Error Code Database
Panasonic Alarm 21.0
Encoder Communication Disconnect
Possible Causes
1. Encoder cable is broken or disconnected.
2. Loose connector at motor or drive side.
3. Encoder voltage drop due to long cable length.
Recommended Solution
- Check encoder cable continuity and connections.
- Ensure shield is connected to FG (Frame Ground).
- If cable is long, check 5V supply at the encoder end.
- Replace encoder cable.
Still seeing Error 21.0?
If the troubleshooting steps above didn't resolve the issue, your Panasonic hardware likely has a component failure.
Fast Turnaround • 3-12 Month Warranty