General

The master task operates as outlined below. A description is provided of cyclic execution of the master task in mono task operation.

Operation

The following drawing shows the execution phases of the PLC cycle.

%I Reading of inputs

%Q Writing of outputs

Description

This type of operation consists of sequencing the task cycles, one after another.

After having updated the outputs, the system performs its own specific processing then starts another task cycle, without pausing.

Cycle Check

The cycle is checked by the watchdog.