JPS5945511A - Method for supervising plant status - Google Patents

Abstract

PURPOSE:To monitor easily a plant by executing data processing only when the status of a plant signal is changed. CONSTITUTION:Plural plant apparatus and detectors are divided into related two groups and respective signal lines are connected to a data way 8 through process I/O devices 41, 42 connected correspondingly to the groups. When detecting the change of a plant signal, a data processor 7 forms a flag. The variation of signal state is detected in an analog signal when the signal is transferred to a different level area and in a digital signal when the level is changed from ''H'' to ''L''. The data processor 7 checks the state of a group in which a flag is formed with a prescribed cycle in detail and displays the state. Since the processing is executed only when necessary, the data processor 7 is prevented from loads.

Description

[Detailed description of the invention] The present invention relates to a method for monitoring plant conditions.

When lightning occurs in a large-scale, complex plant, is it possible to quickly collect data and easily understand the plant status? It is desirable to be able to monitor the status by outputting f-reports.

Conventionally, in order to monitor plant conditions, the plant condition can be checked to be normal using either a ``Twiered Rosic device'' or a stored program data processing device.

All points are processed collectively without distinguishing between abnormalities, and in the case of large-scale, complex plants, it is possible to grasp the details of abnormality information6 due to constraints on the installation space of the display device. Regardless of the abnormality, it took a long time to perform comprehensive processing, and the response speed was insufficient.

The present invention has been made to eliminate the above-mentioned drawbacks, and its purpose is to divide plant signals into groups for each related issue and input them to a process input/output device.The process input/output device receives the signals as normal values, The signal value is normal after dividing into two areas with abnormal values and further into multiple areas.

The presence or absence of movement between two areas of anomaly or even between multiple areas (this is called a state change or simply a state change) is checked, and a state change flag is attached to a group that includes a signal in which a state change has been detected, and the data processing device The data processing device that receives the signal determines whether there is a change in status, performs detailed processing only on the group that includes the signal where the change has occurred, and quickly outputs it in an easy-to-understand format, making it easier to monitor the status of the plant. The purpose is to provide a method.

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a configuration diagram according to an embodiment of the present invention, in which a data way 8 is provided with a data transmission circuit in which, in addition to a terminal 30, a plurality (in this embodiment, two) groups of terminals 31 and 32 are provided for dividing plant signals. The data processing device 7 and the process input/output devices 41 and 42 are connected to each other, and the data processing device 7 has an alarm output device 6, and the process input/output devices ij: 41 and 42 have plant equipment,
Analog signals and/or teinotal signals 11A are collected into the same ±2 cruises of the relevant detectors.

・・11M(!:12A, 12N River Haku-'l'f
The glands are connected to each other.

The data processing device 7 also has a storage device (not shown), part of which is provided with a status change notification (or status change notification) area 5 and 52 for the two Krugs. Regarding status change notification, as mentioned above, for analog signals, two areas of normal value and abnormal value are established for each analog signal of the plant or uniformly in the analog signal, and from the normal value area to the abnormal value area, Or abnormal value 1] Not limited to the transition from the IE constant value area to the IE normal value area, but when it is divided into more areas and moved between the true areas. ” ,
When the state changes from OFF to ON, it is assumed that the situation has changed and a flag is raised. When the process input/output devices 41 and 42 detect a change in condition in units of 100 cruises, 1'fx41 and 4 are sent to the process human output.
2 is the data way 8. Terminals 30, 31, 32
When the data processing device 7 is notified of a status change via the status change notification area 51.
, 52. At this time, the process input/output devices 4] and 42 process the analog and digital signals in units of one dish and other information processing as necessary, and transfer them to the data processing unit 7 together with the status change notification flag. good.

FIG. 2 is a processing time chart according to the embodiment of the present invention, in which the horizontal axis represents the elapsed time 'l' IME, and the CW columns, starting from the top row, represent the status change notification monitoring process for all groups;
Columns oc, , oc2 are condition change detection processing for group 1.2, FT, 2 columns (j are condition change notification flag processing for groups 1 and 2, respectively, SG, , 8G2 column are signal collection for groups 1 and 2, respectively) processing, OA, ,
(JA, columns are the alarm output (generally status notification) processing of groups 1 and 2, respectively.

Among the above processes, the ()C, GC, columns are unique processes of the process input/output devices 41 and 42. IVII, , i
, Ill+2 columns perform mutual processing between the data processing device 7 and the process input/output devices 41 and 42, and other processing is performed independently by the data processing device 7.

As shown in the CW column, the data processing device 7 starts from time ``■゛1'' until l(1, and starts from time ``j゛2'' until ``1'', respectively).
As shown in column 112, all flags are 0 at this point. Next, the process input/output device 41 outputs the GC, and as shown in the column, the time '
Starting from 1゛4, the value becomes 1 for a certain signal belonging to group l at T, t ti-, that is, when a change in state is detected, F
As shown in column T7, at '1', data processing device 1
'\7 is notified of the change in status, and in response to this, the data processing device 7 stores a flag in the status change notification area 51. Thereafter, as shown in the CW column, no change in the status of the process input/output devices 41 and 42 is observed. T, the time from T6 to T6 is defined as a predetermined period τ) to '1'7, the status change notification area 51 of group 1
Referring to p Ill, since the status change notification flag is 1 as shown in the column, continue to collect signals for group I for 8G as shown in the column, and when the collection is completed, '■゛8
There are 1. As shown in column Ill, the status change notification flag is returned by 0ζ, and as shown in column OA, a 14-report signal is output to the alarm output device 6 at a predetermined instant or according to the hold, and the process ends at time +1+, o.

The alarm output device 6 is not limited to the purpose of alarm only, such as a bell, buzzer, lamp, etc., but can also be used to notify a change in the state of a wide range of signals.
You may also use one that also prints out or displays the details of the change in condition. The data processing device 7 starts processing from time T7 as shown in the CW column. By referring to the status change notification area 52 of Croup 2, 1.+111. As shown in column , the notification flag is O at this time, so signal collection for group 2 is not performed.

As time progresses further, the process input/output device 42 detects a change in the condition of a certain signal belonging to group 2 starting from time 'Jio 1' and 2, as shown in the UC2 column.
As shown in the tIl12 column, the data processing device 7 is notified of the status change at TI2, and in response to this, the data processing device 7 stores a flag in the status change notification area 52, and thereafter returns to time Ill.

to 1゛14 and T1. When a condition change is detected for separate signals belonging to group 2 from Ill to , and if only one notification flag in the condition change notification area 52 is provided in common for group 2, then FTll.

As shown in column l, the flag remains ]\. Although not shown, there are 520 messages in the status change notification area'1. (There is also a method of applying the J hook to the signals 12A and 12N in the croup, but here we will explain using only one common connection.

Thereafter, the process input/output devices [41, 42? Assuming that no change in condition is detected, the data processing device 7 first refers to the change in condition 797 knowledge area 51 of Cruise I from time T, 7 to Tu+, but 1. As shown in column I Ill, the status notification hook is 0, and then from time Ill, to C.

By the way, if you look at the status change notification area 52 of Croup 2, you will see 1,
1111. As shown in the column, the notification flag is 1, so
5 (as shown in column J2, collect signals for croup 2, and when the collection is completed, set the hook to +1+7.)
At the same time, as shown in the OA2 column, a 1i' alarm signal is sent to the alarm output device 6 at a predetermined instant or according to the hold. This is l112. after a predetermined time. ends at In this case as well, it is possible to use a device that also displays detailed printout of the content of the condition as described above.

In this way, if there is a status change signal for even one item in each of the two columns GC, UC, FZI+, , p+ after the signal is generated.
1+, the status change notification flag of each column is turned ON, and S information is sent for all signals belonging to the group whose notification flag is turned ON.

Collect the signals shown in column SG2.

As a method of signal collection, for example, process input/output device 4]
, 42 constantly collect all the signals, and when the data processing device 7 needs to collect the signals, they can be sent out continuously via the cheater way. In any case, if none of the signals belonging to a group are abnormal or change in condition, the data processing device 7 will not collect the signals of that group, but if any signal becomes abnormal or changes in condition, it belongs to the group. Collect all signals. Therefore, it is necessary to group mutually related plant signals into the same group in advance.

As mentioned above, related plant signals are grouped together and divided into multiple groups and input to the process input/output device, i. “OI”
J", 01゛] When a change in condition from PA to C) N was recognized, the Analoga 4T? - In this case, a predetermined correct and abnormal area on each side of the signal was divided into multiple areas. The status notification flag is transferred from the process input/output device N to a predetermined notification area of the data processing device for each group or signal, and the data processing device f't is transferred at a predetermined period. 7. Monitor the hook in the specified notification area, collect and process only the plant signals directed to the group whose notification flag is ON, set the 1f! The GT number is sent to the reporting device for each group or signal, and detailed data is printed and displayed as necessary, so there is no burden on the data processing device when the plant is operating stably, and when the signal status changes due to disturbances in operation. Even if these occur continuously at high speed, the data processing device can easily handle them.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram according to an embodiment of the present invention, and FIG. 2 is a processing time chart according to the embodiment configuration of the present invention. Code explanation 6: Type of output device, 7: Data processing device, 8: Data way, IIA...IIM, 12A...12N = Group 1, 2 signal, 3 (1, 31, 32: Terminal, 4)
, 42: Process input/output device, 51° 52: Status change notification area, 'riMg: Processing elapsed time, Ill. '1121 "'3 s-'1'21: Time, τ:
Periodic. Sai 1 ward

Claims (1)

[Claims] A plant status monitoring method that connects a data processing device and a process input/output device via a data transmission circuit, inputs a plant signal to the process input/output device, and sends the signal to an output device provided in the data processing device. When the process input/output device divides the plant signal into multiple groups and inputs it, it changes the state from on to off or from off to on for the digital signal among the plant signals, and from off to on for the analog signal. In this case, when movement is recognized between data areas in which each signal is divided by a predetermined boundary value, the state change of the plant signal for each group is notified to the data processing device via the data transmission circuit using a logical sum calculation method. Then, the data processing device receives the state change notification and stores it in a predetermined notification area, and also refers to the predetermined notification area every predetermined period to collect only the signals belonging to the group in which the state change has been noticed, and outputs the signal to the output device. A plant condition monitoring method characterized by transmitting data to