Which products are affected?
ESP-DDS2-x (Global Drive PLC Developer Studio V2.x)
What happens?
With the command Project>Add action, actions can be added to existing POUs (program organisation units). These actions behave like subprograms. In contrast to POUs, actions do not have their own declaration part. In actions, you can access the local variables of the POU to which actions have been added. Actions can be created in all programming languages available.
In the online mode, it is not possible to monitor the variables in the logic of the action (in the action editor), i. e. the variable values of the control are not indicated in the action editor.
When does the problem occur?
If the action has been created in the CFC (Continuous Function Chart) programming language, the variable values of the control are not indicated when opening the action editor in the online mode.
Possible diagnostics?
None.
Short-term measures/recommendations?
Change the size of the action editor window in the online mode. DDS then starts to monitor the variables visible in the action editor.
Evaluation:
Monitoring variable values is required for trouble shooting. Up to now, actions have been quite rarely used in practice. The function restriction immediately occurs when opening the action editor. After changing the size of the action editor window the monitoring function works reliably.
