The OTC Welbee power source communicates with the robot controller over a fieldbus network connection. When the power source cannot talk with the robot controller then the error code E-920 may be displayed on the power source's display.
In this article, you'll learn how to check and fix common causes to this problem.
Restart the Power Source
If you've recently made changes to the robot's network settings or reconnected the power source's network cable to the robot's controller, simply restarting the power source may re-establish the connectivity.
Check the Power Source's Network Cable
Ensure that the network cable is firmly connected to both the power source and the receptacle port on the robot's cabinet. The power source comes with a screw-in type, industrial network cable. Align the pins correctly then screw the cable into place.
Check the Robot's USB-to-Ethernet Adapter
Inside the robot's cabinet is a USB-to-Ethernet adapter that bridges the fieldbus network port from the outside of the robot cabinet to the robot controller. Ensure the network cable is firmly connected to the adapter and that the adapter is firmly connected to the robot controller. You should see either a solid or a blinking light on the adapter.
Check that EtherNet/IP Service is Enabled
On the teach pendant, navigate to Settings > Security > Services.
Ensure the EtherNet/IP interface is enabled. You may need to enter the admin password to make any changes.
If you enabled the service, reboot the robot for the change to take effect.
Check the Fieldbus Ethernet Adapter's Status
On the teach pendant, navigate to Installation > Fieldbus > EtherNet/IP.
Note the color of the dot at the top of the screen and the adapter's status.
If you see a green dot 🟢, the fieldbus network is good.
If you see a gray dot ⚪️, the service is disabled.
Enable it.
Recreate the eth1 network interface with the Beacon eth1 Network Magic Script.
Reboot the robot.
If you see a yellow dot 🟡, the fieldbus network has an issue.
Recreate the eth1 network interface with the Beacon eth1 Network Magic Script.
Reboot the robot.
Check the Robot's eth0 and eth1 Network Settings
On the teach pendant, navigate to Installation > URCaps > Beacon.
You should see an eth0 and an eth1 setting, each with their own IP address.
If you don't see eth1, or eth1 is not assigned to 192.168.181.149, the fieldbus network has an issue.
Recreate the eth1 network interface with the Beacon eth1 Network Magic Script.
Reboot the robot.