What does 'Required "Programming" connection mode is not available' indicate with Unity Pro?.
When trying to connect to the CPU along with the above message it states: Do you wish to use "Monitoring" connection mode instead? (PLC is already reserved by entity : xxxxx.)
Product line
Unity Pro, Control Expert
Resolution
This means that either a second programming window is open on this PC and it is already connected to the PLC or someone else is already connected to the PLC remotely.
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Publié pour: Schneider Electric Belgium


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