Yaskawa F7 Drive User Manual - Manual (Page 152)

Diagnostics & Troubleshooting 6 - 27
If the Motor Rotates Even When Drive Output is Stopped
If the motor rotates even when the Drive is stopped due to a large internal load, DC-injection braking may be necessary. Adjust
the DC injection braking as follows:
• Increase parameter b2-04 (DC Injection Braking (initial excitation) Time at Stop).
• Increase parameter b2-02 (DC Injection Braking Current).
If Output Frequency Does Not Rise to the Frequency Reference
Use the following information if the output frequency does not match the frequency reference.
The frequency reference is within the jump frequency range.
When the jump frequency function is used, the output frequency does not change within the jump frequency range. Check to
be sure that the Jump Frequency (d3-01 to d3-03) and Jump Frequency Width (d3-04) settings are suitable.
The frequency reference upper limit has been reached.
The output frequency upper limit is determined by the following formula:
Freq Ref Upper Limit = Maximum Output Frequency (E1-04)
× Frequency Reference Upper Limit (d2-01) / 100
Check to be sure that the parameter E1-04 and d2-01 settings are suitable.