Specifications

Interrupts/diagnostics alarms
5.2 Interrupts
DI 32x24VDC HF digital input module (6ES7521-1BL00-0AB0)
38 Manual, 04/2015, A5E03485935-AE
5.2
Interrupts
Digital input module DI 32x24VDC HF supports diagnostic and hardware interrupts.
Diagnostic interrupt
The module generates a diagnostic interrupt at the following events:
● Missing supply voltage L+
● Wire break
● Parameter assignment error
Hardware interrupt
The module generates a hardware interrupt at the following events:
● Rising edge
● Falling edge
● Rising and falling edge
● Comparison event occurred for DQ (only in "Counting mode")
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 figure below shows the assignment to the bits of the local data
double word 8.
Figure 5-2 Start information of the organization block