JPS6178244A - Remote supervisory controlling method - Google Patents

Abstract

PURPOSE:To attain quick transmission between a master station and a slave station by providing a buffer memory for plural control information to a reception circuit of a slave station and receiving the next control signal from a master station even during the control of a device. CONSTITUTION:A device selection signal from the master station is inputted to a transmission/reception circuit 6 of a slave station 3 via a signal transmitter 2. A program of a ROM memory 9 is started by a microprocessor 7 in the slave station 3, and after it is confirmed that no device under present control exists, a signal received via an external bus 11 is outputted to the corresponding control signal output circuit 5-i. A selection relay of the corresponding CE12 is turned on and a selection end signal is returned to a data transmission/ reception section 4 through an external bus 11. When the microprocessor 7 receives a selection end signal from the control signal output circuit, a selection response signal is transmitted to the master station via the signal transmitter 2 through the transmission/reception circuit 6.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a polling-based information transmission method, and in particular,
In a system where multiple selection and erroneous control are not allowed, remote information transmission equipment that requires quick control and quick data transmission with the master station when controlling equipment that requires continuous control. Related to supervisory control method.

[Background of the invention]

A system configuration diagram in which this device is used is shown in FIG. 6, and a transmission time chart and a control signal output time chart of this device are shown in FIG. 7. The master station 1 transmits a device selection signal to the slave station 3-n, and the slave station 3-n, which receives the device selection signal, turns on the device selection relay of the corresponding CE and sends a device selection response signal to the master station 1. return it. Upon receiving the device selection response signal from the slave station 3-n, the master station 1 confirms that the selected device is correct, and subsequently transmits a control signal to the slave station 3-n. When the slave station 3-n receives the control signal from the master station 1, it turns on the corresponding control relay and returns a control response signal to the master station 1. The master station 1 completes a series of operations by receiving the control response signal from the slave station 3-n, and moves on to the next operation.

After completing this operation, the master station 1 does not transfer transmission control to other slave stations, but if it performs continuous control (including collection of display signals), it will The slave station 3-n does not receive signals from the master station, and has the disadvantage that it takes a lot of time to control a large number of devices in succession, and other functions become paralyzed. .

In addition, related devices of this type include Japanese Patent Application Laid-Open No. 1986-
No. 211248 is mentioned.

[Purpose of the invention]

An object of the present invention is to provide information that improves the functionality of the entire system by performing quick control and significantly shortening the transmission time when continuous control is required in the same slave station in a polling type information transmission device. The purpose is to provide a transmission method.

[Summary of the invention]

The present invention is a polling type information transmission device in which the selection signal from the master station to the slave stations is transmitted independently, and the operating time of the control relay is approximately 1 second in a powerful device. Focusing on the long length, we installed a buffer memory for multiple pieces of control information in the receiving circuit of the slave station, and even when one device is being controlled, the next control signal from the master station is received and attached, thereby speeding up the communication between the master station and the slave station. The aim is to ensure efficient transmission.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7. FIG. 6 is a system configuration diagram, FIG. 5 is an apparatus configuration diagram, and FIG. 1 is a transmission time chart and a control output time chart of the present invention. In the figure, 1 is a master station as a central processing unit that manages transmission, and 2 is a signal transmission device that connects the master station and each slave station 3. Further, the slave station 3 includes a data transmitting/receiving section 4 connected to the signal transmission device 2, a plurality of data input/output sections 5, and a bus 11 connecting the transmitting/receiving circuit and the plurality of control output circuits.

The device selection signal from the master station 1 is sent via the signal transmission device 2.
The signal is input to the transmitting/receiving circuit 6 of the slave station 3. In the slave station 3, the program in the ROM memory 9 is started by the microprocessor 7, and after confirming that no device is currently being controlled, the received signal is sent to the corresponding control signal output circuit 5-i ( 1≦i≦n). The control signal output circuit 5-i turns on the selection relay of the corresponding CE12.
Then, a selection completion signal is returned to the data transmitting/receiving section 4 via the external bus 11. When the microprocessor 7 receives the selection completion signal from the control signal output circuit 5-i, it
, the selection response signal is sent to the master station 1 via the signal transmission device 2.
Send to. When the master station 1 receives the selection response signal from the slave station, it subsequently transmits a control signal to the slave station. Upon receiving the control signal from the master station 1, the slave station 3 outputs the control signal to the control output circuit 5-i selected by the microprocessor via the external bus, and at the same time outputs the control signal to the control output circuit 5-i selected by the microprocessor.
A series of transmission procedures is completed by transmitting a control response signal from the transmitting/receiving circuit 6 via the signal transmitting device 2.

Next, the master station 1 that received the control response signal from the slave station 3,
If there is another device to be controlled, then another device selection signal is sent to the slave station 3, and the slave station 3 inputs a new device selection signal to the transmitter/receiver circuit 6 via the signal transmission device 2. Ru. In the slave station 3, the microprocessor 7 transmits a selection response signal corresponding to the received device selection signal to the master station 1 via the transmitter/receiver circuit 6 and the signal transmission device 2, if the previous control signal is being executed. do. At master station 1, selection response signal S
Upon receiving R, it further transmits a control signal E to the slave station 3. When the slave station 3 receives the control signal E, it stores it in the control signal E buffer memory of the RAM memory 10 together with the device selection signal S, and at the same time sends the control response signal ER to the master station 1.
A reply is sent via the transmitter/receiver circuit 6 and the signal transmission device 2. When the master station 1 receives the control response signal ER from the slave station 3, it repeats the above procedure if there is another device to be controlled. On the other hand, in the control signal output circuit 5-i, the control output ends and the control Depending on the conditions under which the relay was turned OFF, the selected relay of the corresponding CE is turned OFF. Microprocessor 7 corresponds to G
After confirming that the E selection relay is OFF and all GE selection relays are OFF, the RAM memory 1
If control signal information remains in the control signal buffer located at 0, first, the device selection signal S is taken out from the control signal buffer, and the corresponding control signal output circuit 5-i (1≦i ≦n). In the control signal output circuit 5-i which receives the device selection signal, the corresponding relay of the CE is turned on and outputs a 1 selection completion signal to the processor 7 through the external bus 11.

Upon receiving the selection completion signal, the processor 7 immediately takes out the control signal from the control signal buffer and outputs the control signal to the corresponding control signal output circuit 5-i. The control output of the corresponding control signal output circuit 5-i ends and the control relay turns OFF.
The selection relay of the corresponding GE is returned to OFF depending on the condition. This series of operations is repeated until there is no more control signal information in the control signal buffer in the RAM memory 10.

Note that 8 in the figure is an internal bus.

〔Effect of the invention〕

According to the present invention, in a polling type information transmission device, when the same slave station performs continuous control, it is possible to perform quick transmission control with a significantly shorter transmission time than in a conventional information transmission device. Therefore, the functionality of the entire system is improved.

[Brief explanation of drawings]

Figure 1 is a transmission and control signal output time chart according to the present invention, Figure 2 is a control signal reception program diagram, Figure 3 is a control signal storage program diagram, Figure 4 is a control signal output program diagram, and Figure 5 is an information FIG. 6 is a system configuration diagram, and FIG. 7 is a conventional transmission and control signal output time chart. 1... Master station, 2... Signal transmission device, 3... Slave station,
4...Data transmission/reception section, 5...Data input/output section, 6
... Transmission/reception circuit, 7... Microprocessor, 8.
...Internal bus, 9...POM, 10...RAM, 1
1...External bus, 12, CE, 13...I/O circuit.

Claims (1)

[Claims] 1. A transmitting/receiving circuit that is connected to a master station by a polling method via a transmission line and transmits and receives data to and from a signal transmission device, a microprocessor that controls the transmitting/receiving circuit, and this microprocessor. In an information transmission device comprising a control output circuit comprising process output control electronics and a process input/output device connected by bus coupling, equipment selection for the control output circuit of the information transmission device transmitted from the master station is provided. A plurality of buffer memories for temporarily storing signals and control signals are provided, and if the control output circuit is in operation when receiving the device selection signal, the device selection response signal corresponding to the received device selection signal is transmitted to the device selection signal. When the control signal is received, it is stored in the buffer memory together with the device selection signal, and after storage, a control response signal is transmitted to the master station, and furthermore, the reception of the next device control signal is controlled by the above-mentioned method. If the device control signal is restarted according to the procedure and there is no device control signal from the master station, the device control signal stored in the buffer memory is sequentially retrieved from the buffer memory and output to the control output circuit. A remote monitoring and control method.