JPH03124223A - Abnormality monitoring system - Google Patents

Abstract

PURPOSE:To detect abnormalities occurring in a plurality of loads simultaneously by providing a timer which is started upon detection of abnormality in the load and instructing interruption of power supply upon expiration of a time preset in the timer. CONSTITUTION:A processor C monitors information indicating the operating condition and detects abnormality in any load. Upon detection of abnormality in a load, it is judged whether the abnormal load is identical to the previously detected abnormal load. A timer Tm is started upon initial abnormality detection or upon detection of a new abnormality in other load after start of abnormality processing based on the initial abnormality detection. Abnormal condition of load is recorded in an abnormality recorder M constituted as an external memory, for example.

Description

[Detailed Description of the Invention] [Summary] Regarding an abnormality monitoring method that monitors abnormalities in loads in a power supply device to which multiple loads are connected, an abnormality monitoring method that can simultaneously detect abnormalities occurring in multiple loads is provided. In an abnormality monitoring device that monitors abnormalities in a plurality of loads in a power supply device to which these loads are connected,
Equipped with a timer that starts when a load abnormality is detected.
The timer is configured to issue an instruction to turn off the power when a predetermined time has elapsed.

[Industrial application field]

The present invention relates to an abnormality monitoring method for monitoring load abnormalities in a power supply device to which a plurality of loads are connected.

[Conventional technology]

FIG. 4 is a flowchart showing an example of conventional abnormality monitoring. In step 0, abnormality in the load is repeatedly monitored. When an abnormality occurs in the load, the process moves to the next step ■ and the abnormal state is checked. For example, the information is recorded in an external storage device, and in the next step (2), an instruction is given to cut off the power supply from the power supply.

[Problem to be solved by the invention]

In the conventional abnormality monitoring method described above, if an abnormality occurs in any one of multiple loads, the power is cut off, so if an abnormality occurs in two or more loads at about the same time, An abnormality can only be detected for the load that first caused the abnormality.

Therefore, even if the first detected load fault is repaired and the power is turned on again, the power will be cut off again due to other load faults that were not detected before, and all faults will have to be repaired. This sometimes takes unnecessary time and confuses operators.

SUMMARY OF THE INVENTION An object of the present invention is to obtain a power supply monitoring system that can simultaneously detect abnormalities occurring in a plurality of loads.

[Means to solve the problem]

In an abnormality monitoring device that monitors abnormalities in a power supply to which multiple loads are connected, a timer that is activated when an abnormality in a load is detected is installed, and when this timer measures a predetermined time, the power supply Now instructs to disconnect.

[For production]

FIG. 1 is a flowchart showing the principle of the present invention,
Step ■ is a step that repeatedly monitors load abnormalities. When a load abnormality is detected in this step, a timer is started in the next step ■, and the abnormal state is recorded in an external storage in the following step ■. etc. to be memorized.

The next step (■) is to change the time t that the timer reset and started in the above step (■) to a predetermined time T.
This is a step to judge whether or not a predetermined time T has elapsed by comparing the If the time T has not elapsed, the process returns to step (2) and repeats the load abnormality detection. Note that it is preferable that the predetermined time T be set to a value of about several tens of m5ec.

In this way, by not repeating abnormality detection until the predetermined time T has elapsed, even if an abnormality occurs in a load different from the load in which the abnormality was detected in the previous step ■, the abnormality can be detected. be able to be detected.

〔Example〕

FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3 is a flowchart showing the operation of this embodiment.The operation of this embodiment will be explained with reference to these figures.

n loads of #1 to #n, , L2. ,,,,,,
,,,,',L,.

are the respective power supply switches SS2 from the common power supply P.
．． , , , , , , , , S, and information indicating their operating status is sent to the control processor C from these loads.

This processor C monitors information indicating this operating state in step 0 to detect whether or not there is an abnormality in any of the loads, and when an abnormality in the load is detected, this abnormality occurs in step O. It is determined whether the load is the same as the load in which the abnormality was detected earlier. In other words, this step 0 is for determining whether an abnormality is detected on top of another load after abnormality processing has already started.

If it is detected in this step ■ that a new abnormality has been detected in another load after the first abnormality detection or abnormality processing was started by this first abnormality detection,
In the next step 0, the timer Tm is started, and in the following step 2, the abnormal state of the load is recorded in the abnormality recording device M configured as an external storage device, for example.

The next step ■ is to increase the time t measured by the timer Tm, which was reset and started in step 0 above, by several tens of m5ec.
This is a step of comparing the predetermined time T of the degree to determine whether or not a predetermined time has elapsed, and if the predetermined time T has elapsed and t≧T, the next step ■
A disconnection instruction is sent to the power switch S1. S2
, but if this time T has not elapsed, the process returns to step 0 and the loads Ll, L2, ”
””””L.

Repeat the abnormality detection.

While repeating this abnormality detection, if the abnormality detected in step 0 is in a load for which an abnormality has already been detected, the next step ■ directly goes to step [phase], so the timer Tm is reset and started. The abnormal state is not recorded in the abnormality recording device M, but if this abnormality is detected from a load other than the load in which the abnormality was detected earlier, the timer Tm is reset and started in step 0 and step The abnormal state is recorded in the abnormality recording device M at .

In this embodiment, the timer Tm is reset and started each time a new abnormality is detected, so many successive load abnormalities can be detected at the same time. The time from when the power is turned off until the power is shut off may become longer, which may cause damage to the power supply or the load where the abnormality is occurring, so reset and start the timer Tm only when the first abnormality is detected. You may also do so. In this case, the time measured by the timer Tm is preferably several hundred m5ec.

〔Effect of the invention〕

According to the present invention, it is possible to detect multiple load abnormalities that occur during a predetermined time at the same time, and the power is then turned on again after all detected abnormalities are repaired. Therefore, it is possible to achieve the special effect of eliminating the need to supply power to a load whose abnormality has not been repaired or to repeatedly turn on and cut off the power.

[Brief explanation of drawings]

Fig. 1 is a flowchart showing the principle of the present invention, Fig. 2 is a block diagram showing an embodiment of the invention, Fig. 3 is a flowchart showing the operation of the embodiment of Fig. 2, and Fig. 4 is the operation of the conventional example. It is a flowchart which shows. Flowchart showing the principle of the present invention Flowchart of conventional example FIG. 4 FIG. 1 Embodiment of power supply FIG. Flowchart of embodiment

Claims (1)

[Claims] An abnormality monitoring device that monitors abnormalities in a power supply to which multiple loads are connected is equipped with a timer that starts when an abnormality in the load is detected, and when this timer measures a predetermined time, the power supply An abnormality monitoring method characterized by instructing disconnection.