505Fault · Encoder / feedbackUsually repairable
SIMODRIVE 611U 505: Measuring Circuit Error, Motor Measuring System Absolute Track
What 505 means
The absolute track of the motor encoder is interrupted, or an EnDat absolute encoder failed to initialize.
Symptoms
Fault at power-up or after a cable is disturbed; position is lost.
Is it repairable?
Yes: absolute encoders are repaired or replaced and aligned to the motor.
Common causes
- Wrong cable type or damaged cable
- Encoder type set wrong in the drive
- Failed absolute encoder
Safe checks
- 1Confirm the cable is the correct type for the encoder
- 2Check the encoder type parameter
- 3Inspect the connectors for bent pins
Drives hold dangerous voltage after power-off. Checks should only be done by qualified personnel, with power isolated and the DC link discharged.
Reviewed by AutomIQ repair technicians. Code and name from the SIMODRIVE 611 universal Function Manual.
Related SIMODRIVE 611U faults
- 003NMI due to watchdog
- 006Checksum test error
- 020NMI due to cycle failure
- 028Actual current sensing during power-up
- 504Measuring circuit error, motor measuring system
- 507Synchronization error, rotor position