Interrupts - Siemens SIMATIC S7-1500 Manual

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
Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)
Manual, 07/2014, A5E03484886-AC
OB start information
Interrupts/diagnostics alarms
5.2 Interrupts
29