Is CurrentQuality in IEC60870 points as alarm configurable?

[Ali80]

Hello,

I would be very happy if somebody has a configuration example for the following behaviour. I need to know  if it is possible when a signal quality is changed from "good"(198) to "uncertain"(68...88) or from "good"(198) to "bad"(4...32) that then this signal raise as a alarm and this signal go into the alarm list. This I need to know for IEC60870 points.

Best regards

Alois

[AdamWoodlandToo · Accepted solution]

If you're talking one or two points to monitor (per device), you could just write some logic that executes on input processed, tick the execute on quality change, and handdress a digital output to normal/alarm as necessary to generate an alarm on an internal digital point.

This isn't scalable however.

Doing this with every point would double your point count, or you could output to a single internal point per device to flag something has a bad quality. You could use some logic and SQL to dynamically handle the points on the device, but you would need to be careful on the performance impact (depending on your system you might have to run this fairly infrequently which may impact the usefulness of the alarm?)

I'm not aware of anything special in the IEC60870 protocol that might help here.

In your situation what is the cause of the points going bad that isn't already alarms such as OS connection failure? Maybe the system can detect the issue rather than the consequence and be quicker/better performance.