Posted 10 Mar 2018 when i try to upload a code to m340 it give me this message "This isn't a valid PLC Address, or PLC is busy , or media is off." whatever i use usb or tcp/ip port, it don't always give me the message but most of the time it does and i have to unplug and replug the cable many time until it upload the code, i am sure it's not a cable problem what can it be? Share this post Link to post Share on other sites
Posted 12 Mar 2018 Well with usb you have to wait for the driver to load after plugging in cable. It takes a few seconds. You should see a icon popup on the bottom right of windows when usb driver is ready Share this post Link to post Share on other sites
Posted 15 Mar 2018 cHud provides right answer. First, after you plug the PLC, you can check if device was recognized by Windows and starts the USB driver, only than UnityPro will get the connection to PLC. Share this post Link to post Share on other sites