Siemens Simatic S7-1500 Manuel - Page 36

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Interrupts/diagnostics alarms

5.2 Interrupts

5.2

Interrupts

Digital input module DI 32x24VDC HF supports diagnostic and hardware interrupts.

You can find detailed information on the error event in the error organization block with the

"RALRM" instruction (read additional interrupt info) and in the STEP 7 online help.

Diagnostics 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")

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

DI 32x24VDC HF digital input module (6ES7521-1BL00-0AB0)

Manual, 09/2016, A5E03485935-AF