JPH0728450B2 - Monitoring information transfer method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a supervisory control system that enables efficient transfer of supervisory information in a line having a limited transmission capacity.

[Conventional technology]

A conventional transfer method of monitoring information is shown in FIG. In FIG. 2, individual alarms output from each device of the monitored station are FAs (Function Alarms), and FAs corresponding to the respective monitoring items are FA _1,1 , FA _1,2 ... FA _{n, m} ... Expressed as FA _{x, y} .

The status of these FAs ("alarm ON" or "alarm OF"
F ”) is sequentially transferred to the monitoring station at a constant cycle T ₁ .

[Problems to be solved by the invention]

In the conventional transfer method, the number of monitored items FA has increased and
If the transmission capacity of the line that transfers the data is limited, the time T ₁ required to transfer all the monitoring items FA becomes longer,
Change the status of the monitoring item FA (from "Alarm ON" to "Alarm
Changes to the OFF "or the" Alarm OFF "after the change) occurs to the" alarm ON ", the delay in the worst by T ₁ hour important monitoring information occur until the change information to the monitoring station are transferred to quickly transfer There was a drawback that it could not be done.

According to the present invention, in a supervisory control system having a large number of supervisory items, important supervisory information is transferred to a supervisory station without delay in a line having a limited transmission capacity, and redundant supervisory information is prevented from being transferred. The objective is to perform system management (monitoring).

[Means for solving problems]

In the present invention, the respective monitoring items FA are grouped, for example, on a device-by-device basis into a higher alarm BA, and this upper alarm is sent first, and then FA is transmitted, so that alarms of high importance can be sent quickly. Characterize.

〔Example〕

An embodiment of a method of transferring monitoring information according to the present invention is shown in FIG. 1 and a method of solving the problems of the conventional method will be described.

In the present invention, the lowest monitoring item FA output from each device of the monitored station is divided into device units or functional block units constituting the device, and the monitoring items are summarized by BA (Block Alar).
m) and represented by BA _{1 to} BA _n , respectively.

Therefore, since these BAs are composed of the logical sum of multiple FAs, the number of monitoring items is BA <FA. Monitoring items FA _{n, 1 to} FA _{n , m}
When a status change occurs, one basic frame is composed of 1BA signal and 1FA signal as shown in FIG. 3 so that the monitoring station can quickly judge the status of each device or block unit. It is assumed that one monitoring information transfer frame is composed of one all information basic frame and n (n = 3 in FIG. 3) state change basic frames. This frame is transmitted at a specific cycle.

When a state change occurs in the monitoring item, the state information after the change of the monitoring item is transferred in this state change basic frame. That is, if FA _1,1 turns from alarm off to on, it sends BA ₁ and FA _1,1 alarm on information in this frame. Further, the all information basic frame is a correction frame when the transfer information by the state change basic frame causes an error in the transmission line etc. and the monitoring information is not normally transferred to the monitoring station, and BA is the monitoring item BA ₁ to BA _n status ("Alarm O
N "or" alarm off ") in sequence, and FA transfers only the monitoring items FA _{n, 1 to} FA _{n, m} that are" alarm on ".

With such a frame structure, the BA is given a higher priority than the FA, and the number of monitoring items is BA <FA as described above. Therefore, by transferring the BA and FA independently, FA _{n, When one of 1 to} FA _{n, m} changes from "Alarm OFF" to "Alarm ON", BA _n "Alarm ON" corresponding to the changed monitoring item is transferred without delay by BA signal and alarm ON The monitored items that have become are transferred to the monitoring station in the order in which they occurred.

When there is an alarm that accompanies the occurrence of an alarm of a certain device or line, only the alarm that is the main cause is transferred, and the alarm that accompanies is not transferred from the monitored station to the monitoring station.

If the monitored items FA _{n, 1 to} FA _{n, m} change from “Alarm ON” to “Alarm OFF” almost at the same time, FA _{n, 1 to} FA _n, m
BA _n, which is the logical sum of _{n and m}
Since it changes from “N” to “Alarm OFF”, the monitoring station uses BA
FA that make up the BA _n by receiving the "alarm OFF" of the _{n
n, 1} ～FA _n, the state change information of _m are all "alarm OFF" state FA _{n, 1} ~FA since it can be determined that _n, from the "alarm ON" of _m to "Alarm OFF", the monitored No need to transfer from station to monitoring station. That is, when the alarm is turned off, only the BA signal is transmitted as the state change basic frame.

As described above, according to the transfer method of the present invention, it is possible to quickly transfer the monitoring information from the monitored station to the monitoring station and reduce the transfer information.

〔The invention's effect〕

As described above, according to the monitoring information transfer method of the present invention, in a monitoring system configured with a line having a limited transmission capacity, a monitoring item having a high degree of importance is preferentially transferred from a large number of monitoring items. In addition, by preventing redundant transfer of monitoring information, it becomes possible to quickly transfer monitoring items that are important for system maintenance and operation.

 Fault search in the monitoring station becomes easy.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of transfer of conventional monitoring information, FIG. 2 is a block diagram showing an example of transfer according to the present invention, and FIG.
It is a block diagram of the monitoring information transfer frame in the figure.

Claims (1)

[Claims] 1. A monitoring system that transfers monitoring information from a monitoring device of a monitored station that monitors the status of lines and devices to a monitoring station that manages these conditions. Are divided into groups according to their importance, and a transfer frame structure that enables the entire monitoring items to be transferred in a single frame transfer cycle. (B) A causal relationship between alarm generation and recovery processes. The monitoring items in (1) are organized into a tree structure, and the alarm (upper alarm) that always occurs when a certain alarm (lower alarm) occurs is not transferred to the monitoring station. When recovering at the same time, only the recovery information of the higher level alarm is transferred. (C) Regardless of whether or not an alarm is generated, the device status is monitored in the above frame at regular intervals. Monitoring information transfer method, characterized by transferring to the station.