Recommended method to identify new diagnostic error/warning?

[DCEN_Tony]

Hi,

What is the recommended method (efficient/easiest) for identifying a new diagnostic warning/error?

For example with MLC we could monitor C-0-0023 bits 25/26.

I know I can use the pending diagnostic example at How-can-I-read-pending-diagnostic-in-PLC and then monitor for a change in element 0 of one of the arrays returned, e.g .arstrMainDiagnosisNumber but this would mean I would have to continuosuly read the error list to check even if I don't necessarily need to?

Hope this is clear? 

Many thanks

[CodeShepherd · Accepted solution]

From version 1.20 on there is library CXAC_diagnostics including function block GetPendingDiagnostics for easier handling. See this thread.

In MLC you also had to cyclically monitor the corresponding parameter or how did you check it?