At a Glance
A task can be set to STOP in different ways:
Use of a breakpoint or the Step by Step mode.
Use of the PLC screen (PLC animation screen).
Precautions
ATTENTION: When a task is set to STOP, Inputs/Outputs behave differently to whena task is deactivated.
The behavior of outputs differs depending on the type of PLC:
Modicon M580, M340 and Premium / Atrium: when a task is set to STOP, the associated outputs automatically switch to the configured mode (fallback or maintain). The outputs associated with the other tasks continue to be updated as normal.
Quantum: when a task is set to STOP, the associated outputs continue to be updated with the value that preceded the STOP action. The outputs associated with the other tasks continue to be updated as normal.
when inputs are also updated by another task that is still in RUN
when Inputs/Outputs are mapped in the same memory zone, and associated with different tasks.
| WARNING | |
|---|---|
UNEXPECTED OUTPUT BEHAVIOR - TASK STOP WITH QUANTUM When a task is set to STOP with Quantum, ensure that no
other running task is managing the same outputs. Failure to follow these instructions can result in death, serious injury, or equipment damage. | |