Slow systems troubleshooting

Ignition
1

Friends,

I’m sorry for this “open” question but i need some troubleshooting tips for slow response system. This is a frecuently fact, but this time is about ignition 8, kepserver 6 and 3 plc CLX 73 with 1756-EN2T ethernet gateway.

For now, I know that we have almost 21000 tags (that’s what KS says) divided in 3 PLC. Here you can see the diagnostic page:

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We expect that TAGS with 500ms must respond to changes in that order of time.

Any help and hints are welcome. Greetings,

2

If these tags are all from Kepserver you should be looking there for troubleshooting.

Their manual has a section on performance optimizations, have you looked at that yet?

3

Thanks Kevin. There are some hints that we can follow. But in Ignition, do you know something about the interpretation of the info that I attached?

For example, for “direct_1000” scanclass, We have 5700 tags so the average duration should be 1000/5700 [ms] or there are concurrent threads inside the scanclass or another kind of optimization.

Thanks again for the KS manual.

4

“Scan class” is a misnomer when it comes to OPC tags. All we do is pass the scan class rate along when creating a subscription and monitored items on the OPC server. There is no polling or scanning happening between OPC client and OPC server.