JPH04273738A - Supervisory and controlling equipment - Google Patents

Abstract

PURPOSE:To collect the supervisory information of a designated slave station continuously by reducing the number of supervisory lines between a master station and each slave station as far as possible and without executing a polling procedure at every time in supervisory and controlling equipment of 1:N constitution. CONSTITUTION:In the supervisory and controlling equipment of 1:N constitution, a common pair of supervisory lines 20 separately from a common pair of control lines 10 are connected between the master station A and each slave station B via the line connection part 5 of each slave station B. The master station is provided with a function to control connection to the supervisory line of the line connection part 5 of each designated slave station B, and a function to receive the supervisory information of the designated slave station. The slave station B is provided with a function to receive control information from the master station A and to connect the supervisory information transmission part 4 of its own station to the supervisory line 20 based on the control information, and a function to transmit the supervisory information of its own station to the master station A.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention provides a system in which a master station and a slave station are connected in a ratio of 1:N.
The present invention relates to a monitoring/control device comprising a parent station and a pair of common control lines between a parent station and each slave station.

0002

2. Description of the Related Art The configuration of a conventional monitoring and control device of this type is shown in FIG. In the figure, control items of a master station A are transmitted from a control information transmitter 1 to a corresponding slave station via a pair of control lines 10. In the corresponding slave station, the control information receiving unit 3
Information indicating control items is received and output as control information to the outside.

[0003] Also, the monitoring information of each slave station is transmitted from the monitoring information transmitting section 4 of each slave station B to individual monitoring lines 20-1, 20-2, --- 20-N provided corresponding to each slave station. is transmitted to master station A via. In the master station A, the monitoring information of each slave station is received by the individual monitoring information receiving unit 2 provided corresponding to each slave station, and stored in the monitoring information receiving unit 2 corresponding to each slave station, and the monitoring information is stored in the monitoring information receiving unit 2 corresponding to each slave station. is output to the outside as information indicating.

0004

[Problems to be Solved by the Invention] As mentioned above, in the conventional monitoring/control device, a pair of independent monitoring lines must be provided between each slave station, in addition to a common pair of control lines. There was a problem. In addition, polling-based monitoring and control devices have the problem that even if monitoring information of a specified slave station is to be continuously collected, the master station must perform a polling procedure on the slave stations each time monitoring information is collected. there were.

The present invention has been made in view of the above circumstances, and it is possible to reduce the number of monitoring lines provided between a master station and a slave station, and to transmit monitoring information of a designated slave station every time.
A monitoring system configured with a 1:N ratio of a master station and a slave station that can continuously collect data without performing a polling procedure.
The purpose is to provide a control device.

[0006]

[Means for Solving the Problems] The monitoring and control device of the present invention is configured with a master station and slave stations in a ratio of 1:N, and a common pair of control lines is provided between the master station and each slave station. In a monitoring and control device consisting of It has a control means that outputs control information for switching and controlling the line connection means to the control line, and a receiving means that receives monitoring information from each designated slave station. monitoring information transmitting means for transmitting to the station; line connecting means for switching the connection between the monitoring information transmitting means and the monitoring line; The present invention is characterized by comprising a control means for controlling the line connecting means of the own station so as to connect the monitoring information transmitting means of the own station to the monitoring line side when the station corresponds to a designated slave station.

[0007]

[Operation] In the monitoring and control device configured as described above, the master station and each slave station are connected to a common pair of monitoring lines via the line connection means provided in each slave station, and the master station has a control means. Control information for switching and controlling the line connection means of each slave station designated by is output to the control line.

On the other hand, in the slave station, if the slave station corresponds to the designated slave station based on the control information sent from the master station via the pair of control lines, the control means controls the line connection of the slave station. Switching control is performed so that the means connects the monitoring information transmitting means of its own station to the monitoring line side. Further, the monitoring information transmitting means transmits the monitoring information of the own station to the master station.

[0009] In the master station, monitoring information from each designated slave station is received by the receiving means. Therefore, the number of monitoring lines provided between the master station and the slave stations can be reduced, and monitoring information of the designated slave stations can be continuously collected without performing a polling procedure every time.

0010

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows the configuration of an embodiment of a monitoring/control device according to the present invention. In the figure, the monitoring and control device according to the embodiment of the present invention includes a master station A and each of N slave stations B (
The slave stations numbered 1 to N) are connected via a pair of control lines 10.

The master station A has a control information transmitting section 1 and a monitoring information receiving section 2. The control information transmitting unit 1 transmits control information (control items) for switching and controlling the line connection unit 5 of each slave station in order to collect monitoring information from a designated slave station.
It has a function of outputting the information to the control information receiving section 3 of each slave station. The monitoring information receiving unit 2 also receives monitoring information from a designated slave station via a pair of monitoring lines 20.

On the other hand, each slave station B includes a control information receiving section 3, a monitoring information transmitting section 4, a line connecting section 5, and a slave station number setting section 6.
and a coincidence detection section 7. The control information receiving unit 3 receives control items (
normal control information is output from each slave station B to the outside, and if the input control item is for switching control of the line connection section 5, the control item is matched. output to section 7. The monitoring information transmitting section 4 transmits the monitoring information of its own station to the master station A via the line connection section 5. The line connecting unit 5 connects the monitoring line 20 to the monitoring information transmitting unit 4 based on the output signal of the coincidence detecting unit 7, or connects the monitoring line 20 and the line connecting unit 5 so as to bypass the monitoring information transmitting unit 4. Switch connections between. The slave station number assigned to the own station is set in the slave station number setting section 6. The coincidence detection unit 7 detects the slave station number data of the slave station B from which monitoring information included in the control information outputted from the control information receiving unit 3 is to be collected and the slave station number data set in the slave station number setting unit 6. If they match, the monitoring information transmitting section 4 is activated and the line connecting section 5 is switched to the monitoring information transmitting section 4 side.

In the above configuration, the master station A switches the line connection unit 5 of each slave station B in order to collect monitoring information from the designated slave station B from the control information transmitting unit 1 via the pair of control lines 10. Control information (control items) for control is output to the control information receiving section 3 of each slave station.

On the other hand, in each slave station B, the pair of control lines 1
The control information is received by the control information receiving unit 3 via 0, and the normal control information is output to the outside, and the information regarding the switching control of the line connection unit 5 is output to the coincidence detection unit 7. The coincidence detection unit 7 receives the control information from the control information receiving unit 3 and collects the slave station number data of the slave station B whose monitoring information contained in this information is to be collected and the slave station number set in the slave station number setting unit 6. data, and if they match, that is, if the own station is the applicable slave station, the monitoring information transmitting unit 4 is activated and the line connection unit 5 is controlled to be switched to the monitoring information transmitting unit 4 side. do. As a result, the line connection section 5 of the corresponding slave station is switched to the monitoring information transmitting section 4 side, and the monitoring information is sent from the monitoring information transmitting section 4 to the monitoring information receiving section 2 of the master station A via the pair of monitoring lines 20. Sent out.

The master station A stores the above-mentioned monitoring information in a storage area provided in the monitoring information receiving section 2 corresponding to the corresponding slave station, and outputs it to the outside as a monitoring item.

[0017]

As explained above, according to the monitoring and control device of the present invention, a pair of common monitoring lines are provided separately from a pair of control lines commonly provided between the master station and each slave station. In each slave station, a pair of monitoring lines and a monitoring information transmitting means for transmitting the monitoring information of the own station are configured to be connectable via the line connection means based on the control information output from the master station, so that the line used can be It is possible to easily construct a 1:N monitoring/control device even under conditions where the number of stations is limited, and unlike polling-based monitoring/control devices, it continuously collects monitoring information for specified slave stations. becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of a monitoring/control device according to the present invention.

FIG. 2 is a block diagram showing the configuration of a conventional monitoring/control device.

[Explanation of symbols]

A Master station B.Slave station 1 Control information transmitter 2 Monitoring information receiving section 3 Control information receiving section 4 Monitoring information transmission section 5　Line connection part 6 Slave station number setting section 7 Match detection section

Claims (1)

[Claims] Claim 1: A monitoring and control device configured with a 1:N ratio of a master station and slave stations, and a common pair of control lines provided between the master station and each slave station. The stations are connected to a common pair of monitoring lines through line connection means provided in each slave station, and the master station transmits control information to the control line to switch and control the line connection means of each designated slave station. The slave station has a control means for outputting, and a receiving means for receiving monitoring information from each designated slave station, and the slave station has a monitoring information transmitting means for transmitting its own monitoring information to the master station, and A line connecting means for switching the connection between the transmitting means and the monitoring line, and the own station corresponding to a slave station designated based on the control information sent from the master station via the pair of control lines. 1. A monitoring/control device comprising: control means for controlling a line connecting means of the own station so as to connect the monitoring information transmitting means of the own station to the monitoring line side when the monitoring information transmitting means of the own station is connected.