Applicable Systems
S7-1200
S7-1500
S7-300
S7-400
LOGO!
SINAMICS
Symptoms
Encoder pulse loss: missing encoder pulses detected.
Possible Causes
- Encoder disk damage
- Encoder sensor contamination
- Signal dropout
Troubleshooting Steps
- Step 1: Inspect encoder disk
Disk clean and undamaged - Step 2: Clean encoder sensor
Sensor clean - Step 3: Verify pulse count
Pulse count matches expected
How to Reset
Reset via operator panel after encoder pulse integrity is restored.
Source: Siemens SINAMICS G120 List Manual
Category: PLC & VFD