Siemens SIMATIC ET 200PA SMART Operating Instructions Manual page 116

Interrupt, error and system messages
8.3 S7 diagnostics
Backing up the diagnostics
Depending on byte x+1, transfer the content of the device-related diagnostics for the following
reasons to a data block
● The interrupts are updated cyclically.
● The content of the diagnostics starting from byte x+3 depends on whether a diagnostic
interrupt, hardware interrupt, or plug/pull interrupt is signaled.
Note
In order to evaluate diagnostic interrupts and hardware interrupts via the device-related
diagnostics, you must regularly query the corresponding bits in the device-related
diagnostics in your user program.
See also
Identifier-related diagnosis (Page 96)
Interrupts (Page 105)
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Operating Instructions, 06/2019, A5E34192013-AB
ET 200PA SMART