This suggests a problem with the USB connection. Go to Device Manager, expand "Universal Serial Bus controllers," right-click the (there might be multiple), and select Properties > Power Management . Ensure "Allow the computer to turn off this device to save power" is unchecked for the ports you are using. Repeat this for all USB Root Hubs.
While generic USB-to-Serial drivers (like Prolific or FTDI) exist, the Amsamotion USBCN226 often uses a dedicated chipset (sometimes a CH340 or a PL2303 variant). Installing the wrong driver can cause: amsamotion usbcn226 driver download link
Many third-party 鈥渄river download鈥� websites are filled with fake download buttons, malware, and adware. Please do not click on giant green buttons that say 鈥淒ownload Now鈥� unless you are certain of the source. The safest place to find the amsamotion usbcn226 driver download link is via the chipset manufacturer, not Amsamotion itself (as the company does not maintain a publicly facing modern support portal for this legacy device). This suggests a problem with the USB connection
AMSAMOTION USB-CN226 Driver Download & Installation Guide The is a high-quality USB-to-serial programming cable designed specifically for Omron PLC systems (such as CS, CJ, and CQM1H series). It enables reliable communication between your computer and the industrial PLC for programming, monitoring, and debugging. Repeat this for all USB Root Hubs
Direct the search to the "WIN" or "Driver" folder in your downloaded package.
For some CH340 chips, you may need to allow unsigned drivers: