SRVO-068
Pulsecoder Serial Data Error
Fanuc · R-30iB Mate + Mate Plus Robot
What does SRVO-068 mean?
The serial Pulsecoder fails to return serial data in response to a request signal. This indicates a communication fault between the servo amplifier and the Pulsecoder, potentially due to loose connections, damaged cabling, or a faulty Pulsecoder itself.
Repair Steps
- 1
Ensure the robot connection cable (RMP1, RP1) connector (CRF8) on the 6-Axis servo amplifier and the connector on the motor side are tightly connected.
- 2
Check that the shielding of the robot connection cable (RMP1, RP1) is securely grounded in the cabinet.
- 3
Replace the Pulsecoder.
- 4
Replace the servo amplifier.
- 5
Replace the robot connection cable (RMP1, RP1, RM1).
- 6
Replace the internal cable of the robot (for the Pulsecoder, or for the Motor).
Verified technical data. Last updated: March 2026
Source: Fanuc R-30iB Mate + Mate Plus Robot