SRVO-075
Pulse Not Established
Fanuc · R-30iB Mate + Mate Plus Robot
What does SRVO-075 mean?
This alarm (G:i A:j) indicates that the absolute position of the Pulsecoder cannot be established. This typically occurs during startup or after a power cycle if the encoder's absolute position data is lost or corrupted, preventing the robot from determining its current joint angles.
Common Causes
- Initial pulse signal from the pulsecoder has not been established within the expected timeframe.
- Pulsecoder not providing a valid position reference signal at startup.
- Encoder initialization error during servo system power-up.
- Faulty pulsecoder unable to generate initial homing or reference pulses.
- Incorrect homing procedure or missing reference marker detection.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Reset the alarm condition.
- 2
Jog the affected axis until the alarm no longer occurs, allowing the Pulsecoder to re-establish its position.
Verified technical data. Last updated: March 2026
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Source: Fanuc R-30iB Mate + Mate Plus Robot