Galaxy, No serial communication, Prolific or Moxa adapter/port locked up
Potential Symptoms
- Unable to get status to the display.
- Venus is set to connect to the correct COM Port.
- TX LED may be lit solid Red on the signal converter or J-box, or there are no blinking TX or RX lights on the J-box when trying to connect or send content.
- Communication window pops up and disappears right away when attempting to get status.
- In Venus version 3, the display name turns red and the error log shows error code -12 "Unable to Open Communications Port".
- In Venus version 3, when running a loopback on the DB9 end of the USB to serial adaptor the response is "Connection Failure" or "No Response".
- Venus 1500 v4 alert: unable to connect to the display or No Response.
- Device Manager may recognize the adapter, and may report problems installing the driver or will not install the driver at all.
- Device Manager might show "this device is working properly".
A loopback test on USB to serial adaptor fails.
Environment
- Product: Galaxy, Serial Communication
- Component: USB to serial adapter (Prolific/Moxa)
- Control System: Venus 1500 V3 or V4
Cause
- USB Adapter is not working / locked up.
Resolution
- Reseat the Adapter: Unplug the USB adaptor from the USB port on the computer for 30 seconds then plug back into same port.
- May also be accomplished by disabling the adapter then re-enabling it in Device Manager.
- If issue is recurrent, replace adapter.
- NOTE: MOXA is the recommended cable to use on any OS, Windows 7 and up. If you do not have a MOXA, see: "USB to serial adapter (non-Moxa), Unable to publish messages to display on Windows 7 or 8 OS, Reseating adaptor temporarily fixes issue, DD2313704"
KB ID: DD2112087
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