JPS5953576B2 - How to record changes in condition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to multiple channels in centralized monitoring systems for power, railways, steel, water treatment, etc.

Regarding a state change recording method that detects on-off and off-on state changes of a controlled device and records the contents of each state change in chronological order, in particular, the process of state change detection and its state. This system separates the process of recording changes and allows each process to be processed with high efficiency. This type of status change recording device is used in the above-mentioned centralized monitoring system of controlled systems with many channels between various industrial departments, and in recent years, the number of controlled system channels has increased significantly due to combination with telecommunication systems. Accordingly, it has become necessary to inspect, for example, several thousand points of status display data at high speed, and to detect and record all the status changes that occur moment by moment. However, conventional type change recording devices sequentially check thousands of points of status display data one by one to detect the presence or absence of a status change, detect the status change, and detect the status change of the channel. Each time a representative information character is detected, it is selected and extracted from a large number of information characters prepared for each channel and recorded.

Therefore, with the significant increase in the number of channels of the controlled system to be monitored, the following problems have arisen. In other words, (1) because a very large number of status display data points, for example, several thousand points, are checked one by one, the processing time for one scan, in which all channels are inspected, increases significantly; There is a risk of overlooking state changes that occur in the channel.

(2) Since information characters consisting of, for example, one line of text each expressing each state change in a controlled system with an extremely large number of channels are created and prepared in advance, it is necessary to have a character storage device with a huge storage capacity. There is.

There was a problem.

It is an object of the present invention to solve the above-mentioned conventional problems, to efficiently check the state and detect state changes in a controlled system with many channels, so that state changes are not overlooked, and to An object of the present invention is to provide a state change recording method that can efficiently create information characters representing state changes of a control system and can significantly reduce the storage capacity of a character storage device compared to conventional methods. .

That is, the state change recording method of the present invention divides the state changes of each channel, which are represented by sequential changes in bit signals in each of the plurality of channels to be monitored in the centralized monitoring system, into a plurality of programs each having the same plurality of channels. The program then cyclically monitors each program in sequence, detects changes in the state of each bit signal in the plotter for each program, and collects the state change data from the fukuro's identification information, time information, and state. It is once stored for each plotter together with status pattern information indicating the type of change, and then read out sequentially for each plotter, and only for channels in which a status change is recorded in the status change data, the program identification information, the bit position in the status change data, The present invention is characterized in that a channel and information characters representing the state of the channel are selected based on state change pattern information, and are edited and recorded together with characters and characters of time information. The present invention will be described in detail below with reference to the drawings.

First, an example of the basic configuration of an apparatus for carrying out the state change recording method of the present invention is schematically shown in FIG.

In the basic configuration shown in the figure, digital signals of 1 and 0 representing the on/off status of equipment in a controlled system with multiple channels are divided into N routes each consisting of m blocks each having n channels. N external on/off signal units 11, 1-2, . . . update the status display data signals for each route every scan cycle and hold the old and new cycles respectively. , 1-N are provided, and on/off signals for each route are sent from those external on/off signal sections. The status display data signal consisting of the numbers is sequentially and cyclically switched by the circulation changeover switch 2 and sent to the input port switching section 3. In the input port switching section 3, the M7'o switch status display on/off signal for each route is sent to the on/off detection section 4 and the on/off detection section 4 for each of the n new and old scan cycles at once for each program. It is supplied to the off/on detection section 5 in parallel. In the on/off detection section 4, an on/off change detection circuit having a configuration as shown in FIG. 2 is provided in parallel for each of the n-channel status display on/off signals, and the on/off change detection circuits are configured in parallel to detect the status of each on/off signal. The presence or absence of a change from on to off in the display on/off signal is detected simultaneously.

That is, in the on/off change detection circuit 4 shown in FIG. 2, the new and old data of channels 1 to n of one block are transferred to the new data block and the old data block, respectively, and the data of each channel is transferred to the new data block and the old data block. The new and old data are correspondingly shifted and supplied to an exclusive OR gate (hereinafter abbreviated as EOR gate) 11 and an inverter 12. Then, only when the new data is O and the old data is 1, both the inputs of the AND gate 13 become 1, and the AND output 1 is stored in the state change memory 14. Further, the data in the state change memory 14 is also shifted in accordance with the shift of new and old data of each channel in the new data block and the old data block. Therefore,
In state memory 4, which has storage areas (bits) corresponding to channels 1 to n, the bits of only the part of the channel that changed from on to off are stored as "1", and the other bits are stored as "0". On the other hand, in the off-on change detection circuit 5 shown in FIG. The new and old data of each channel are shifted correspondingly and supplied to the EOR gate 1] and the AND gate 3.Then, the on/off change detection circuit 4 Conversely, only when the new data is 1 and the old data is 0, both the inputs of the AND gate 13 become 1, and the AND output 1 is stored in the state memory 4. Similarly to the status memory 14, the data in the status memo 1 and 4 are shifted in accordance with the shift of new and old data in each channel in the new data block and the old data block. Therefore, channel 1~
State changing memory 1 having a storage area (bit) corresponding to n
4'', the bits of only the portion of the channel that changed from OFF to ON are stored as ``1'', and the other bits are stored as ``O''. In the above-mentioned on-off detection section 4 and off-on detection section 5, when there is a state change in any of the bit signals of each channel in the program, the state change is detected by the state memory 4, This can be easily done by monitoring whether any bit in 14" has become "゜1"), state change memo 1 river 4, 14"
The information is supplied in parallel to the status change registration unit 7, which includes an identification signal for each block, a signal indicating whether the change is on/off or off/on, and a signal indicating the status change detection time from the timer 6. It is stored sequentially for each block, along with the required information signals, for example as will be described below with reference to FIG.

When the status change registration for each program is completed, the circulation changeover switch 2 is switched, and the status change detection registration as described above is sequentially repeated for the status display and data signal of m blocks of n blocks each on the next route. It is done cyclically.
As described above, the status change data signals registered in the status change registration unit 7 sequentially for each block are sequentially read out and supplied to the character editing unit 8, as will be described later with reference to FIG. The information characters representing the state of the controlled system are edited, sent to the printing section 9, and sequentially printed and recorded. Next, the state display data signal of the block whose state change has been detected as described above is expressed as 2 as shown in FIG.
It is registered and stored in the condition change registration unit 7 as data having such a configuration. In other words, the information registered in the status change registration unit 7 is
As shown in FIG. 4, the route number ROOTN, the state change pattern number 5JPATN that indicates the mode of state change from on to off or from off to on, the state change word number JPATWN that identifies the block to which the state change data belongs, and the state change Status change data JHE indicating that it was heated as “゜1゛”
Time TIM indicating the time when ND and state change were detected
Consists of E. The routes 1 to N shown in FIG. 1 and the block numbers 1 to m within these routes are registered in the route number ROOTN and the state change word number JPAT)WN, respectively. Timer 6 when a state change is detected in OFF detection section 5
The time will be registered.

For example, the status change pattern number JPATN is "1" when the status change data representing the state change from on to off is registered, and when the status change data is registered for the status change data representing the state change from off to on. Sometimes "2" is written,
Condition change data J according to this condition change pattern number JPATN.
The contents of the status change memory 14, which is the output of the on-off detector 4, or the contents of the status change memory 14, which is the output of the off-on detector 5, are written in HEND.

This status change data JHEND is composed of the same number of bits as the number of bits in the plotter, and when a bit in the program changes status, "゜1゛" is added to the corresponding bit in the status change data JHEND. Therefore, if you want to detect both on-to-off and off-to-on status changes for one block, two status change registration configuration blocks as shown in Figure 4 are required. Assuming that the number of routes is N and the number of processes in each route is m, the state change registration section 7 in FIG. (2.times.N.times.m) are sequentially registered and sequentially read out.The above-described registration operation in the state change registration section 7 is shown in the flowchart of FIG.

First, the circulation changeover switch 2 is the external on/off signal section 1-1.
is selected, and the new and old data of the gas filter 1 on the route 1 are transferred to the on/off detection section 4 and the off/on detection section 5 via the input port switching section 3 (step S1). The detection units 4 and 5 are configured as shown in FIGS. 2 and 3, respectively, and compare new and old data for each channel and store the comparison results in a status change memo 4, 14". Therefore, the condition change memo I river 4, 14'' has a storage area of n bits corresponding to each channel, and the comparison results of channels 1 to n are stored in the corresponding storage area. Next, the presence or absence of a change from ON to OFF is detected by determining whether there is "1" in the state change memory 14 (step S2), and "
If there is ゜1゛, it means that one of the channels has changed from ON to OFF, so the status change registration section 7 contains route number 1 and status change pattern number 1 (indicates a change in status from ON to OFF). ), state change word number 1 (indicates fukukomatsu 1), state change data (contents of state change memo 1 river 4), and time in the 4th
Register in the format shown in the figure (step S4).
, proceed to step S4. Furthermore, in step S2,
If there is no "1" in the status change memory 14, that is, if there is no status change from on to off in any channel, the process proceeds to step S4 without registering in the status change registration section 7 as shown in step S3. Proceed to. In step S4, the presence or absence of a change from OFF to ON is detected by determining whether there is a "1" in the state change memory 14'', and if there is a "1", an OFF to ON change is detected in any channel. Since there has been a change to ON, the status change registration section 7 contains route number 1, status change pattern number 2 (indicating a status change from OFF to ON), status change word number 1 (indicating PROC 1), The state change data (contents of the state change memo 4'') and time are registered in the format shown in FIG. 4 (step S5), and the process proceeds to step S6. Registration may be performed in order from the top of the memory area.Also, if there is no ``1'' in the status change memo I river 4'' in step S4, that is, there is no status change from OFF to ON in any channel. In this case, the process proceeds to step S6 without performing registration in the status change registration section 7 as shown in step S5. This allows route 1
Since the status change registration process for block 1 has been completed, it is then determined in step S6 whether the block number is the final one. In this case, the block number is 1, which is not the final one, so 1 is added to the block number in step S7, the process returns to step S1, and the same process is performed for plotter 2 of route 1. Continue up to the block number. If it is determined in step S6 that the last route number has been processed, the process advances to step S8, where it is determined whether the route number is the last. In this case, the route number is 1, which is not the final one, so proceed to step S9, select route 2 by switching the input port with circulation changeover switch 2, add 1 to the route number to make it 2, and set the program number to 1.
(Step S1O) Returns to step S1 and performs the same process for block 1 of route 2. By repeating this process, when the final route number reaches the final block number, it is determined in step Sll whether or not to terminate the status change registration, and if it cannot be terminated, the input port is switched by the circulation changeover switch 2. The route 1 is selected (step Sl2), the route number and the block number are set to 1 (step Sl3), and the process returns to step S1 to perform the same processing as before. At this time, the condition change registration unit 7
The memory of is configured so that it can be rewritten cyclically. Each state change registration block as shown in FIG. 4 registered in the state change registration section 7 is read out in sequence and sent to the character editing section 8 shown in FIG. 1 for editing. The editing work in section 8 will be explained with reference to FIG.

First, the print format in the present invention is defined as "time, route name, item, action (ON/OFF)".

Of the information in the status change registration unit configuration block 21 shown in FIG.
It is used to read the corresponding time character from 6. As for the route name, the corresponding route name character is read out from the route name character storage section 22 based on the route number ROOTN. For an item, the number route, the number proc, and the number channel are predetermined, such as the generator at location m of N power plant, so the basic character of this item is The address of the stored item basic character storage section 25 is stored in the basic character address specifying section 24, and is corresponded to by the root number ROOTN, the state change word number JPATWN, and the state change data JHEND in the state change registration configuration block 21. The basic character address is read out, and the corresponding basic character is read out from the item basic character storage section 25 using this address and set as an item.

For this purpose, a total of (N×M×n) basic character storage addresses are stored in the basic character address designation section 24 for each channel of each block of each route.

At this time, the basic character storage number corresponding to only those channels for which "1" is entered in the status change data JHEND among channels 1 to n is read out.In addition to the item basic character, the item basic character storage number is Character number designation information and on/off operation character number designation information are provided, and the character number designation information is used to designate the number of characters when printing an item.

In addition, as an item, for example, there is a power source or a generator, and in the case of a power source, the state is expressed as on or off, and in the case of a generator, it is expressed as open or closed, so if the item is a power source, The on-character and off-character parts of the movement character storage section 23 are specified by the on/off movement character number designation information, and the state change pattern number JP is also specified.
The ATN determines whether this status change registration configuration block 21 indicates a status change from on to off or from off to on, and if the status change is from on to off, the off character is set. select.

The thus selected time character, route name character, item character, and operation character are edited into the print format as described above and sent to the printing section 9 for printing.

By performing such processing for each status registration component block in the status change registration section 7, the time, route name, item, and operation at which the status change occurred are printed for the channel where the status change occurred.

In general, the aforementioned centralized monitoring systems in each industrial sector constantly monitor the occurrence of state changes in the controlled systems of an extremely large number of channels, but in reality, it is impossible to predict when such state changes will occur. Therefore, it is necessary to keep the scan cycle of cyclically scanning and detecting the presence or absence of state changes as short as possible to ensure that the controlled system of each channel is constantly monitored so that nothing is overlooked. However, such states do not occur successively very frequently, and compared to the state change detection processing process, the state change data processing process after the state change detection has a comparatively more time leeway.

In other words, in the state change detection processing process, even if the states of n channels are detected all at once, the frequency at which a state change occurs in any of the n channels is quite low.
If the state change data after state change detection is registered and once stored, even if it takes time to create an information character based on the state change data thereafter, there is no risk of disturbing the scan cycle of state detection. Therefore, in the state change recording method of the present invention, although it takes some time to create an information character through the process shown in FIG. This allows the character content to be significantly reduced. As is clear from the above description, according to the present invention, the status display data of multiple channels to be centrally monitored can be detected in units of blocks for each multiple channel, and can be cyclically monitored with a much shorter scan cycle than in the past. By monitoring, it is possible to prevent state changes from being overlooked, and by taking advantage of the relatively low detection frequency of state changes, a relatively small number of information characters representing the state of each channel are created based on the data of detected state changes. The amount of characters that need to be memorized in advance can be greatly reduced compared to the conventional method by editing from the basic characters of It is possible to realize cost reduction and cost reduction.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a block diagram showing an example of the basic configuration of an apparatus for carrying out the state change recording method of the present invention, and FIGS. FIG. 4 is a plot diagram showing an example of the structure of the state change detection data, FIG. 5 is a plot diagram showing an example of the state change information character editing mode, and FIG. FIG. 6 is a flowchart for explaining the registration operation in the status change registration section. 1-1,..., 1-N... External on/off signal section, 2... Circulation changeover switch, 3... Input port switching section, 4... On/off detection section , 5... off...
ON detection unit, 6... timer, 7... status change registration unit, 8
...Kiyaratata Editorial Department, 9...Printing Department, 11...
Exclusive OR gate (Exclusive OR gate)
, 12... Inverter, 13... AND gate, 1
4,14Z...Status change memory, 21...Status change register configuration block, 22...Route name character storage section, 23
...Operation character storage section, 24...Basic character address specification section, 25...Item character storage section, 26
...Time character storage section.

Claims (1)

[Claims] 1. In a centralized monitoring system, changes in the state of each channel represented by sequential changes in bit signals in each of the channels to be monitored are divided into multiple blocks of the same multiple channels, and each block is sequentially cyclically processed. The system monitors each block, detects changes in the status of each bit signal in each block, and collects the status change data with block identification information, time information, and status change pattern information indicating the type of status change. Once stored in each block, it is sequentially read out in blocks, and only for channels for which a state change is recorded in the state change data, the channel and A state change recording method characterized in that information characters representing channel states are selected and edited and recorded together with time information characters.