?Corrected from:
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Response of the new version:
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What happens?
Variables that are linked to the process image via a component of a union data type are not updated with the process image.
When does the behaviour occur?
If the project contains a union data type, one component of which is connected to the process image and only the other component of which is used in the PLC application, then the process image is not completely updated if the setting "Always update variables = Disabled" is set for this part of the process image.
Which products are affected?
PLC Designer from V3.0
Short-term measures:
Set the setting for the respective process image to "Always update variables = Enabled 1" or "Always update variables = Enabled 2".
Evaluation / recommendations:
In the default setting of the PLC Designer, the process image of a variable is only updated if it is also used in the PLC Application. The function restriction only occurs if a component of a union data type is used in the process image. In this case, an applicative solution is described under Short-term measures.
Automatic Translation
