Specifications
5
VFD-G Series
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5-61
Output frequency of PID controller will filter by primary low pass function. This function
could decrease change of output frequency. A long primary low pass time means filter
degree is high and vice versa.
Unsuitable primary low pass filter time setting may cause system oscillation.
10 - 08 PID Feedback Signal Range Factory Setting: 600.00
Settings 0.01~160.00Hz Unit: 0.01
This parameter setting could allow the maximum of PID deviation.
If PID function is normally, it should control the detective value to target value accurately in
the certain time. If AC drive can’t control deviation in the 10-08 setting range during 10-07
setting time, it means PID feedback control is abnormal. The treatment is set as 10-10.
10 - 09 PID Feedback Signal Fault Treatment Time Factory Setting: 0.0
Settings 0.0~3600.0 Sec Unit: 0.1
This parameter is to set the detection time of abnormal PID derivative. If PID deviation
detection time is set to 0.0, the function is disabled.
10 - 10
PID Feedback Signal Fault Treatment
a
Factory Setting: 01
Settings 00: Warn and RAMP stop
01: Warn and COAST stop
02: Warn and keep operating
This parameter is to set treatment of the abnormal PID deviation.
10 - 11 V/F Curve Selection Factory Setting: 00
Settings 00: Determined by group 1
01: 1.5 power curve
02: 1.7 power curve
03: 2 power curve
04: 3 power curve
This parameter is to set V/F curve. If this parameter isn’t set to 00, parameter 01-03 and
01-04 will disable.
Input current of the motor could divide into two orthogonal vectors: magnetic vector and
torque vector. Gap flux, which is produced by Magnetic vector, is in direct proportion with
output voltage of motor. Torque vector produces torque. Torque is in direct proportion with
the result of magnetic vector multiply by torque vector. In theory, if the value of magnet
vector is the same with torque vector (in unsaturated flux condition), the input current is
minimum. If motor loading is unsteady torque loading (loading torque is in direct proportion
with speed. For example, the loading of fan or pump), loading torque is low during low