If the controller (usually 1756-L7x ControlLogix and over ) has a USB port that uses a Type B receptacle. The port is USB2.0 compatible and runs at 12 Mbps. to use the USB port of the controller, you must have RSLinx® software, version 2.56 or later, installed on your workstation. Use a USB cable to connect your workstation to the USB port. With this connection, you can upgrade firmware and download programs to the controller directly from your workstation.

Configure the USB Driver

To configure RSLinx software to use a USB port, you must first configure a USB driver.
To configure a USB driver, perform this procedure.
1. Connect your controller and workstation by using a USB cable. The Found New Hardware Wizard dialog box appears.

2.Click any of the Windows Update connection options and click Next.

3.Click Install the software automatically (Recommended) and click Next. The software is installed.

4. Click Finish to configure your USB driver.
5. From the Communications pull-down menu, choose RSWho.

The USB port driver appears

Your controller appears under two drivers, a virtual chassis and the USB port. You can use either driver to browse to your controller.