Delta Electronics VFD-G manual Primary Low Pass Filter Time

Chapter 4 Parameters
10 - 07	Primary Low Pass Filter Time		Unit: 0.1
	Settings	0.0~2.5 Sec	Factory Setting: 0.0

This parameter determines primary Low Pass filter time.

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		Unit: 0.01
	Settings	0.01~160.00Hz	Factory Setting: 600.00

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		Unit: 0.1
	Settings	0.0~3600.0 Sec	Factory Setting: 0.0
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
			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

4-88 Revision July 2008, EG03, SW V1.06