Interrupts - Siemens S7-1500 Manual

5.2

Interrupts

Digital input module DI 16x24...125VUC HF supports diagnostic and hardware interrupts.
You can find detailed information on the error event in the error organization block with the
"RALRM" instruction (read additional interrupt info) and in the STEP 7 online help.
Diagnostics interrupt
The module generates a diagnostic interrupt at the following events:
● Wire break
● Parameter assignment error
● Hardware interrupt lost
Hardware interrupt
The module generates a hardware interrupt at the following events:
● Rising edge
● Falling edge
● Rising and falling edge
The module channel that triggered the hardware interrupt is entered in the start information
of the organization block. The following figure shows the assignment to the bits of double
word 8 in local data.
Figure 5-2
Digital input module DI 16x24...125VUC HF (6ES7521-7EH00-0AB0)
Manual, 12/2016, A5E35681478-AC
Start information of the organization block
Interrupts/diagnostic alarms
5.2 Interrupts
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