and each terminal 2a, 2b
Loads 3a, 3b, . . . , 3n are each independently connected to the terminals. From the central monitoring and control unit 1, the terminal device 2a or 2
At the same time, a control signal is transmitted to and controlled by.b. Next, when monitoring each load 3a, 3b...3n, the mode is set such that the address and load number are sent from the central monitoring control unit 1 as addresses without being controlled, and addresses i _a to i _o are sequentially accessed. to obtain the status signal. Each terminal device 2a, 2b has a load 3a, 3b...3n
However, if it is better to store it in a control panel or the like and connect it with electric wires from there, it may be controlled and monitored in the batch control and monitoring mode.

Figure 2 is a block diagram of the terminals 2a and 2b.
5 is a control logic, and 5 is an address setting switch. 6 is a load number selection switch for selecting a load number. Reference numeral 7 denotes a changeover switch for switching between batch control and divided control. The signal transmitted from the central supervisory control unit 1 is a conventional transmission signal with a mode signal added, as shown in Fig. 3.
When the mode signal is 0, it becomes the control mode, the control/load number signal becomes the control number, when the mode signal is 1, it becomes the split reply mode, and the control/load number signal becomes the load number signal, and the address signal and load number The terminal devices 2a and 2b specified by the signal send the load status as a reply signal to the central monitoring and control unit 1.

Now, when the transmission signal shown in FIG. 3 is input, when the mode signal is 0, the control mode is entered, and the control/load number signal becomes the control signal. At this time, when the changeover switch 7 is performing division control, no reply signal is sent out, and the control bit signal selected by the load number selection switch 6 is output to Q ₁ , Q ₂ , ...Q _o ,
It is transmitted to the load relay to control the load. Next, when the changeover switch 7 performs collective control, the control signal is turned on or off via a relay or the like to each corresponding load 3a, 3b, . . . 3n. At the same time, the status of each load 3a, 3b, .

Next, when the mode signal is 1 and the changeover switch 7 is performing collective control, the terminals 2a and 2b do not accept the signal. When the changeover switch 7 is performing split control, the control/load number signal becomes the load number signal and is sent to the terminal devices 2a, 2 specified by the address signal and the load number signal.
The status of the loads 3a, 3b, .

Conventionally, when controlling and monitoring the status using a device built-in terminal, it was necessary to use one address per terminal, and if 200 devices were to be controlled,
It takes 2 to 3 seconds, but if you set up 4 terminals with the same address and control each by setting a load number, access to all terminals can be completed in 1/4 of the time.
Works in 0.5-0.8 seconds. Since it can be controlled at such high speed, it is possible to control many instruments without causing discomfort to the user, and it is also possible to use it in combination with batch control.

As described above, in the present invention, each load is connected to a plurality of terminals having the same address, and each terminal is connected to the central supervisory control unit. The terminal has several bits of control data, and a load number selection switch installed in the terminal device determines which control bit is used to control the load.A mode signal is provided in the transmission signal from the central supervisory control section, and the mode is controlled. Sometimes, when the address signals match, a control signal is received and the load is controlled by the corresponding control bit.
A large number of loads can be connected to one address, improving control speed, and by providing a terminal for each output unit, load control speed can be further improved.
When the mode is a split reply, the address signal and the load number selection switch input are processed as addresses, and if they match, the load status is sent to the central monitoring control unit. Therefore, each load selection switch data is also treated as an address, and each load number selection switch input is processed as an address. This has the advantage of being able to collect monitoring data and monitoring the load status.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram of an embodiment of the present invention.
FIG. 2 is a block diagram of the same terminal, and FIG. 3 is a diagram showing the structure of the transmission signal. 1...Central monitoring control unit, 2a, 2b...Terminal device, 3
a, 3b...3n...Load, 6...Load number selection switch.

Claims (1)

[Claims] 1. In a supervisory control method that monitors and controls a large number of loads using a time division multiplex transmission method, each load is connected to a plurality of terminals having the same address, and each terminal is connected to a central supervisory control unit.
The address has several bits of control data, and a load number selection switch installed in the terminal device determines which control bits are used to control the load.A mode signal is provided in the transmission signal from the central supervisory control section, and the mode is set. During control, if the address signals match, the control signal is received and the load is controlled using the corresponding control bit, and when the mode is split reply, the address signal and load number selection switch input are processed as addresses, and if they match, the load status is centrally monitored and controlled. A supervisory control method characterized in that the system transmits data to the department.