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Interrupts/diagnostics alarms

5.2 Interrupts

Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)

Manual, 07/2014, A5E03484886-AC

5.2

Interrupts

Analog input module AI 8xU/I HS supports the following diagnostic and hardware interrupts.

Diagnostic interrupt

The module generates a diagnostic interrupt at the following events:

● Missing supply voltage L+

● Wire break

● Overflow

● Underflow

Hardware interrupt

The module generates a hardware interrupt at the following events:

● Low limit violated 1

● High limit violated 1

● Low limit violated 2

● Violation of high limit 2

For detailed information on the error event, refer to the hardware interrupt organization block

with the "RALRM" instruction (read additional interrupt info) and to the STEP 7 online help.

The module channel that triggered the hardware interrupt is entered in the start information

of the organization block. The diagram below shows the assignment to the bits of double

word 8 in local data.

Figure 5-2 OB start information

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 60 61

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