OPC Item Path Stuck (Case Mismatch)

Ignition
1

I have a datatype in my PLC that uses the suffix "_Hist" to denote a historical value.

At first this PLC tag was initially created with the suffix "_HIST" instead of "_Hist". However, after changing it in the PLC the OPC server on ignition still shows the "_HIST" suffix.

How can I resolve this?

2

Have you restarted the device? And refreshed the OPC browser? Tag names in Logix processors are case-insensitive case-preserving, so it might not have registered as a change.

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3

I was able to fix it by renaming online. Renamed first to "_h" then checked the browser to see the change take affect. Then change to "_Hist". All good now.

The old-case tag must've still existed in RAM so renaming with only a case change must've grabbed that old name. I've seen that before with Logix processors when trying to create tags like that.

Thanks

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