JPH06176285A - Monitoring system - Google Patents

Abstract

PURPOSE:To eliminate an oversight of an important alarm, to quickly and easily confirm the cause of abnormality thereby, and to reset a state of a plant to a normal state in an early stage by setting advance the kind of an alarm which becomes unnecessary due to the kind of abnormality, so that the unnecessary alarm is not generated frequency at the time of emergency. CONSTITUTION:By each controller 1, external apparatuses such as a pump 4, a valve 5, etc., provide in each part of a plant are controlled, and also, detecting signals outputted from external apparatuses such as various sensors 6, etc., provided in each part of the plant are fetched and they are transmitted to each monitor 3 through a transmission line 2, and when abnormality is generated in the plant, an alarm filtering processing (filtering task) is executed by each monitor thereof 3 and the contents of each abnormality are decided, important abnormality is extracted and it is outputted preferentially.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring system for monitoring various plant facilities and public facilities, and more particularly to a monitoring system for filtering alarm signals to give priority to alarm signals of high importance.

[0002]

2. Description of the Related Art Conventionally, in a system for monitoring various plant facilities in a factory or a system for monitoring public facilities such as a crime prevention network of buildings, water facilities, tunnel facilities, etc., the detection of each sensor provided in each monitored portion is detected. When an abnormality is detected by the operation, an alarm signal is output from each of these sensors, the monitoring device captures the alarm signal, and notifies the operator that the abnormality has occurred by a buzzer alert, CRT display, printer printing, etc. .

In this case, the alarms are roughly classified into two types, that is, a device abnormality alarm indicating an abnormality of the device and a control data abnormality alarm indicating an abnormality of the control data. If the device abnormality alarm is further subdivided, a serious failure occurs. The alarm is divided into an alarm and a light failure alarm, and the control data abnormality alarm is subdivided into a heavy alarm, a middle alarm and a light alarm.

When a buzzer is issued, these are issued in such a manner that a heavy alarm is high, a medium alarm is moderate, and a light alarm is low as a priority when the alarm is issued.

Further, when the CRT display is performed, a heavy alarm is preferentially displayed as a priority at the time of alerting, and the display colors thereof are also divided into red, purple, yellow, and the like.

Further, in such a monitoring device, related parameters such as the current value, the set value, and the upper and lower limit values are collectively referred to as a tag, and in the tag, an upper and upper limit value abnormality, The alarm priority is set by dividing it into upper limit abnormality, lower limit abnormality and lower and lower limit abnormality.Also, regarding the manipulated variable, the alarm priority is divided into the manipulated variable upper limit abnormality and the manipulated variable lower limit abnormality. Is set.

As described above, in such a monitoring device, a high priority is set for an important alarm among the alarms of the equipment to be monitored and the alarms of the control data, and an alarm that is not so important is set. By setting the middle alarm and light alarm according to the situation, the type of buzzer, volume, and CR
The type of alarm can be discriminated by changing the display color of T, etc., so that the operator can respond quickly.

[0008]

However, in the above-mentioned conventional monitoring device, the alarm can be divided according to the type of the abnormality, and the content of the abnormality can be easily confirmed, which causes the abnormality. When the amount of abnormality is small, it is possible to handle abnormalities in monitored devices and abnormalities in control data without problems, but in an emergency such as an emergency stop of a plant, a large amount of related abnormalities occur, so In some cases, information about anomalies that should be originally monitored was buried in the alarm for anomalies that were not related, and the occurrence of important anomalies was sometimes overlooked.

In view of the above circumstances, the present invention sets unnecessary alarm types in advance according to the type of abnormality so that unnecessary alarms do not occur frequently in an emergency.
It is an object of the present invention to provide a monitoring system capable of eliminating the oversight of important alarms, thereby quickly and easily confirming the cause of an abnormality and returning the plant state to a normal state at an early stage. .

[0010]

In order to achieve the above object, a monitoring system according to the present invention is a monitoring system for processing various signals output from a controlled device to generate an alarm. An alarm processing unit that takes in the detection signal output from the device and performs a preset process to determine whether there is an abnormality, and an alarm signal that is obtained when the alarm processing unit determines that there is an abnormality. And a filtering unit for filtering the alarm signal based on the priority set for each type of alarm signal to extract an alarm signal having a high priority.

[0011]

In the above structure, the detection signal output from the control target device is taken in by the alarm process, and a preset process is performed on the detection signal to determine whether or not there is an abnormality. For the alarm signal obtained when the filtering unit determines that there is an abnormality in the alarm process, the filtering process is performed based on the priority set for each type of alarm signal, and an alarm signal with a high priority is generated. It is extracted and displayed on the screen, or a buzzer sounds.

[0012]

1 is a block diagram showing an embodiment of a monitoring system according to the present invention.

The monitoring system shown in this figure comprises a plurality of control devices 1, a transmission line 2, and a plurality of monitoring devices 3, and pumps 4 and valves 5 and the like provided in each part of the plant by each control device 1. Control the external devices of the plant, capture detection signals output from external devices such as various sensors 6 provided in each part of the plant, and transmit the detection signals to each monitoring device 3 via the transmission path 2 to the plant. When an abnormality occurs, the contents of each abnormality are judged by each of these monitoring devices 3, the important abnormality is extracted, and this is output preferentially.

Each control device 1 is arranged in each part of the plant, and when control data is output from the monitoring device 3 or the like, the control device 1 fetches the control data via the transmission line 2 to control the pump 4 or valve. 5 and other external devices, and captures detection signals output from various external devices such as various sensors 6 provided in various parts of the plant and transmits them to the transmission line 2
It is also transmitted to each monitoring device 3 via.

The transmission line 2 is laid so as to cover each part of the plant, and when control data is output from each monitoring device 3 or the like, it is taken in and supplied to the designated control device 1, and these are also supplied. When a detection signal is output from each control device 1, this is taken in and supplied to the designated monitoring device 3.

As shown in FIG. 2, each of the monitoring devices 3 is provided with a plurality of consoles 10, a data processing unit 11, and a speaker 12, and various commands and various data input from each console 10 are stored. It is processed by the data processing unit 11 to generate control data, which is sent to the transmission path 2 and supplied to the control device 1 that is the monitoring target, or becomes the monitoring target via the transmission path 2. The detection signal from each control device 1 is taken and processed, and when an abnormality occurs in the control data or each part of the plant based on the processing result, the content of the abnormality is judged and the important abnormality is extracted. , This is preferentially displayed on each console 10, and the alarm is preferentially issued from the speaker 12.

Each operation console 10 takes in an operator's keyboard 15 having a plurality of keys and display data output from the data processing section 11 and displays it on the screen C
The RT16 and the CRT16 provided in front of the C
When the screen of the RT 16 is touched, it is detected to generate touch position data, and the touch position data is generated by the data processing unit 11.
When the operator's keyboard 15 is operated, various commands and various data corresponding to the operation contents are generated and supplied to the data processing unit 11, and the screen of the CRT 16 is also provided. When is touched, it is detected by the touch panel 17 to generate touch position data, and the touch position data is generated.
Supply to 1. Further, when the display data is output from the data processing unit 11, this is taken in and displayed on the screen of the CRT 16.

Further, the data processing unit 11 is a CP composed of a microprocessor for performing various data processing.
A U20, a hard disk device 21 used as a large-capacity storage area of the CPU 20, and a RAM 22 used as a temporary storage area of the CPU 20 are provided.

On the transmission line 2, control data generation processing for processing various commands and various data output from each operation console 10 to generate control data and control data obtained by this control data generation processing are transmitted on the transmission line 2. Control data transmission process for transmitting to each of the alarms, a priority order determination process for determining the priority order of each alarm, and a reception process for receiving a detection signal output from each control device 1 via the transmission path 2 as shown in FIG. (Reception task) 25, an alarm signal generation process (alarm task) 26 that generates an alarm signal by detecting an abnormality of each device or an abnormality of control data based on the detection signal obtained by this reception processing 25, the priority determination An alarm filtering process for filtering the alarm signal obtained by the alarm signal generation process based on the priority obtained by the process ( Filtering task 27, an alarm display process (display task) 28 for generating alarm display data based on the alarm signal filtered by the alarm filtering process 27, and an alarm buzzer based on the alarm signal filtered by the alarm filtering process 27. A signal is generated to produce the speaker 12
Processing such as an alarm sound processing (buzzer task) 29 to be output from is performed.

In this case, in the alarm filtering process 27, as shown in FIG. 4, the operation time is set in a matrix corresponding to the type of each tag and each layer divided into 5 stages, and the operation time is set in a matrix. As shown in FIG. 5, the filter is divided into five stages and the time after the activation signal is generated by the calculation in the control device 1, the type of the tag added to the alarm signal, and each of these The alarm signal is filtered based on the alarm type to be cut by the tag (for example, upper limit abnormality), unnecessary alarm signals are cut, and only important alarm signals are extracted. It is passed to the alarm sound processing 29.

Next, the alarm filtering processing operation of this embodiment will be described in detail with reference to the flow chart shown in FIG.

First, when the power of the monitoring device 3 is turned on and rises, the alarm filtering process 27 is activated to initialize the filter (step ST1) and check whether the activation signal has changed. (Step ST2).

If a start signal is included in the detection signals output from the control device 1 to be monitored (step ST
2) The counting of the elapsed time is started (step ST3), the filter operation time set for each tag is read (step ST4), and it is checked whether it is the execution time for the first layer. (Step ST
5) If it is the execution time, the alarm type for this tag is checked, and if it is an alarm other than this alarm type, the alarm of this tag is cut in this layer.

Accordingly, for example, an upper limit value abnormality is set as an alarm type corresponding to the tag type and the hierarchy, and when the actual alarm for the tag is the lower limit value abnormality, it is not cut. , (Step ST6).

If the execution time is not reached in the hierarchical structure, this cut processing is skipped.

Thereafter, this process is repeated for each filter layer to check whether or not it is the execution time for each layer, and if it is the execution time, the alarm of the corresponding tag is cut for each layer (steps ST2 to ST6). ).

When this processing is completed, another start signal is detected, and when this is detected, the above-mentioned filtering processing is executed (steps ST2-ST).
6).

Further, in the above-mentioned activation signal detection processing, if no activation signal is detected, it is checked whether or not an alarm to be filtered remains (step ST7). Similar to the processing, filtering processing for this alarm is executed (steps ST2 to ST6).

Each time an alarm passes through this filtering process, this alarm is preferentially displayed on each console 10 and a buzzer sound is output from the speaker 12.

As described above, in this embodiment, the control device 1 controls the external equipment such as the pump 4 and the valve 5 provided in each part of the plant, and the external equipment such as the various sensors 6 provided in each part of the plant. When the abnormality occurs in the plant, the detection signal output from the sensor is taken in and transmitted to each monitoring device 1 through the transmission line 2. The monitoring device 3 determines the content of each abnormality. Since important abnormalities are extracted and are output with priority, by setting the types of unnecessary alarms in advance according to the types of abnormalities, unnecessary alarms will not occur frequently in an emergency, By overlooking important alarms, it is possible to quickly and easily confirm the cause of abnormalities and restore the plant status to normal at an early stage. It can be.

[0031]

As described above, according to the present invention, unnecessary alarms are prevented from occurring frequently in an emergency by setting unnecessary alarm types in advance according to the type of abnormality, so that important alarms can be prevented. Oversight can be eliminated, whereby the cause of the abnormality can be confirmed quickly and easily, and the state of the plant can be returned to the normal state at an early stage.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a monitoring system according to the present invention.

FIG. 2 is a block diagram showing a detailed circuit configuration example of the monitoring device shown in FIG.

FIG. 3 is a schematic diagram showing a part of the processing functions of the monitoring device shown in FIG.

4 is a table showing an example of the relationship between each tag used in the filtering process shown in FIG. 3 and each layer.

5 is a schematic diagram showing a configuration example of a filter used in the filtering process shown in FIG.

FIG. 6 is a flowchart showing an operation example of the filtering process shown in FIG.

[Explanation of symbols]

 1 Control Device 2 Transmission Line 3 Monitoring Device 10 Operation Console 11 Data Processing Unit 12 Speaker 15 Operator's Keyboard 16 CRT 17 Touch Panel 20 CPU 21 Hard Disk Device 22 RAM 25 Receive Task 26 Alarm Task (Alarm Processing Unit) 27 Filtering Task (Filtering Unit) 28 Display task 29 Buzzer task

Claims (1)

[Claims] 1. A monitoring system for processing various signals output from a controlled device to generate an alarm, in which a detection signal output from the controlled device is fetched and a preset process is performed. And an alarm processing unit that determines whether or not there is an abnormality, and an alarm signal obtained by determining that there is an abnormality by the alarm processing unit is used to display the alarm signal based on the priority set for each type of alarm signal. A monitoring system comprising: a filtering unit for filtering and extracting a high-priority alarm signal.