Applicable Systems
S7-1200
S7-1500
S7-300
S7-400
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SINAMICS
Symptoms
Encoder signal unstable: signal jitter or noise detected.
Possible Causes
- Signal interference
- Encoder cable shielding inadequate
- Encoder bearing wear
Troubleshooting Steps
- Step 1: Check encoder cable shielding
Shield properly grounded - Step 2: Eliminate EMI sources
No interference - Step 3: Verify signal with oscilloscope
Signal clean and stable
How to Reset
Reset via operator panel after signal stabilizes.
Source: Siemens SINAMICS G120 List Manual
Category: PLC & VFD