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Attempts to to connect to an Quantum 140CPUxx after updating to Unity 11.1 from Unity 11, could fail if it is installed in a VMware workstation PC.

Issue
Attempts to to connect to an Quantum 140CPUxx after updating to Unity 11.1 from Unity 11, could fail if it is installed in a VMware workstation PC

Product Line
Unity, Quantum Unity PLC

Environment
Unity

Resolution
Attempts to to connect to an Quantum Unity PLC after updating to Unity 11.1 from Unity 11, could fail if it is installed in a VMware workstation PC..
Prior to updating to Unity 11,1 the problem did not occur.

The following can be used as a workaround.
  • Uninstall the PLCUSB Driver X64 that was installed by Unity 11.1 until a new driver is available.


  • Insert the Unity 11.0 CD
  • Open the folder named 'Communications Drivers'.


  • Double click on the file named 'SchneiderPLCUSBDriverSuite' to install the driver.

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