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Operating Guide | VACON® NXS/NXP Air-cooled
12.10.113 Fault 43 - Encoder fault, Subcode S10 - Sin/Cos encoder feedback is missing
Cause
Problem detected in encoder signals.
For the closed loop control, encoder modes "EnDat only" or "SSI only" (absolute channel only) are not allowed.
Troubleshooting
•
Do a check of the wiring, jumper settings, and encoder mode.
•
Change OPTBE "Operating mode" parameter is either "EnDat+SinCos", "SSI+SinCos" or "SinCos only", or avoid using closed loop
control.
12.10.114 Fault 43 - Encoder fault, Subcode S11 - Encoder angle is drifting
Cause
Error angle between the angle read from the absolute channel and the angle calculated from the incremental channels.
Troubleshooting
•
Check the encoder cable, cable shield, and grounding of the cable shield.
•
Check the mechanical mounting of the encoder and make sure that the encoder is not slipping.
•
Check the encoder parameters (for example, encoder ppr).
12.10.115 Fault 43 - Encoder fault, Subcode S12 - Dual speed supervision fault
Cause
Encoder speed supervision. The difference between the encoder speed and estimated speed is too large. Dual speed supervision:
Estimated speed and encoder speed difference is too high (0.05 x f
EstimatedShaftFrequency.
Troubleshooting
•
Check the encoder speed signal ShaftFrequency vs. EstimatedShaftFrequency.
•
If the ShaftFrequency is incorrect, check the encoder, cable, and encoder parameters.
•
If the EstimatedShaftFrequency is incorrect, check the motor parameters.
12.10.116 Fault 43 - Encoder fault, Subcode S13 - Encoder angle supervision fault
Cause
The estimated shaft position error (estimated angle - encoder angle) is more than 90° electrical.
See variable EstimatedAngleError.
Danfoss A/S © 2020.02
or minimum motor nominal slip frequency). See variable
n
Specifications
AQ275638903263en-000301 / DPD00910| 227
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