USB Port and Driver (ERROR: Variable (USBprogramming) is undefined.)

The USB port supports only OS and project download.

Before you can use the port, you must install your PC with a USB driver and set a PC COM port. This driver may be installed using VisiLogic as follows:

  1. Open Connection > Communication - PC Settings and click the USB tab

  2. Click Install USB Driver and follow the on-screen instructions to install the driver that is provided.

Note ♦

If requested to use Windows Update--do not accept this option; click "Skip obtaining driver software from Windows Update".

Install only the driver provided by VisiLogic.

 ♦

The USB cable must not be connected during the installation.


  1. After the driver installation is complete, click Open Device Manager, and select the COM port.
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