Siemens s7-200 SMART interrupt command

Create Date: 2024-8-30 12:03:23|Source: Siemens/Siemens

The S7-200 SMART series of programmable controllers has up to 38 interrupt sources (9 reserved) divided into three categories: communication interrupts, input/output (I/O) interrupts, and time-based interrupts. Different outage events in each type of outage have different priorities.
Siemens s7-200 SMART interrupt command

Interrupt instructions include the following:

ATCH: Interrupt connection, connect the program segment to be called in an interrupt event.

ENI: Allows interrupts globally and enables interrupt handling.

DISI: Globally prohibits interrupts, which prohibits the processing of interrupted service programs, but interrupt events are still queued.

DTCH: interrupt separation, which cuts off the association between the interrupt event number and the interrupt service program, and prohibits the interrupt event.

RETI: Conditional interrupt returns, which are returned from the interrupt service program based on the conditions of logical operations.

CLR_EVNT: Empty the interrupt queue.
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