Code

Name

Causes

Possible Solutions

oS

Overspeed

There is overshoot.

  • Decrease C5-01 [ASR Proportional Gain 1] and increase C5-02 [ASR Integral Time 1].

  • Adjust the pulse train gain with H6-02 to H6-05 [Pulse Train Input Setting Parameters].

There is an incorrect number of PG pulses set in the drive.

Set H6-02 [Terminal RP Frequency Scaling] to the pulse train frequency during 100% reference (maximum motor rotation speed).

The oS detection level is set incorrectly.

Adjust F1-08 [Overspeed Detection Level] and F1-09 [Overspeed Detection Delay Time].
Note:

  • The drive detects this error if the motor speed is more than the value set in F1-08 for longer than F1-09.

  • If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.

  • If the drive detects this error, it will operate the motor as specified by the stopping method set in F1-03 [Overspeed Detection Selection].