Danfoss VACON NX All-in-One Application Manual page 346

VACON® NX All-in-One
Application Guide
Troubleshooting
• Check cabling between encoder and OPTBE, especially Data and Clock signals.
• Check that actual encoder type matches with OPTBE "Operating mode" parameter.
11.1.115 Fault 43 - Encoder fault, Subcode S7 - Ch A / Ch B Mismatch
Cause
Problem detected in encoder signals.
Encoder channels A and B are mismatched.
Troubleshooting
Do a check of the cable connections and terminals.
11.1.116 Fault 43 - Encoder fault, Subcode S8 - Resolver/Motor pole pair mismatch
Cause
Problem detected in parameterization of option board.
There is a mismatch of the resolver/ motor pole pair number. Resolver pole pair number (if >1) is not matching the motor pole pair
number.
Troubleshooting
Check that OPTBC parameter "Resolver Poles" and possible Gear Ratio parameters in application match motor pole count.
11.1.117 Fault 43 - Encoder fault, Subcode S9 - Missed Start Angle
Cause
Encoder zero positioning identification run has not been made.
The encoder start angle is missing.
Troubleshooting
Make encoder identification run.
11.1.118 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.
11.1.119 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).
11.1.120 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
matedShaftFrequency.
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.
346 | Danfoss A/S © 2023.02
or minimum motor nominal slip frequency). See variable Esti-
n
Fault Tracing
AB296635287482en-000301 / DPD00903