Triggering Of A Diagnostics Interrupt; Triggering A Hardware Interrupt - Siemens SIMATIC ET 200SP Manual

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5.2.1

Triggering of a diagnostics interrupt

For an incoming or outgoing event (e.g. wire break on a channel of an I/O module), the

module triggers a diagnostics interrupt if this is configured accordingly.

The CPU interrupts the processing of the user program and processes the diagnostics

interrupt OB (OB 82). The event that triggered the interrupt is entered in the start

information of the diagnostics interrupt OB.

5.2.2

In the event of a hardware interrupt, the CPU interrupts processing of the user program and

processes the process interrupt OB, e.g. OB 40. The event that triggered the interrupt is

entered in the start information of the hardware interrupt OB.

Note

Diagnostics "Hardware interrupt lost" (from I/O module)

Do not use hardware interrupts for functional purposes (e.g. cyclic generation of hardware

interrupts).

If the hardware interrupt load is too high, hardware interrupts can get lost depending on the

number of I/O modules and the communication load.

Interface Module IM 155-6 PN R1 (6ES7155-6AU00-0HM0)

Equipment Manual, 11/2022, A5E51160307-AA

Interrupts, error messages, diagnostics and system alarms

5.2 Interrupts

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