Veichi JT550 Series Manual page 100

Chapter 7 Maintenance and Troubleshooting
F6.09 V/F slip compensation gain
It can compensate the rotational speed slip of the asynchronous motor when the load of the motor
increases, stabilizing the motor speed in case of load change. If this parameter is set to 100%, it indicates that
the compensation when the motor bears rated load is the rated motor slip. The rated motor slip is
automatically obtained by the inverter through calculation based on the rated motor frequency and rated
motor rotational speed in group F1.
Generally, if the motor rotational speed is different from the target speed, slightly adjust this parameter.
F6.10 V/F over-excitation gain
If actual deceleration time cannot satisfy the requirement, increase the value of F3-10 (V/F over
excitation gain) adequately.
When using braking resistor, braking unit or energy feedback unit, set F6.10 (V/F over-excitation gain)
to 0. Otherwise, too large current may occur during drive running.
F6.11 V/F oscillation suppression gain
Set this parameter to a value as small as possible in the prerequisite of efficient oscillation suppression
to avoid influence on V/F control.
Set this parameter to 0 if the motor has no oscillation. Increase the value properly only when the motor
has obvious oscillation. The larger the value is, the better the oscillation suppression result will be.
When the oscillation suppression function is enabled, the rated motor current and noload current must be
correct. Otherwise, the V/F oscillation suppression effect will not be Satisfactory.
F6.13 Limited flow protection function selection
F6.14 Current limiting protection value
F6.15 Limited current protection action time
When F6.13=1 and output current exceeds the value set in F6.14, the duration greater than f6.15, the
inverter will show Error 28 and stop.
Range:0.0%~200.0%
Range:0~200
Range:0~100
Range：0~1
Range：0~600（A）
Range： 0.0~60.0 （ s）
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JT550 Series Inverter Manual
Default:0.0%
Default:64
Default:Mode dependent
Default：0
Default：70
Default：02.0