JPS58181111A - Process monitoring method - Google Patents

Abstract

PURPOSE:To improve the monitoring efficiency, by outputting only a true fault factor in a computer centralized monitor system. CONSTITUTION:Information of a contact 2 and information 3 of a process quantity are read through an input device 4 from a monitor object plant 1, and faulty states generated in the plant at random are arranged in a factor analyzing device 13 on a basis of these process information; and if it is decided that alarm output is required, an alarm output processing device 15 is started, and the alarm output is displayed on a CRT device 19 and an announcement typewriter 18 to transmit proper information to the monitor.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a process monitoring method, and particularly to a process monitoring method suitable for use in a computer intensive monitoring system targeted for monitoring.

When monitoring water and sewage plants, buildings, etc., a computer intensive monitoring system is used to centrally monitor failure information of a large number of process equipment or to provide monitoring personnel with failure occurrence information in real time. Conventional computer-based process central monitoring equipment like this takes in information from the plant being side-viewed (failure detection contact information, etc.), and releases all information that has changed (fault contact information) individually into an announcement type system. A method of outputting to an output device such as a writer or CRT has been adopted. According to this method, the fault contact can operate over a wide range of situations, such as when the fault contact of a related auxiliary machine operates due to a fault in the main engine, or when the primary side trips due to an abnormality on the secondary side in the case of a fault in the power supply system. In addition, since it is necessary to output the operation of all faulty contacts, it is necessary for the operator to analyze the true cause of the failure, which not only significantly reduces monitoring performance but also increases the amount of operation of the output device. This has disadvantages such as shortening the life of the output device and increasing the amount of output paper used. In particular, with the introduction of computer systems, there is a tendency to require a reduction in the number of operators.
It is desired to reduce the intellectual labor required for the operator and to save printing paper for typewriters.

An object of the present invention is to provide a process monitoring method that improves monitoring performance by outputting only the true cause of failure.

The present invention is designed to output only the true cause of failure without outputting all individual failure causes. For example, in a computer-based centralized monitoring system for water and sewage plants, individual failure contacts of power receiving and distribution equipment or water treatment equipment are input into the computer system using digital input signals, and changes in the signal (1 → 0.0 → 1) When detecting the occurrence of a failure and announcing it to the output device, in the above-mentioned equipment, we focus on the fact that the cause of failure in one device becomes the cause of failure in other devices within a unit time, A fault status signal is input as a digital input signal from a computer system at regular intervals, and changes (0 → 1, or 1 → 0) at the input timing.
Among the signals that have been determined in advance to be the cause of a failure (a failure occurs due to a change in the The failure situation is investigated and only the true cause of the failure is announced.

FIG. 1 is an overall configuration diagram of a system to which the monitoring method of the present invention is applied. As shown in this figure, the monitoring method of the present invention reads information 3 sent from a monitored plant 1 as contact point information 2 and process quantities through an input device 4, and based on these process information, The purpose of this system is to sort out the failure states that occur randomly during the process, and to convey appropriate information to the monitoring personnel. 6 is the Δ that is periodically emitted by the clock device 7.
This is a cycle management device that integrates t clocks and activates the five information reading devices at a cycle that is N times Δt. Reference numeral 5 denotes an information reading device that reads plant information such as contact information 2 and process information 3 through the process input device 4 based on the cycle command from the cycle management device 6, and writes it into the process information register 8.

At the same time, the contents of the register 9 of the previous read information and the corresponding information of the process information register 8 are sequentially compared and when there is a change (
Change in digital information from 1 to 0.0 to 1) Judgment circuit (1)
It issues command information indicating a change to 10. The read information is transferred from the process information register 8 to the register 9 at the timing when the command is issued. The determination circuit 10 has completed reading,
This is a circuit that issues a start command to the factor extraction device 11 in response to a command indicating that there is a change. When the factor extraction device 11Vi is activated, it extracts the change factor from the register 9, extracts the level of the change factor from the A''5r5r key level management register 12↓ and the value of the analysis register, and instructs the factor analysis device 13. The factor level management register has one case for each failure factor manually input from the process, and the level of the factor (whether it is a factor that can be a starting point for failure analysis or not, level = 1). 13 is a register that stores the case information of the analysis register 14. 13 processes the contents of the case in the analysis register 14 based on the activation command and information received from the factor extraction device 11, and as a result reports 11. This is a factor analysis device that determines output specifications.The operation of the factor extraction device 13 will be specifically explained below.

FIG. 2 is an example showing the memory peaks and troughs of the register 9 at arbitrary timing, and Table 1 shows the analysis register 14.
This shows the contents of one arbitrary case.

The factor analysis device 13 operates based on the activation command given by the factor extraction device 11 and the analysis register 140 case &. First, the given analysis register 14
One target case is determined based on the case shop, and based on the contents of the case, the corresponding process information is indexed from the register 9 and an element specification in the analysis register 14 is created.

That is, all element specifications are in the O state in the initial state, and the factor analysis device 13 determines the corresponding process specifications in the case from the process information indexed from the register 9 in the information register relative shop and the information register point shop. Created. The process specification is information that indicates whether the information indexed from the register 9 is to be affirmed or denied, and is based on the process specification and the process information from the register 9.
The element specification in question will be entered as 1 or 0. If the logical product of element specifications 1 to 8 of the case in the analysis register 14 is 1, the device analysis device 1
3 extracts the alarm specification register in the analysis register 14, determines that it is output processing of the failure factor received from the cause extraction bag jtll, and instructs the alarm output processing device 15 to output an alarm. Further, when the logical product is O, the failure cause received from the cause extraction device 11 is considered invalid (a supplementary factor not worthy of output), and no command is issued to the alarm output processing device 15. (In this example, a case has been described in which the failure cause commanded by the factor extraction device 11 is related to eight pieces of process information, but the contents of one case in the analysis register 14 are 17 is a buffer register that temporarily stores the case information of the alarm specification register 16 as shown in Table 2 when the cause analyzer 13 determines that alarm output is necessary. The alarm output processing device 15 is the factor analysis device 1
3, the alarm specification register 160 case shop is indexed from the contents of the buffer register 17, and the output manufacturer of the alarm written in the case of the alarm specification register 16 is output, and the announcement typewriter 18 is designated according to the output specification. and C)' It is an alarm output processing device that outputs an alarm to the LT device 19.

According to the embodiment of the present invention, it is possible to provide guidance on only the more effective failure cause among the related causes without outputting all the causes of multiple failures and abnormalities that randomly occur in the process. It's effective.

(1) Monitoring performance is improved and the load on the monitoring staff can be reduced.

(2) The operating frequency of the output device can be reduced by approximately 50%, which has an effect on the life of the device.

(3) When outputting to a typewriter, etc., 1o) of output paper can be saved.

As is clear from the above, according to the present invention, monitoring performance can be improved by outputting only the true cause of failure.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a logic level diagram showing the contents of register 9 shown in FIG. 1...Plant to be monitored, 2...Contact information, 4...
・Process input device, 5... Information reading device, 6.
... Cycle management device, 7... Clock device, 8... Process information register, 9... Register, 10... Judgment circuit, 11... Factor extraction device, 12... Factor level management register , 13... Factor analysis device, 14... Analysis register, 15... Alarm output processing device, 16... Alarm specification register, 17... Buffer register, 18.
・Announcement Men (10)

Claims (1)

[Claims] 1. Centrally monitor failure information from a large number of process equipment,
In a process monitoring system that uses a computer to provide failure occurrence information, only direct causes are extracted from among multiple failure causes that occur randomly, and these individual factors are used as the starting point for failure analysis to calculate all causes. A process monitoring method characterized by investigating the failure occurrence status of related equipment and announcing only the true cause of failure occurrence.