Siemens SIMATIC Equipment Manual

Interrupts/diagnostics alarms
5.3 Alarms
I/O device digital inputs DI 16x24VDC M12-L 8xM12 (6ES7141-6BH00-0BB0)
Equipment Manual, 06/2021, A5E46570510-AB
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5.3.3 Hardware interrupts
During a hardware interrupt, the CPU interrupts processing of the user program and
processes the hardware interrupt organization block.
For detailed information on the event, refer to the hardware interrupt organization block with
the "RALRM" instruction (read additional interrupt info) and to the STEP 7 online help.
The information on which channel of the I/O device 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

Siemens SIMATIC Specifications

General

Product type designation	SIMATIC
CPU	Varies by model
Memory	Varies by model
Input/Output	Varies by model
Communication	Varies by model
Programming Language	STEP 7
Operating Temperature	0°C to 60°C (varies by model)
Protection Class	IP20
Category	Programmable Logic Controller (PLC)