Hardware Interrupts; A.5 Hardware Interrupts - Siemens SIMATIC ET 200SP HA Manual

Drivers, parameters, diagnostics messages and address space

A.5 Hardware interrupts

A.5

Hardware interrupts

Hardware interrupts
The DI 16×24VDC HA generates a hardware interrupt for the following events:
● At a rising edge (signal change from 0 to 1)
● At a falling edge (signal change from 1 to 0)
Interrupt OBs are called automatically if an interrupt occurs.
The module channel that triggered the hardware interrupt is recorded in the start information
of the OB40 in the OB40_POINT_ADDR tag. The figure below shows the assignment to the
bits of local data double word 8.
Figure A-4
46
Start information of the organization block
Digital Input Module DI 16xNAMUR HA (6DL1131-6TH00-0PH1)
Manual, 11/2017, A5E39293880-AB