JPH03188794A - Monitor controller and its monitor method - Google Patents

Abstract

PURPOSE:To attain fault alarm notice immediately when a fault takes place in a monitor input section by constituting a detection function test of the monitor input section so as to allow the monitor controller itself to apply self- diagnosis periodically and automatically. CONSTITUTION:A control signal is sent from a monitor information transmission processing section 8 to a relay 6 for a predetermined time, the relay 6 is activated, a contact 6-1 is closed, a current flows from a power supply OVF to a power supply -VF, photocouplers 2-1 to 2-n are conductive independently of operating state information from monitored equipments 15-1 to 15-n and logical L is outputted. The monitor information transmission processing section 8 receives the level to discriminate whether or not the photocouplers 2-1 to 2-n are conductive. Then a control signal is sent from the monitor information transmission processing section 8 to a relay 7, the relay 7 is activated to open a contact 7-1 and a current loop flowing from the power supply OVF to the power supply -VF is opened, the conduction of the photocouplers 2-1 to 2-n is interrupted and logical H is outputted. The output signal is used to discriminate whether or not the photocouplers 2-1 to 2-n are nonconductive.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to supervisory control in a remote monitoring system that transmits alarm information of monitored equipment and the on/off status of relay contacts, etc. indicating the operating status, to a remote monitoring center. The present invention relates to a device, and further relates to a detection circuit for a monitoring and visual input unit that detects alarm information and operating status information.

[Conventional technology]

Conventionally, this type of monitoring control device does not have a self-diagnosis function in the monitoring input section 1 that detects operating status information of the monitored equipment, as shown in FIG. As shown in FIG. 3, using the test switch 13 and the pseudo signal input device 14, the detection function of the monitoring input section can be diagnosed by returning the power supply OVF from the monitoring control device 10 and inputting a pseudo monitoring signal. I was going.

[Problem to be solved by the invention]

To diagnose the detection function of the monitoring input section of the conventional monitoring and control equipment mentioned above, it is necessary to go out of the way from the center to the monitoring and control equipment installed near the monitored equipment, manually connect a test circuit to the outside, and test the pseudo signal. was inputting. Therefore, the detection function diagnostic test takes a long time and requires supervision of the monitored equipment during that time.

Vision becomes impossible. Furthermore, since automatic diagnosis cannot be performed in a short period, there is a risk that failure detection in the monitoring input section will be delayed, which may impede remote monitoring of the monitored equipment.

SUMMARY OF THE INVENTION An object of the present invention is to provide a monitoring control device that can periodically and automatically self-diagnose a detection function test of a monitoring input section and report a failure alarm of the monitoring input section.

[Means to solve the problem]

The supervisory control device of the present invention includes 1. at least one operating state detection circuit that operates upon receiving monitoring information from the monitored equipment;
a forced drive circuit that forcibly operates the operating state detection circuit using control information different from the monitoring information; and an operation information that outputs control information at least according to a predetermined cycle, and that is output by the forced drive circuit and the operating state detection circuit. It is composed of a monitoring/information transmission processing circuit that generates, processes, and outputs the signal in a predetermined signal form.

2. A photocoupler is used in the operating state detection circuit of item 1 above, and the cathode of the photocoupler is connected to one end of the bias voltage through a first switch, and the anode is connected to the other end of the bias voltage through a second switch. The first and second switches are connected to each other, and the first and second switches are operated reciprocally under the control of the monitoring information transmission processing circuit, thereby forcibly driving the photocoupler.

3. The monitoring control device according to item 1 or 2 above is located near the monitored equipment, and transmits the operating state information of the monitored equipment generated by the monitoring information transmission processing circuit to the monitoring center via a transmission path. Features.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of a supervisory control device showing an embodiment of the present invention, and FIG. 2 is a block diagram of a supervisory control device shown in FIG. FIG. 2 is a block diagram of a remote monitoring and control system that transmits data to a device.

The monitoring control device 10 in FIG. 1 detects the operating state information received at the monitoring input terminals 11-1 to 11n, into which operating state information of monitored equipment is input, and the monitoring input terminals 11-1 to 11-n. Photocouplers 2-1 to 2-n and current limiting resistor 3
-1 to 3-n, pull-up resistors 4-1 to 4-n, photocoupler continuity testing diodes 5-1 to 5-n, photocoupler continuity testing relay 6, its contact 6-1, and photocoupler continuity testing. It is composed of a non-continuity test relay 7, its contact 7-1, a monitoring information transmission processing section 8, and a transmission line 12.

FIG. 2 shows a plurality of monitored facilities 15-1 to 15-n connected to the supervisory control device 10, a center device 16, and operating state information of each monitored facility 15-1 to 15-n to the center device. It is composed of a transmission line 12 for sending out data.

When normal operating state information from the monitored equipment 15-1 to 15-n, such as logic rl, J, is input via the monitoring input terminals 1-1 to 1-n, the photocouplers 2-1 to 2
-n is cut off and the logic rHJ is output to the monitoring information transmission processing section 8. The monitoring information transmission processing section 8 includes a photocoupler 2
A plurality of logical "H" signals outputted by -1 to 2-n are generated and multiplexed into a predetermined signal form, and sent to the center device 16 via the transmission line 12. If an abnormality occurs in the monitored equipment 15-1 to 15-n and the input signal of the monitoring input terminal 11-1 changes to logic r) (J), the diode of the photocoupler 2-1, the resistor 3-1, and the relay 7 Power supply -V through contact 7-1 of
Current flows through P, photocoupler 2-1 becomes conductive, and the logic becomes "L".
is output to the monitoring information transmission processing section 8. The monitoring information transmission processing section 8 generates a multiple signal in which only the signal from the photocoupler 2-1 is set to logic "L" and sends it to the center device 16 to notify abnormal operation of the monitored equipment 15-1.

Next, the self-diagnosis function operation of the monitoring input section 1 will be explained.

At a predetermined time, a control signal is sent from the monitoring information transmission processing unit 8 to the relay 6, which activates the relay 6 and closes the contact 6-1. When the contact 6-1 is closed, the power supply Ovp is connected to the contact 6-1. Current flows to the power supply -■ through the diodes 5-1 to 5-n, the photocouplers 2-1 to 2-n, the resistors 3-1 to 3-n, and the contact 7-1 of the relay 7, and the monitored equipment 1
Regardless of the operating state information from 5-1 to 15-n, photocouplers 2-1 to 2-n are rendered conductive and output a logic "L". The monitoring information transmission processing unit 8 receives logic "L" signals from the photocouplers 2-1 to 2-n, and transmits all the photocouplers 2-1 to 2-n.
-n is in a conductive state.

When the continuity test of the monitoring input section 1 is completed, a control signal is subsequently sent from the monitoring information transmission processing section 8 to the relay 7, and a non-continuity test of the photocouplers 2-1 to 2-n is performed. The relay 7 is actuated by the control signal output by the monitoring information transmission processing section 8 to open the contact 7-1, and the contact 6-1. Photocouplers 2-1 to 2-n, resistors 3-1 to 3-
○, the current loop flowing to the power supply -VP via the contact 7-1 is opened, the conduction of the photocouplers 2-1 to 2-n is cut off, and a logic "H" is output. This photocoupler 2-1~
Based on the output signal of 2-n, the monitoring information transmission processing unit 8 determines whether all photocouplers 2-1 to 2-n are in a non-conducting state.

When the non-continuity test of the monitoring input section 1 is completed, the control signal for the relay 6.7 is cut off from the monitoring information transmission processing section 8, the contact 6-1 of the relay 6 is opened, and the contact 7-1 of the relay 7 is closed. It is restored to the initial state and enters a state of monitoring the operation of the monitored equipment 15-1 to 15-n.

Note that this self-diagnosis of the monitoring input unit 1 is performed once every 10 seconds, for example.
The test results are sent to the center device 16 via the transmission line 12, and as soon as a fault is discovered in the monitoring input section 1, the relevant part is repaired.

〔Effect of the invention〕

As explained above, in the present invention, since the detection function test of the monitoring input section can be periodically and automatically self-diagnosed by the monitoring control device itself, it is possible to immediately report an abnormality alarm when an abnormality occurs in the monitoring input section. This has the effect of immediately detecting a state in which monitoring is impossible due to a failure in the monitoring input section.

Switching device for use, 14...Pseudo signal input device, 15-1 to 15
-n...Monitored equipment, 16...Center device.

Claims (1)

[Scope of Claims] 1. At least one operating state detection circuit that operates upon receiving monitoring information from monitored equipment; and a forced drive circuit that forcibly operates the operating state detection circuit using control information different from the monitoring information. , further comprising a monitoring information transmission processing circuit that outputs control information according to at least a predetermined cycle, and generates and processes the operation information output by the forced drive circuit and the operation state detection circuit into a predetermined signal form and outputs the same. Features of supervisory control equipment. 2. A photocoupler is used in the operating state detection circuit according to claim 1, and the cathode of the photocoupler is connected to one end of the bias voltage through a first switch, and the anode is connected to the other end of the bias voltage through a second switch. A monitoring and control device comprising: a forced driving circuit connected to the monitoring information transmission processing circuit to actuate the first and second switches reciprocally under the control of the monitoring information transmission processing circuit and forcibly drive the photocoupler. 3. The monitoring control device according to claim 1 or 2 is located near the monitored equipment, and is configured to send the operating state information of the monitored equipment generated by the monitoring information transmission processing circuit to a monitoring center via a transmission path. A monitoring method characterized by configuring.