JPS60196032A - Plant data collecting device - Google Patents

Abstract

PURPOSE:To collect the plant data of a fault mode in a short cycle and those of a normal mode in a long cycle respectively through simple constitution, by providing a high-speed data area and a low-speed data area within a memory when various types of plant data are collected for a fixed period. CONSTITUTION:An operator operates a console, etc. not shown in the figure to collect and reproduce the plant data in a long cycle and for a long period. In such a case, a low-speed record starting request (b) is supplied to a low-speed input means 4. Then the means 4 reads successively each digitized plant data (c) out of an analog input part 1 in a low-speed recording cycle stored in a low- speed recording cycle memory part 4A. While the operator operates the corresponding console to collect and reproduce the plant faults in a short cycle. Thus a high-speed record starting request (j) is delivered to a high-speed input means 8. Then the means 8 reads successively the plant data (k) out of the part 1 in a high-speed recording cycle stored in a high-speed recording cycle memory part 8A in response to the request (j).

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a plant data acquisition device suitable for acquiring various plant data over a certain period of time.

[Technical background of the invention and its problems] In complex, large-scale plants such as thermal and nuclear power plants, various performance tests are conducted at any load range from start-up to full load during trial operation leading up to the start of commercial operation. Confirmation tests are repeated. At this time, plant emergency/shutdown tests are also conducted to simulate abnormal situations.

Furthermore, at this time, due to equipment malfunction or insufficient adjustment, abnormal development may actually occur, leading to plant shutdown. In this way, during plant trial operation, and also during normal plant operation, various detectors placed in various parts of the plant It is necessary to collect and store thousands of plant data points, and for this reason, a plant data acquisition device is provided.

However, in conventional plant data acquisition devices, the data acquisition cycle is constant, so if the cycle is lengthened, it becomes impossible to collect plant data that changes in short cycles, and as a result, data that fluctuates greatly in a short period of time during plant abnormalities. It becomes difficult to understand the plant status. On the other hand, if the data acquisition cycle is shortened, it becomes impossible to acquire plant data over a long period of time, which also causes problems in plant performance confirmation tests. In this case, if the capacity of the data acquisition memory is increased, it is possible to shorten the data acquisition cycle and acquire data over a long period of time, but this requires a huge amount of memory capacity and there is almost no change in the data acquisition cycle. This resulted in the acquisition of an unnecessarily large amount of plant data, leading to problems such as a decrease in data analysis efficiency.

[Object of the Invention] It is an object of the present invention to provide a plant data acquisition device that has a simple configuration and is capable of acquiring plant data during abnormal times in a short cycle and plant data during normal times in a long cycle.

[Summary of the Invention] For this reason, the present invention provides a high-speed data area and a low-speed data area inside the memory, and in this low-speed data area, data acquisition is performed in long cycles until data is recorded in all areas according to a data acquisition command. On the other hand, plant data is cyclically stored in the high-side data area in a short cycle by a data acquisition command, and the plant data is constantly monitored, and when a plant abnormality is detected,
A feature of this system is that data acquisition before and after the occurrence of a plant abnormality can be retained by discontinuing data acquisition at a predetermined number of items after an abnormality is detected.

[Embodiments of the invention] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration diagram of a plant data acquisition device according to an embodiment of the present invention, in which 1 scans various analog signals a obtained from a large number of detectors arranged in a plant and converts them into digital data. This is an analog input section that converts and reads plant data. A memory 2 stores plant data read through the analog input section 1, and has a high speed data area 2A and a low speed data area 2B as shown in FIG. 3 is an output unit for reproducing the plant data stored in the memory 2; 4 is a low-speed input means for reading plant data at a preset low-speed recording cycle, and the low-speed recording cycle is stored in a low-speed recording cycle storage section 4A.
is memorized. 5 is a low-speed data writing/reading means for cyclically writing or reading the plant data obtained from the low-speed input means 4 into the low-speed data area 2B of the memory 2; 5A is a low-speed data start address storage unit; 5B is a low-speed data end This is an address storage section. 6 indicates whether all plant data has been written to or read from the low-speed data area 2B of memory 2;
Low-speed data end detection means 1.7 for detecting the end of writing and reading is the low-speed data writing/reading means 5.
This low-speed data output means outputs data read from the low-speed data area 2B of the memory 2 to the output section 3 via the low-speed data area 2B of the memory 2.

8 is a high-speed input means for reading plant data at a preset high-speed recording cycle, and 8A is a high-speed recording cycle storage section. 9 is a high-speed data writing/reading means for cyclically writing or reading plant data obtained from the high-speed input means 8 into the high-speed data area 2A of the memory; 9A is a high-speed data start address storage section;
B is a high speed data end address storage section. Reference numeral 10 denotes high-speed recording end detection means for detecting plant abnormalities by monitoring plant data read at high speed by the high-speed input means 8, and detecting the end of high-speed recording based on the number of times of recording after abnormality detection; IOA is an abnormality detection level memory Section 10B is a recording number storage section after abnormality detection. Reference numeral 11 denotes high-speed data end detection means for detecting whether all plant data in the high-speed data area 2A of the memory 2 has been read out. , 12 are connected to the memory 2 via high-speed data writing/reading means 9.
This is high-speed data output means for outputting data read from the high-speed data area 2A to the output section 3.

In order to collect and reproduce plant data at long intervals over a long period of time with the above-described planting, when an operator operates a console or the like (not shown), a low-speed recording start request is input to the low-speed input means 4. As a result, the low speed input means 4 uses the low speed recording period stored in the low speed recording period storage section 4A.
Each digitized plant data C is sequentially read from the analog input section 1. At the same time, the low-speed input means 4 issues a write request d to the low-speed data writing/reading means 5, and the low-speed plant data C read at the low-speed recording cycle.
are passed sequentially. 29, the low-speed data writing/reading means 5 writes the low-speed data C to the low-speed data area 2B of the memory 2 while sequentially counting up memory addresses from the start address stored in the low-speed data start address storage section 5A. Write it down and do it. At this time, the low-speed data end inspection means 6 detects the address e counted up from the low-speed data writing/reading means 5.
and the stored end address f are taken out, the completion of one cycle of writing is detected, and an end request g is sent to the low-speed input means 4, and a start request is sent to the low-speed data output means 7. In response to this termination request g, the high-speed input means 4 terminates reading of the low-speed data C from the analog input section 1. On the other hand, the low-speed data output means 7 issues a read request i to the low-speed data write/read means 5 in response to this start request. In response to this, the low-speed data writing/reading means 5 sequentially reads out the low-speed plant data recorded in the memory 2 and the low-speed plant data C stored in the low-speed data start address storage section 5A from the start address, and outputs the low-speed data. The low-speed data output means 7 sequentially outputs these low-speed data C to the output section 3. At this time, the low-speed data end detection means 6 detects the end of one cycle of reading by determining whether the read address and the end address in the low-speed data writing/reading means 5 match, as in the case of writing, and transmits the end request at a low speed. The data is output to the data output means 7. The low-speed data output means 7 terminates output of the low-speed data C in response to this termination request. In this way, it becomes possible to acquire and reproduce plant data over a long period of time using low-speed recording cycles.

On the other hand, if it is desired to collect and reproduce plant abnormalities in a short period, the operator issues a high-speed recording start request j to the high-speed input means 8 by operating the corresponding Bonsor. Then, in response to this high-speed recording start request j, the high-speed input means 8 sequentially reads the plant data k from the analog input section 1 at the high-speed recording cycle stored in the high-speed recording cycle storage section 8A. A write request Q is issued to the data writing/reading means 9, and high-speed data k is sent.
As a result, the high-speed data writing/reading means 9 sequentially counts up the memory addresses of the memory 2 from the start address stored in the high-speed data start address storage section 9A, as in the case of writing the low-speed data C. While writing the high-speed plant data k to the high-speed data area 2A, this write operation continues continuously. Therefore, after writing data to the end address, return to the start address again and place the next data second. Cyclically high-speed data k
is written into high-speed data area 2A.

At this time, the high-speed recording end detection means 10 monitors the high-speed data k taken in by the high-speed input means 8, and executes the processing shown in FIG. 3. That is, the 31st! In order to initialize counters, registers, flags, etc. when executing the process of i,
First, the process 300 is passed with a yes, and a backfire pass flag is set (301). The plant abnormality detection flag is reset (302). Clear the recording count counter (3
03). As a result, the data k is retrieved (305) and compared with the abnormality detection level stored in the abnormality detection level storage section 10A to determine whether the high speed data k exceeds the abnormality detection level (306). As a result, if the high-side data k does not exceed the abnormality detection level, the plant status at this time is determined to be normal, and after exiting this processing block, a high-speed This processing block is entered again every time the input means 8 inputs high-speed plant data k. and.

At this time, the second pass flag is set, so
After processing 300 is passed with no and processing 304 to 304 are executed, the abnormality of the plant state is determined in processing 306. While repeating such processing operations, if the high-speed data k exceeds the abnormality detection level, a plant abnormality detection flag is set (307). As a result, the next time this processing block is entered, processes 300 to 304 are
By passing through point o and incrementing the recording counter by one, the number of data read by the high-speed input means 8, that is, the number of times data has been written to the high-speed data area 2A is counted (308). Next, the process of incrementing the recording counter every time data is input to the high-speed input means 8 is repeated until this count value matches the number of times stored in the recording number storage unit 10B after abnormality detection, and when the count value matches, the process 309 is performed. The process passes with YES and the termination request m is not issued to the high-speed input means 8 (310). It also issues a start request n to the high-speed data output means 12 (311). After that, in preparation for inputting the next high-speed recording start request j, the back door bus flag is reset, that is, the first pass flag is cut (312
), all processing here ends.

When the high-speed input means 8 receives the termination request m from the high-speed recording end detection means 10, it stops inputting the high-speed plant data and cancels the write request.

Thereby, the high-speed data writing/reading means 9 finishes writing the high-speed plant data to the high-speed data area of the memory 2 for the two people.

As a result, the high-speed data area 2A of memory 2 has the fourth
As shown in the figure, data before and after a plant abnormality is recorded over a predetermined period of time. That is, plan 1 data is written in order from the start address SA1 of the high-speed data area 2A, and when it reaches the end address EA1,
Writing is performed again cyclically in order from star 1 to address SA+, and the previously recorded data is updated. In this state, if a plant abnormality is detected according to data B to high-speed plan 1 input to high-speed input means 8,
From this point on, recording is performed for the number of times stored in the number of recording times after abnormality detection storage section 10B, and when the high-speed plant data N is recorded, the recording ends. At this time, the high-speed data writing/reading means 9 uses the last high-speed plan 1.
The address where data H was written to is the end address 1E.
A2 and the next data storage location as star (
- High-speed data start address storage section 9Δ and high-speed data end address storage section 9 as address SA2, respectively.
6 Therefore, in the high-speed data area 2, centering on the plant abnormality detection data L, previous plant data is recorded to star 1 up to address SA2, and subsequent data is recorded up to end address EA2. Saved.

On the other hand, when the high-speed data output means 12 receives a start request n from the high-speed recording end detection means 10, the high-speed data output means 12 performs a high-speed data write/write operation.
A read request O is issued to the read means 9. As a result, the high-speed data writing/reading means 9 transfers the high-speed plant data k from the address SA2 to the star 1 stored in the high-speed data start address storage section 9A.
are read in order and output to the high-speed data output means 12. The high-speed data output means 12 outputs this high-speed plan 1-data to the output section 3, thereby reproducing the plant state before the plant abnormality. At this time, the high-speed data end detection means 11 compares the address p counted up by the high-speed data writing/reading means 9 and the stored end address q (EA 2 ) in the high-speed data end address storage section 9BL'. As a result, when one cycle's worth of data has been read, a termination request r is issued to the high-speed data output means 12. In response to this termination request r, the high-speed data output means 12 stops outputting high-speed plant data.

In this way, when an abnormality occurs in the plant.

It becomes possible to collect and reproduce detailed plant data before and after that at a high-speed recording cycle.

Figure 5 shows how plant data is collected as described above, and the data collected at a low speed recording cycle from star 1 to at L node SA to end address EA is recorded in the low speed data area 2B. Ru. On the other hand, the high-speed data output means 12 records Plan 1 to data before and after the occurrence of a plant abnormality at a high-speed recording cycle. Therefore,
If these are reproduced from the output unit 3, the normal plant condition can be reproduced over a long period of time, and the plant condition before and after the plant abnormality can be reproduced in detail, and test data and data for development analysis can be accurately reproduced with a small memory capacity. You will be able to get it.

By the way, in the above embodiment, if the high-speed input means 8 and the low-speed input means 4 read the plant state and write it to the memory at the same timing,
In order to prevent problems caused by such conflicts, the high-speed input means 8 and the low-speed input means 4 communicate with each other via interlock information S that if the other party is reading the plant status and writing it to the memory, the processing ends. Wait until then and process them alternately. Similarly, when the high-speed data output means 12 and the low-speed data output means 7 read out the plant state from the memory and reproduce it, if the other party reads the plant state from the memory and reproduces it via the interlock information, Wait until the processing is completed and perform the processing alternately.

Incidentally, in the above embodiment, two high-speed recording cycles and a low-speed recording cycle are used.
Although an example has been described in which plant data is acquired in different types of recording cycles, each plant data may be acquired in each dedicated data area of the memory in a plurality of types of recording cycles. Further, at this time, it goes without saying that each plant data recorded in each recording cycle can be recorded by arbitrarily setting the number of times of recording after abnormality detection.

[Effects of the Invention] As described above, according to the present invention, it is possible to reduce the memory capacity and collect the plant status during normal operation over a long period of time, and also to collect the status of the plant before and after an abnormality occurs in detail in a short period. This provides a plant data acquisition device that can accurately grasp the plant status at all times.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram of a plant data acquisition device according to an embodiment of the present invention, FIG. 2 is a recording format diagram of the memory of FIG. 1, and FIG. 3 is a processing of the high-speed recording end detection means of FIG. 1. FIG. 4 is a flowchart showing the operation, FIG. 4 is an explanatory diagram of data recorded in the high-speed data area of FIG. 2, and FIG. 5 is an explanatory diagram of the acquisition state of data acquired in the memory of FIG. 1. 1...Analog input section, 2...Memory, 2A...
High speed data area, 2B...Low speed data area, 3.
... Output unit, 4... Low speed input means, 4A... Low speed recording cycle storage section, 5... Low speed data writing/reading means, 5A... Low speed data start address storage section, 5B... Low speed Data end address storage section, 6...
- Low-speed data end detection means, 7... Low-speed data output means, 8... High-speed input means, 8A... High-speed recording cycle storage section, 9... High-speed data writing/reading means. 9A...High speed data start address storage section. 9B...High speed data end address storage section, 10...
・High-speed recording end detection means, IOA...abnormality detection level storage unit, IOB...recording number storage unit after abnormality detection, 11
. . . High-speed data end detection means, 12 . . . High-speed data output means. Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] (1) In a plant data acquisition device that periodically collects data from each part of a plant and records it in a memory, the memory is provided with at least a high-speed data area and a low-speed data area, and the data is collected in the low-speed data area at a low-speed recording cycle. means for cyclically recording data collected at a high-speed recording peripheral speed in the high-speed data area; and means for monitoring the data collected at the high-speed recording cycle to detect plant abnormality; A plant data acquisition device comprising: means for terminating recording in the high-speed data area when data for a predetermined number of times has been recorded after detecting the plant abnormality. (2. A plant data acquisition device according to claim 1, characterized in that the memory is provided with a plurality of data areas for recording data in a plurality of recording cycles.