Pulsecoder Serial Data CRC Error
Fanuc · R-30iB Mate + Mate Plus Robot
What does SRVO-069 mean?
The serial data transmitted from the Pulsecoder was disturbed during communication, resulting in a Cyclic Redundancy Check (CRC) error. This indicates data corruption, which can be caused by electrical noise, poor shielding, or faulty communication components.
Common Causes
- Corrupted data packets transmitted over the pulsecoder serial interface.
- Faulty pulsecoder generating incorrect checksum values.
- Noise or interference corrupting the cyclic redundancy check (CRC) bits.
- Loose or damaged serial communication cables (e.g., P1-31, P1-32).
- Servo controller not correctly interpreting CRC data from the pulsecoder.
Repair Steps & Checklist
Click steps to track your progress.
- 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).