JPH01260320A - Trip sequence recording apparatus - Google Patents

Abstract

PURPOSE:To properly perform work at the time of the estimation and analysis of the cause of an accident, by obtaining a corrected trip sequence log wherein an event change occurring time is corrected to the standard time. CONSTITUTION:A clock device 11 equipped with correction function receives FM broadcasting and detects a time signal to correct its internal time. This time data is outputted to the time correction means 12 of a process computer 2 and, when a re-recording instruction signal is inputted from an input device 13, the time correction means 12 calculates the difference between the time data of an internal clock circuit 5 and that of the clock device 11 equipped with correction function at that point of time to correct the time data of the trip sequence data stored in an auxiliary memory apparatus 14 on the basis of said time difference and outputs the correction result to a trip sequence log re-editing means 15. The trip sequence log re-editing means 15 forms corrected trip sequency log data on the basis of the trip sequence data after correction to output the same to a printer 6.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a trip sequence recording device.

(Prior Art) For example, in an industrial plant such as a power generation plant, an emergency such as an accident occurs in the plant. When a trip occurs, many relays, which are used for plant control, monitoring, and protection, are activated in a short period of several seconds to several tens of seconds, depending on the circumstances of the emergency situation. The on/off state changes at time intervals of about milliseconds.

In this way, when a trip occurs in a plant, the switching layers of many relays change, so in order to obtain information to investigate the cause of the trip,
A trip sequence recording device is installed in a plant, and is installed in a plant to detect changes in the on/off state of a relay and to record and output the contents of the change along with the time of the state change in chronological order. A conventional example thereof is shown in FIG.

In the figure, on-off state signals DP from a large number of relays installed in a plant (not shown) are applied to a process input device 1.

When the on/off state signal DP of each relay changes, the process input device 1 generates an interrupt signal IT corresponding to the changed relay, and outputs the interrupt signal IT to the state change detection means 3 of the process computer 2.

When the interrupt signal IT is input from the process input device 1, the state change detection means 3 determines the relay that caused the interrupt signal, and if the relay changes its on/off state when a trip occurs, the state change detection means 3 detects the relay corresponding to that relay. The input type information and its on/off information are output to the trip sequence log editing means 4.

When the input type information and on/off information are input from the state change detection means 3, the trip sequence log editing means 4 reads the current time from the internal clock circuit 5, and writes one line of trips consisting of the time, input type, and on/off state. Forming sequence log information and outputting it to the printer 6,
As a result, the printer 6 records and outputs information for one line of the trip sequence log.

Also, the trip sequence log editing means 4.

When the first input type information and on/off information are entered, the header information of the trip sequence log is sent to the printer 6.
As a result, predetermined header information is recorded at the beginning of the trip sequence log.

The operation of this trip sequence log editing means 4 is continuously executed until a series of trip sequences is completed, and thereby a trip sequence log consisting of a time series display of on/off state changes of the relay is recorded and output from the printer 6. .

In this way, when a trip occurs in the plant, a trip sequence log is obtained for analyzing the trip.

Now, when an accident occurs at a plant, it is necessary to report the accident analysis results to government agencies. For this reason,
Among the contents of the report, the time in the trip sequence log portion must be written in standard time.

(Problem to be Solved by the Invention) However, the internal clock circuit 5 that the process computer 2 is equipped with may not match the standard time accurately, and in such cases, the accuracy of the time recorded in the trip sequence log is poor. This has caused problems in estimating the cause of the accident and hindering the analysis and investigation work.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a trip sequence recording device that can solve the problems of the prior art and make the recorded time of a trip sequence log accurately match the standard time.

[Structure of the Invention] (Means for Solving the Problem) The present invention comprises a standard clock device that generates a standard time, a storage device that stores trip sequence information, and a command device that instructs re-recording of the trip sequence information. , trip sequence information stored in the trip sequence information storage means based on the deviation between the standard time information generated from the standard clock device and the time information of the internal clock circuit when re-recording is commanded by the command means. A re-editing means is provided for correcting the event change occurrence time and recording and outputting the corrected trip sequence information obtained thereby.

(Effect) Therefore, by specifying re-recording, it is possible to obtain a corrected trip sequence log in which the event change occurrence time is corrected to the standard time, which makes it possible to appropriately estimate the cause of the accident and perform analysis and investigation work. can.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a trip sequence recording device according to an embodiment of the present invention. In addition, in this figure, the same parts and corresponding parts as in FIG. 8 are given the same reference numerals.

In the figure, a clock device with a correction function 11 has a function of receiving FM broadcasting from the Japan Broadcasting Corporation, detecting a time signal broadcast at least once a day, and correcting the internal time in accordance with the time signal. The time information is outputted to the time correction means 12 of the process calculation 11!2.

The input device 13 is used by the operator to input a command to re-record the trip sequence, and the command signal is applied to the time correction means 12.

The auxiliary memory bag M14 stores trip sequence information (described later) created by the trip sequence log editing means 4.

When the time correction means 12 receives a re-recording command signal from the input device 13, the time correction means 12 changes the time information and correction function of the internal clock circuit 5 at that time! ! 11, corrects the time information of the trip sequence information stored in the auxiliary storage device 14 based on the time deviation, and outputs the correction result to the trip sequence log re-editing means 15. .

The trip sequence log re-editing means 15 forms modified trip sequence log information based on the modified trip sequence information inputted from the 1-time correction means 12, and the modified trip sequence log information is output to the printer 6. Ru.

FIG. 2 shows the input type table TI referred to by the state change detection means 3. This input type table TI is
Process input device! Input types ABBI to ABBn are arranged to indicate the type of each interrupt signal IT according to the connection number 1-n of the interrupt signal IT inputted from 1. Also, each input type ABBI~AB
Bn also includes information as to whether the on/off state changes when a trip occurs.

FIG. 3 shows an example of trip sequence log information formed by the trip sequence log editing means 4.

This trip sequence log information includes the date when the first input type and on/off information were input from the state change detection means 3, the first change date DATE, and the time when the first input type and on/off information were input. ,
First change time TIM in "1 o'clock", "minute", "second"
E. Input type, input time (change time) of on/off information, and input type.

It also includes a time series information section DD that summarizes the on/off states for each period.

In addition, the change time of the 2-time series information section DD is the first change time T
This is the elapsed time from the IME in milliseconds. That is, the initial change time TIME is expressed in seconds, and the change time is expressed in milliseconds.

Figure 4 shows the trip sequence log recording format % formula % The trip sequence log is from the trip sequence log part CT in which the title HD, date OA, time of each change, input type, and on/off status are listed in one line. Become.

In addition, the input type tr displayed in the trip sequence log
i, code information that allows the operator to determine the content.

FIG. 5 shows the processing executed by the 1-time correction means 12.

When the re-recording command signal is input from the input device 13, the time correction means 12 first performs a process 101 for extracting the standard time from the correction function clock device 11) and a process 102 for extracting the internal time from the internal clock circuit 5. ), the time deviation Δt between the standard time and the internal time is calculated (process 103).

Next, the variable m is initialized to 1 (process 104), and the change time T+++ of the first element of the time series information OD of the trip sequence log information is retrieved from the auxiliary storage device 1114 (process 105). A corrected change time Tm' is calculated by adding the time deviation Δt to Tm (processing 106).

Then, the variable I is incremented (107), and the result is the time series information DD of the trip sequence log information.
Check whether the number of elements exceeds (Judgment 108)
When the result of the first judgment 108 is NO, the process returns to the process 105 to correct the change time of the next element.

Further, when the result of the judgment 108 is YES, since the correction of the change times of all elements has been completed, the corrected trip sequence log information in a state corrected to the change time after the correction is output to the trip sequence log re-editing means 15. do.

In this way, the time correction means 12
The change time of the trip sequence log information stored in the trip sequence log information 4 is corrected, and the corrected information is output to the trip sequence log editing means 15.

With the above configuration, for example, as shown in FIG. 6(a),
When the internal time is 100 milliseconds behind the standard time, the internal time is January 1987, 183:04:56.5.
A trip occurs at 0 milliseconds and the input type ABTo changes to on (1), and at the same 100 milliseconds, the input type ABTo changes to ON.
I changes to OFF (Change 2), and at the same 150 milliseconds, the input type ABRz changes to ON (Change 3), the trip ends, and then the internal time changes to January 1987, 183:04:5.
Consider the case where the operator inputs a command to re-record at 6 seconds and 800 milliseconds.

At this time, each change 1. Change 2. Change 3 is detected by state change detection means 3, and each input type A
BB3. ABBI, ABB2, and the on/off state ON, OFF, ON are sequentially output to the trip sequence log editing means 4.

As a result, the trip sequence log editing means 4 forms trip sequence log information as shown in FIG.
A trip sequence log as shown in FIG. 6(e) is recorded and outputted from the printer 6.

Further, when the operator inputs re-recording from the input device 13 and a re-recording command signal is input, the 1-time correction means 12
extracts the trip sequence log information stored in the auxiliary storage device M14 and executes the above-described processing to form modified trip sequence log information.

In this case, the standard time at the time the re-recording command was input was 3:04:56, 900 milliseconds, and the internal time was 800 milliseconds.
Since it is a millisecond, the time deviation t is 100 milliseconds.

As a result, the 1-time correction means 12 forms modified trip sequence log information that is corrected to a value obtained by adding 100 milliseconds to the change time of each element of the trip sequence log information,
As a result, the printer 6 records and outputs a modified trip sequence log as shown in FIG.

In this way, in this embodiment, the trip sequence log is recorded and output from the printer 6 when a trip occurs, and when a command is input to re-record the trip sequence log after the trip ends, the change time is corrected to the standard time. A trip sequence log is recorded and output.

Therefore, by referring to this modified trip sequence log, it is possible to appropriately estimate the cause of the accident and conduct analysis and investigation.

Note that the time deviation of the internal clock circuit 5 may change during the time from the start of the trip until the re-recording command is input, and an error may occur in the time correction of the time correction means 12. The time until a recording command is input is generally short, and the time deviation of the internal clock circuit 5 hardly changes during this time, so there is no problem in practice.

FIG. 7 shows a trip sequence recording device according to another embodiment of the present invention. In addition, in the same figure, the first
Identical and corresponding parts to those in the figures are given the same reference numerals.

In this embodiment, a re-recording command signal from the input device 13,
The output time of the correction function clock device 11 is applied to the internal clock circuit 5 and the time correction means 12.

Further, the time correction means 12 outputs a command to the trip sequence log re-editing means 15 to start the operation.

With the above configuration, a trip occurs and the state change detection means 3
When the input type and on/off information are output sequentially,
The trip sequence log editing means 4 forms trip sequence log information similar to that described above and stores it in the auxiliary storage device 14.
At the same time, the trip sequence log is recorded and outputted from the printer 6.

After the trip ends, when the operator inputs a command to re-record from the input device 13, a re-record command signal is output from the input device 13 to the internal clock circuit 5 and the time correction means 12.

As a result, when the internal clock circuit 5 receives a time request command from the time correction means 12 and outputs time information, the internal clock circuit 5 inputs the standard time from the correction function clock device 11 and initializes the internal time to the standard time.

Further, the time correction means 12 inputs the internal time from the internal clock circuit 5 and the standard time from the correction function clock device 11, calculates the time deviation in the same manner as in the above-mentioned embodiment, and outputs the result. is used to correct the change time of the trip sequence log information stored in the auxiliary storage device 114, and the change time of the trip sequence log information is rewritten with the correction result.

When the time correction means 12 finishes rewriting the trip sequence log information, the time correction means 12 starts the operation of the trip sequence log re-editing means 15.

Thereby, the trip sequence log re-editing means 15 uses the corrected trip sequence log information stored in the auxiliary storage device i14 to form a corrected trip sequence log, and causes the printer 6 to record and output the corrected trip sequence log.

In this manner, in this embodiment, when a command is input to re-record the trip sequence log, the time of the internal clock circuit 5 is calibrated, and a corrected trip sequence log is recorded and output from the printer 6.

In this embodiment, when a re-recording command is input, the time of the internal clock circuit 5 is calibrated to the standard time of the correction function clock M11, but this time is calibrated by a special operation. You can also do that.

By the way, in each of the embodiments described above, the standard clock device has a function of receiving FM broadcasting from the Japan Broadcasting Corporation, detecting a time signal broadcast at least once a day, and correcting the internal time in accordance with the time signal. Although a timepiece device with a correction function is used, other standard timepiece devices may also be used.

[Effects of the Invention] As explained above, according to the present invention, there is provided a standard clock device for generating standard time, a storage means for storing trip sequence information, a command means for instructing re-recording of trip sequence information, Events of trip sequence information stored in the trip sequence information storage means based on the deviation between the standard time information generated from the standard clock device and the time information of the internal clock circuit when re-recording is commanded by the command means Since it is equipped with a re-editing means that corrects the change occurrence time and records and outputs the corrected trip sequence information obtained accordingly, when re-recording is specified, the corrected trip sequence log with the event change occurrence time corrected to the standard time is displayed. As a result, the effects of estimating the cause of an accident and performing analysis and investigation work can be obtained appropriately.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a trip sequence recording device according to an embodiment of the present invention, FIG. 2 is a schematic diagram showing an example of an input type table, and FIG. 3 is a schematic diagram showing an example of trip sequence log information. FIG. 4 is a schematic diagram showing an example of a trip sequence log, FIG. 5 is a flow chart showing an example of processing by the time correction means, and FIG. 6(a) is a time chart showing the progress state of change occurrence when a trip occurs. figure(
b) is a schematic diagram showing an example of trip sequence log information formed at that time, and (d) is a schematic diagram showing an example of a trip sequence log recorded and output at that time,
FIG. 7(d) is a schematic diagram showing an example of a modified trip sequence log recorded and output when a re-recording command is input, FIG. 7 is a block diagram showing a trip sequence recording device according to another embodiment of the present invention, and FIG. The figure is a block diagram showing a conventional example of a trip sequence recording device. DESCRIPTION OF SYMBOLS 11... Clock device with correction function, 12... Time correction means, 13... Input device, 14... Auxiliary storage device, 1
5...Trip sequence log re-editing means. Figure 2 Figure 4 Figure 5 Figure 8 Procedural Amendment Form Date of July 18, 1986

Claims (1)

[Claims] A trip sequence recording device that chronologically records and outputs event changes in a plant when a trip occurs in a plant, with the time of occurrence added, stores a standard clock device that generates a standard time and trip sequence information. a storage means, a command means for instructing the re-recording of the trip sequence information, and a means for obtaining the standard time information and the generation time of the trip sequence information generated from the standard clock device when the re-recording is commanded by the command means. re-editing means for correcting the event change occurrence time of the trip sequence information stored in the trip sequence information storage means based on the deviation of the time information of the internal clock circuit of the circuit, and recording and outputting the corrected trip sequence information obtained thereby; A trip sequence recording device comprising: