JPH0421039A - Remote monitoring information restoring system - Google Patents

Abstract

PURPOSE:To correctly restore the remote monitoring information independent of the remote monitoring information before and after generation of a fault of a communication circuit by providing a circuit monitoring part, a saving memory and a control logical part in an information processor. CONSTITUTION:An information processor 10 collects remote monitoring information sent from a remote monitor 30 through a communication circuit 20, and when the remote monitoring information is missing, the missing remote monitoring information is restored. A circuit monitoring part 11 monitors whether the communication 20 is faulty or not, and a saving memory 12 saves the remote monitoring information in accordance with a monitoring item. Also, a control logical part 13 actuates a timer at the time of processing of a data frame for informing all of the remote monitoring information for showing an alarm state, and the remote monitoring information for showing an alarm state, informed before becoming time-out after a set time elapses is stored in the saving memory 12 by a different code from a code for showing an alarm state stored in the saving memory 12 previously. In such a way, independent of the remote monitoring information before and after generation of a fault of the communication circuit 20, the remote monitoring information can be restored correctly.

Description

[Detailed Description of the Invention] [Summary] Regarding a remote monitoring information restoration method for restoring remote monitoring information that was lost due to a communication line failure with a remote monitoring device when the communication line is restored, the present invention relates to a remote monitoring information restoration method that restores remote monitoring information that was lost due to a failure in the communication line with a remote monitoring device. In order to correctly restore remote monitoring information in any case, the system collects remote monitoring information sent from remote monitoring devices via information processing equipment or communication lines, and if the remote monitoring information is missing, In the method for restoring missing remote monitoring information, the information processing device includes a line monitoring unit that monitors whether the communication line is out of order or has been restored, a storage memory that stores the remote monitoring information corresponding to monitoring items, and a A timer is started when processing a data frame that notifies all of the remote monitoring information indicating the alarm condition from the monitoring device, and the remote monitoring information indicating the alarm condition that was notified before the timeout after the set time has elapsed will be and a control logic unit that stores in the storage memory a code different from the code indicating the alarm state stored in the storage memory.

[Industrial application field]

The present invention relates to a remote monitoring information restoration method, and more particularly to a remote monitoring information restoration method for restoring remote monitoring information lost due to a communication line failure with a remote monitoring device when the communication line is restored.

In recent years, remote monitoring and control systems mainly using computers have been applied in many fields, and there is an increasing demand for faster and more efficient information processing. Therefore, in order to improve communication efficiency between the remote monitoring device and the information processing device that make up the above-mentioned remote monitoring and control system, out of multiple pieces of remote monitoring information, only those whose status has changed are transmitted. It is common practice to transmit the information.

In this case, when starting up the device or restoring the communication line between the remote monitoring device and the information processing device, does the information processing device need to collect information indicating whether all monitored items are in an alarm state or a normal state? However, in order to improve the efficiency of communication of remote monitoring information at this time, the remote monitoring device notifies the information processing device only of information about monitoring items that are in an alarm state, and which monitoring items are in a normal state. (Normally, the number of monitored items in alarm status is small).

However, in this case, when the device is started, all monitored items are assumed to be in a normal state and then the status is updated only for the monitored items that have been notified that they are in an alarm state. Is it possible to know this? When the communication line is restored, if a monitored item that was in an alarm state before the communication line failure is restored during the failure, there will be no notification that it was in the alarm state, so the information processing equipment On the side, it is necessary to restore the remote monitoring information without contradiction.

[Conventional technology]

FIG. 5 shows a configuration diagram of an example of a main part of a conventional remote monitoring information restoration method. In the figure, 100 is an information processing device connected to a remote monitoring device (not shown) via a communication line;
It is also connected to a host device (not shown) via a communication line, has a built-in monitoring status storage buffer 101, and also causes a printer 102 to print remote monitoring information in the form of continuous reports.

Conventionally, the information device 100 uses a built-in central processing unit (not shown) to restore remote monitoring information by performing processing operations according to the flowchart shown in FIG. 6 when the device is started up or when a communication line is restored. That is, the information processing device 100 first sets all storage areas to normal (rNORM) for each of the m monitoring items in the monitoring state storage buffer 101.
Step 111: Initialize to a value indicating the state (also written as J).
), and then prints the monitoring item that has changed from the alarm (hereinafter also referred to as rALMJ) state to the NORMOR state to the printer 102 or notifies the host device, as necessary (step 112).

Next, an ALM item notification message 103 that notifies all monitoring items in the ALM state sent from the remote monitoring device is received, and a storage area of the monitoring status storage buffer 101 corresponding to the number of the ALM item in the received message is received. is updated to a value indicating the ALM state (step 113). After that, N
The monitored items that have changed from the ORMOR state to the ALM state are printed on the printer 102 or notified to a higher-level device, as necessary (step 114).

[Problem to be solved by the invention]

Therefore, according to this conventional method, as shown in FIG. 7, if the state before the communication line failure is different from the state at the time of recovery of the communication line, printing to the printer 102 can be performed normally, and When both are NORMOR at the time of recovery, there is no printing to the printer 102, so is there a problem?
If a monitoring item that was in the ALM state before the communication line failure continues to be in the ALM state when the communication line is restored, the initialization in step 111 causes the NORM state to be printed, and then the ALM state to be printed. was there.

The present invention has been made in view of the above points, and aims to provide a remote monitoring information restoration method that can correctly restore remote monitoring information even in cases such as remote monitoring information before and after the occurrence of a communication line failure. 2.

[Means to solve the problem]

FIG. 1 shows a diagram of the basic structure of the invention. The present invention collects remote monitoring information sent from the remote monitoring device 30 via the information device 10 or the communication line 20, and restores the missing remote monitoring information when the remote monitoring information is missing. and storage memory 12 and control logic section 13 or 1
3- is provided within the information processing device 10.

The line monitoring unit 11 monitors whether the communication line unit 2o is out of order,
The storage memory l2 stores remote monitoring information corresponding to monitoring items. In addition, the control logic unit 13 starts a timer when processing a data frame that notifies all of the remote monitoring information indicating the alarm state, and the remote monitoring information indicating the alarm state that has been notified before timeout after the elapse of the set time. is stored in the storage memory 12 as a code different from the code indicating the alarm state previously stored in the storage memory 12.

In addition, the control logic unit 13- rewrites all codes indicating alarm conditions stored in the storage memory 101 into special codes, starts a timer, and provides remote monitoring information indicating alarm conditions that have been notified before timeout. is stored in the storage memo January 2 as a code indicating the normally used alarm state.

[Effect]

When the device is started or when a communication line failure is restored, the remote monitoring device 30 transmits to the information processing device 10 a data frame that notifies all remote monitoring information indicating an alarm state in response to a request from the information processing device IO.

The control logic unit 13 in the information processing device 10 performs operations according to the flowchart shown in FIG. 2 when processing this data frame.

That is, the control logic unit 13 starts the information collection timer (step 41), and monitors the status of the monitoring item (hereinafter referred to as rALM item) indicating the alarm status in the data frame received during the timer operation period. The code ALM2 is different from the code indicating the previous alarm condition.
It is recorded in the storage memory 12 as (step 42).

Also, during this timer operation period, the remote monitoring device 30 notifies you each time there is a status change or a status change occurs from the remote monitoring device 30 in the same way as in normal processing. The items are stored in the storage memory 12 using the above code ALM2, and NORMOR indicating the NORM status is stored in the storage memory 12 using the above code ALM2.
A code indicating the M state is stored in the storage memory 12 (step 42).

Therefore, in the present invention, since the code of the ALM item stored in the storage memory 12 before the failure of the communication line 20 is distinguished from the code ALM2 of the ALM item stored after the line is restored, an alarm occurs within the timer time. You can determine whether you have been notified. Therefore, it is possible to identify monitoring items that were in the ALM state before the line failure and that continue to be in the ALM state even after the line failure is restored, and all other conditions can also be correctly identified.

Next, in the present invention, the ALM notification from the remote monitoring device 30
When the set time that is sufficient to capture all item notifications has passed after the timer was activated, the timeout will occur. After that, the contents of the storage memory 12 will be checked, and if the status is NORMO, it will be stored as it is as a code indicating the NORM or ALM status before the line failure. If the value is NORM, it is changed to NORM and stored (step 43). In other words, in the present invention, the AL
ALM items for which there is no M notification are considered to have been restored normally.

Also, after a timeout, the contents of the storage memory 12 are
The monitoring items stored with the code M2 are updated and recorded with a code indicating the normal alarm state (step 44).

This makes it possible to prepare for processing a data frame that notifies all of the remote monitoring information indicating the next alarm condition.

In addition, in place of the control logic unit 13, all codes indicating the ALM status stored in the storage memory 12 at the time of timer activation are rewritten to special codes, and ALM items that are notified even during the timer operation period are used during normal times. A to be done
It is also possible to use a control logic section 13'' that is rewritten with a code indicating the LM state.

〔Example〕

FIG. 3 is a block diagram of an embodiment of the present invention, in which the same components as in FIG. 1 are given the same reference numerals. FIG. 3(A) shows an example during normal operation, FIG. 3(B) shows an example when a line failure is restored, and FIG. 3(C) shows an example when a timeout occurs. Further, FIG. 4 shows a flowchart for explaining the processing operation of one embodiment of the control logic unit 13. An embodiment of the present invention will be described below with reference to FIGS. 3 and 4.

(A) During normal operation, the control logic unit 13 determines whether or not the line failure has been recovered based on the output from the line monitoring unit 11 (step 51 in FIG. 4);
When it is determined that the normal operation is not due to recovery from a line failure, it is determined whether a status change notification has been received from the remote monitoring device 30 (step 52). The status change notification is sent to the information processing device 1.
Regardless of the request from 11, the remote monitoring information of multiple monitoring items to be sent from the remote monitoring device 30 is sent each time there is a change from the ALM state to the NORM state or from the 11NORM state to the ALM state. This is the information that will come.

When the control logic unit 13 receives this status change information, it stores the code in the monitoring status storage buffer 15 (corresponding to the storage memory 12) shown in FIG. 3(A) according to Table 1.

Table ■ (*: No processing) As shown in Table 1, when the contents of the monitoring status storage buffer 15 before the status change notification (buffer status (old)) is different from the status for which the status change was notified (notification status). Only at the time of ALM, the code of the corresponding monitoring item stored in the monitoring status storage buffer 15 is updated: 1. NORM time: 0
), and prints out the notification status to the printer 16 as shown in FIG. 3(A).

(B) When the line failure is restored In FIG.
In A), the line monitoring unit 11 detects line failure recovery, as shown by ■ in FIG. At this time, the storage contents of the monitoring state storage buffer 15 are maintained at the contents immediately before the communication line failure.

When the control logic unit 13 receives the restoration notification from the line monitoring unit 11 in step 51 of FIG. 4, it starts an internal information timer (step 54; (■) in FIG. 3(B)).
, sends an ALM item request to the remote monitoring device 3o (step 55; (■) in FIG. 3(B)). After that, the control logic unit 13 sets the state to 1 failure recovery state 1 (step 56).
, it is checked whether the information collection timer has timed out (step 57), and if it has not timed out, it is determined whether there has been any notification of an ALM item or a status change (step 58). A performed in step 55 above
In response to the LM item request, the remote monitoring device 30 returns only all the ALM items at the time of the request to the information processing device 10, as shown by ■ in FIG. 3(B). In addition, the remote monitoring device 3
Separately, after the line failure is restored, o sends a status change notification to the information processing device 1o in the same way as during normal operation, as shown in Figure 3 (B).
Proceed as shown in '.

When the control logic unit 13 receives the above-mentioned ALM item notification or status change notification, it proceeds to step 59 in FIG.
Process according to the following.

Table ■ (*: No processing) In other words, the code indicating the ALM status during normal operation is “I
”, or during the timer operation period at the time of line failure recovery, the ALM item is written to the monitoring status storage buffer 15 with a code “-1” different from the above code. After being written, if monitoring information indicating ALM status or NORM status is notified for the same monitoring item, that information is sent only when there is a status change (i.e., NORM status notification) as shown in the bottom column of Table ■. The code is updated to indicate the status.Thus, in this embodiment, it is possible to distinguish between the ALM item notified during the timer operation period at the time of a line failure and the ALM item before the line failure from the code.

In this way, the status is updated (■ in Figure 3 (B)), and the code changes from “0” to “1” and “1” to “0”.
Printing is performed by the printer 16 only when the value changes from -1" to "0" (■ in FIG. 3B).

(C) At time-out, after the set time has elapsed after starting the above timer, the screen shown in Fig. 3 (C) appears.
As shown in , a timeout occurs, and this causes the control logic section 13 to
When detected in step 57 of FIG. 4, all items in the monitoring status storage buffer 15 are processed according to the table ① shown below (step 60), and after returning the status to normal status 1, the process proceeds to step 51. return.

Table ■ (*2-no processing) In other words, as shown in FIG. For monitoring items changed from "l" to "0", change the item number and remote monitoring information. This is a process in which the printer 16 prints the following.

In this way, if the ALM information is not notified within the timer time that should have been notified after the line failure is restored, it is assumed that the old buffer status has changed to NORMOR even if it is "1", and the ALM status is changed to NORMOR. The change to NORMOR is printed out.

According to this embodiment, which performs the above-described operations, monitoring items that are in the ALM state from before a line failure occurs to after the line is restored are not printed on the NORMOR, and unnatural information restoration can be eliminated.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and after rewriting all the monitoring items stored in the monitoring status storage buffer as ALM status into special codes at the time of recovery from a line failure, notification is made during timer operation. The ALM items may be stored as codes indicating ALM states used during normal operation. In this case, when the timeout occurs, the N
Rewriting processing to the code indicated to ORMOR is performed.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to identify monitoring items that were in the ALM state before the line failure and continue in the ALM state even after the line failure is restored, so that the notification content that was conventionally unnatural can be changed naturally. It also has the advantage of being able to correctly restore remote monitoring information for all other conditions.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the principle configuration of the present invention, Fig. 2 is a flow chart for explaining the operation of the present invention, Fig. 3 is a block diagram of an embodiment of the present invention, and Fig. 4 is an explanation of the operation of an embodiment of the present invention. FIG. 5 is a configuration diagram of an example of the main part of the conventional method, FIG. 6 is a flowchart for explaining the operation of the conventional method, and FIG. 7 is a diagram for explaining problems in the conventional method. In the figure, 0 indicates the information processing device, l indicates the line monitoring unit, 2 indicates the storage memory, 3.11 indicates the control logic unit, 0 indicates the communication line, and 0 indicates the remote monitoring device.

Claims (5)

[Claims] (1) The information processing device (10) collects remote monitoring information sent from the remote monitoring device (30) via the communication line (20), and when the remote monitoring information is missing, restores the missing remote monitoring information. In the method, the information processing device (10)
includes: a line monitoring unit (11) that monitors whether the communication line (20) is out of order or restored; a storage memory (12) that stores the remote monitoring information corresponding to monitoring items; and the remote monitoring device (30). A timer is started when processing a data frame that notifies all of the remote monitoring information indicating the alarm condition of Remote monitoring information comprising: a control logic unit (13) that stores in the storage memory (12) a code different from the code indicating the alarm state stored in the storage memory (12). Restoration method. (2) The control logic unit (13) includes the storage memory (
12) The code indicating the alarm status is stored,
2. The remote monitoring system according to claim 1, further comprising updating a code indicating a normal state to a monitoring item for which remote monitoring information indicating an alarm state has not been notified within a time period after the timer is activated until a timeout occurs. Information recovery method. (3) After the timeout, the control logic unit (13) rewrites all the remote monitoring information of the monitoring items stored in the different code on the storage memory (12) to the code indicating the alarm state. 2. The remote monitoring information restoration method according to claim 1. (4) The information processing device (10) collects remote monitoring information sent from the remote monitoring device (30) via the communication line (20), and when the remote monitoring information is missing, restores the missing remote monitoring information. In the method, the information processing device (10)
includes: a line monitoring unit (11) that monitors whether the communication line (20) is out of order or restored; a storage memory (12) that stores the remote monitoring information corresponding to monitoring items; and the remote monitoring device (30). When processing a data frame that notifies all of the remote monitoring information indicating an alarm condition, all the codes indicating the alarm condition stored in the storage memory (12) are rewritten to special codes, a timer is started, and the set time is Remote monitoring information indicating alarm conditions that were notified before the timeout expires is
A method for restoring remote monitoring information, comprising: a control logic unit (13') that stores a code indicating a normally used alarm state in the storage memory (12) in place of the special code. (5) After the timeout, the control logic unit (13') updates all the remote monitoring information of the monitoring items stored in the special code on the storage memory (12) to a code indicating a normal state. 5. The remote monitoring information restoration method according to claim 4.