If SRVO-130 (Serial Pulse Error) appears, try these immediate actions:
These steps may resolve temporary communication or signal inconsistencies.
FANUC Alarm SRVO-130 (Serial Pulse Error) occurs when the controller detects irregular or missing pulse signals from the encoder.
The serial pulse system is responsible for:
When the pulse signal is lost or corrupted, the robot stops to prevent inaccurate movement.
SRVO-130 indicates that the encoder’s serial pulse communication is abnormal or missing.
This typically includes:
Cable faults are a leading cause.
Common issues include:
1. Broken or worn wires
2. Loose or disconnected connectors
3. Shielding damage leading to signal interference
Improper contact can disrupt serial pulse signals.
Common issues include:
1. Oxidized or bent pins
2. Poorly seated connectors
3. Contaminated surfaces
The encoder itself may fail.
Common issues include:
1. Internal circuit malfunction
2. Signal instability due to wear or heat
3. Mechanical damage
The amplifier processes encoder signals before sending them to the controller.
Common issues include:
1. Feedback processing faults
2. Hardware degradation
3. Signal decoding errors
External interference can corrupt serial pulse signals.
The following components are commonly required when resolving SRVO-130 alarms:
Browse available FANUC spare parts at inrobots.shop for fast replacement and global delivery.
A fast and reliable method used by FANUC maintenance engineers:
Swap Encoder Cables Between Axes
Interpret Results:
Why Signal Cables Matter:
Signal cables carry the critical serial pulse data necessary for accurate axis positioning.
Frequent bending, vibration, or proximity to high-power equipment can degrade cables over time, leading to communication issues.
Replacing faulty or aged encoder/signal cables is often the most cost-effective solution to resolve intermittent or repeated SRVO-130 alarms, without needing to replace more expensive components.
Next Step:
Use high-flex FANUC encoder/signal cables, specifically designed to ensure reliable pulse communication and long-term stability in industrial environments.
SRVO-130 indicates serial pulse communication instability:
Ignoring this alarm can cause position errors, motion loss, or system shutdowns.
These alarms are closely related to encoder or feedback system issues.
Encoder cable faults, connector issues, servo motor encoder failure, or amplifier problems are common causes.
Only if the issue is temporary. Persistent alarms require immediate troubleshooting.
Yes, as it affects real-time position feedback and robot safety.
Inspect cables, reseat connectors, and replace faulty components if needed.
Explore the Full Guide: Industrial Robot Fault Codes Library → Fanuc Alarm Codes
Explore the complete guide for troubleshooting, repair strategies, and component replacement across industrial robot systems.
Key components commonly involved in fanuc alarm troubleshooting issues and replacements.
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