Debugging and maintenance of EPSON RC90/RC90-B controller

Check the voltage of pins 3-4 and 16-17 (+24V should be normal for 24V).

If the TP port is not connected to the teaching pendant, confirm that the bypass plug has been inserted.

If an external safety relay is used, check its output contact status.

10.5 Remote I/O not responding

Phenomenon: After the Start signal is input, the robot does not move and the Ready output is normal.

handle:

Check if the control device is set to "Remote" (System Configuration → Controller → Control Device in RC+).

Check if the AutoMode output is ON (if OFF, it means the controller is not in remote ready state).

Confirm the input status of the safety gate (SafeguardOn output should be OFF to operate).

10.6 Encoder battery alarm (error 401/9018)

Phenomenon: After the robot is powered on, it requires resetting the encoder.

handle:

Replace the battery of the robotic arm body (non controller battery).

Execute the ENC-RET command to reset the multi cycle data, and then recalibrate the origin.