185
Diagnostics and Troubleshooting
*Additional information at end of section
Error/Message Description Cause/Solution/Troubleshoot
E.OS
Error
Overspeed
(continued)
Excessive current
Incorrect motor data, speci cally the motor
rated speed and frequency relationship for PM
Synchronous Motors (see Section 5.6).
Incorrect Encoder Pole Position (LF.77) for PM
Synchronous Motors. Relearn Encoder Pole
Position as needed (see Section 5.11)
Speed gains set too high or low.
For an unloaded PM Synchronous Motor, then
default speed gains LF.31-33 may be too high,
causing the machine to jerk quickly. If left too
low for normal operation, the drive may not track
the speed.
Modulation gain exceeds maximum.
If the modulation grade in ru42. exceeds 100%
there may be a loss of speed control.
Sudden, excessive movement.
Incorrect motor data, speci cally the motor
rated speed and frequency relationship for PM
Synchronous Motors (see Section 5.6).
Incorrect Encoder Pole Position for PM
Synchronous Motors. Relearn Encoder Pole
Position as needed (refer to Section 5.11)
To Next Page
Loading...
Need help?
General
