Siemens SIMATIC ET 200SP HA Panduan Peralatan - Halaman 44

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Siemens SIMATIC ET 200SP HA Panduan Peralatan
Drivers, parameters, diagnostics messages and address space
A.6 Address space
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.
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
A.6

Address space

Abbreviations
• "IB" stands for input byte, that is, the module start address in the input area
• "DI" stands for digital input
• "QDIn" stands for the value status (QI) of digital input n
44
Start information of the organization block
Equipment Manual, 10/2020, A5E39265608-AD
DI 16x24VDC HA