Signal level too low

What does F13.6 mean?

The signal level from Encoder 1 is too low, falling below the permitted limit during monitoring. This indicates a problem with the wiring, external electromagnetic interference (EMC), or a faulty encoder, leading to unreliable position feedback.

• High resistance or open circuit in one or more Encoder 1 signal lines (e.g., A+, A-, B+, B-) due to broken wire or poor crimp.
• Degraded or damaged Encoder 1 cable insulation causing significant signal attenuation over distance.
• Excessive electromagnetic interference (EMI) overriding or degrading the Encoder 1 signal.
• Faulty Encoder 1 output stage causing weak or corrupted signals.
• Incorrect termination resistance (e.g., P6-05 Encoder termination) configured for the encoder type.

Click steps to track your progress.

1. 1

   Measure the voltage levels of Encoder 1's differential signals (e.g., A+ to A-, B+ to B-) at the drive's encoder input terminals (e.g., X11) using an oscilloscope.

2. 2

   Check the continuity and resistance of each conductor in the Encoder 1 cable from the encoder to the drive.

3. 3

   Verify Encoder 1's supply voltage (e.g., 5VDC or 24VDC) at the encoder terminals.

4. 4

   Ensure the cable shielding is properly grounded at both ends or as recommended by the manufacturer.

5. 5

   Confirm the correct termination resistance (e.g., P6-05 setting) is selected in the drive's parameters for the specific encoder type.