Which products are affected?
ESP-DDS2-P (Global Drive PLC Developer Studio Version 2.0, 2.1)
What happens?
If in the Task configuration (Resources tab) the priority 0 is set for testing purposes, the task is blocked. This means the task is not called up by the PLC so the programs attached to the task are not executed. Priority 0 can be issued for several tasks.
If several tasks have priority 0, in the Task monitor (Resources tab) the status of Blocked and the ST symbol is displayed only for the first (uppermost) task. All other tasks with priority 0 have the status of Inhibited and the ST symbol is not displayed.
When does the problem occur?
If several tasks have priority 0, the Task monitor can identify the status of Blocked for one task whilst for the other tasks the Task monitor indicates the status of Inhibited.
Possible diagnostics?
None.
Short-term measures/recommendations?
None.
Evaluation:
Priority 0 is set for tasks only for testing purposes and troubleshooting. Consequently, the task is no longer called up by the PLC, which the Task Monitor indicates by the status of Blocked or Inhibited.
