Siemens SIMATIC ET 200SP Manual - Halaman 40

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Drivers, parameters, diagnostics messages and address space

A.5

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.

You can find detailed information on the event in the hardware interrupt organization block

with the "RALRM" instruction (read additional interrupt information).

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

Start information of the organization block

Digital Input Module DI 16x24VDC HA (6DL1131-6BH00-0PH1)

Manual, 05/2017, A5E39265608-AA