Starting up a UR10e that was in use at another facility within our company. Ripped out all the I/O and peripherals. Wired to use 24VDC from internal supply. Jumpered out all estop and safeguard I/O. When starting robot, the “booting” process throws the C305A4 error. Error suggests to verify power supply. Opened controller to view LEDs indicating power supplies…all are steady green. Safety A and B fast flash RED. FPGA off. Another suggestion was to make sure the robot and controller are paired correctly. Cannot find anything on pairing. Any suggestions on what to do?
Polyscope version 5.12.6-build11.0.2099
Just to clarify; the robot voltage is the 48V supply and not related to the 24V supply.
The pairing, as far as I know, means that it’s the right arm for the controller. UR10e needs more power than UR3e.
I have not encountered this issue myself before, but here’s a few things you might be able to try:
- Monitor the 48V supply if possible while booting (Log tab).
- Check that the cable connecting robot and controller is connected properly. The connectors can be a bit tricky to get to lock right.
- A bit more complicated but could be a loose connection from the power supply to the Safety Control Board. You’ll have to open up the control box to verify this, though. Loosen and tighten the screws on the supply (I have seen this being an issue on CB3s before).
1 Like
Thanks for responding efn.
Yes, I understand the 48V is for the servo motors.
The robot and controller are both UR10e models with same production date.
The fault occurs immediately after starting up the robot. There is no time to press the Log tab to monitor 48V power supply.
You’re correct, the robot-to-controller connector is a bit tricky but it is securely connected. Pins and sockets look good.
Opened up controller, loosened and tightened power supply connections, reseated faston blade connectors at the board.
There are no wires going to the safety control board (small board piggy backed on main board?). The board connects to a white edge style connector. I did not do anything with that connector.
Same fault when booting up robot.
Steve
I opened up the base cover and put my meter on the incoming power (48V) for the robot. Booted up the robot and the meter maxed out at 36.3VDC before the controller faulted out.
i checked the voltage at the output of the controller and it also reads 36.3V max. The output of the power supply reads 47.9V steady.
So the Control Board is not relaying the 48V properly to the arm from the supply. It sounds to me like a faulty Control Board.
Just to be sure, you should measure 48V on the SCB (Control Board) between +IN 48V and GND. And measure 36V on +OUT 48V and GND.
Is your robot still under warranty?
1 Like
Measurements per your comments above. Yellow is 48V output. Green is 38V going to robot. I need to check warranty.
Looks like a fault in the control board, yeah.
You should contact your local distributor no matter what. They’ll help you from this point on. 
1 Like
Thank you efn. Much appreciated!
BTW, UR suggested it was a bad energy eater (EE). Replaced the EE and all was good.
1 Like
interesting. I didn’t know that the EE could cause such a fault. Thank you for the update!
Glad you got it working.
1 Like