608Fault · Positioning / motionUsually repairable
SIMODRIVE 611U 608: Speed Controller Output Limited
What 608 means
The speed controller stayed at its limit for too long: the motor cannot reach the requested speed.
Symptoms
Fault on enable or when the axis starts moving; the axis may run away or not move.
Is it repairable?
Yes: brakes, encoders and motors are repaired and tested under drive control.
Common causes
- Motor brake not releasing
- Mechanical blocking
- Wrong motor or encoder wiring
- Encoder fault
- Incorrect controller data
Safe checks
- 1Check that the brake releases
- 2Turn the axis by hand to feel for blocking
- 3Check motor phase order and encoder cable
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
- 505Measuring circuit error, motor measuring system absolute track