P4019¶

Code: P4019
Message: Task name is duplicated within a resource

This error occurs when a resource declaration contains two or more tasks with the same name. Each task within a resource must have a unique name.

Example¶

The following code will generate error P4019:

CONFIGURATION config
    RESOURCE resource1 ON PLC
        TASK my_task(INTERVAL := T#100ms, PRIORITY := 1);
        TASK my_task(INTERVAL := T#200ms, PRIORITY := 2);  (* Error: Duplicate task name *)
        PROGRAM instance1 WITH my_task : my_prg;
    END_RESOURCE
END_CONFIGURATION

The code defines two tasks with the same name my_task within the same resource, which is not allowed.

To fix this error, give each task a unique name:

CONFIGURATION config
    RESOURCE resource1 ON PLC
        TASK fast_task(INTERVAL := T#100ms, PRIORITY := 1);
        TASK slow_task(INTERVAL := T#200ms, PRIORITY := 2);
        PROGRAM instance1 WITH fast_task : my_prg;
    END_RESOURCE
END_CONFIGURATION