Siemens SIMATIC ET 200SP Manual page 83

Interrupts/diagnostic messages
5.3 Hardware interrupts
You can activate any combination of events to trigger hardware interrupts.
You can obtain detailed information on the event in the hardware interrupt organization block
with instruction "RALRM" (Read additional alarm information) and in the information system
of STEP 7.
Which event has triggered the hardware interrupt is entered in the start information of the
organization block. The following figure shows the assignment to the bits of the local data
double word 8.
Figure 5-2 Start information of the organization block
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TM Count 1x24V (6ES7138‑6AA01‑0BA0) technology module
Manual, 07/2019, A5E33002339-AD