How do you implement module and channel diagnostics in the user program of the SIMATIC S7-1200/S7-1500?
You implement module and channel diagnostics of IO modules that support diagnostics (like the function classes ST and HF of the ET 200SP) by calling the "RALRM" instruction in the diagnostic interrupt OB 82.
Module and channel diagnostics via the SIMATIC S7-1200/S7-1500 is illustrated taking the example of the central IO and via PROFINET IO:
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Application example "Diagnostics in the User Program with S7-1200"
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