Delta Electronics VFD-E manual 10.03, 10.04, 10.05

Chapter 4 Parameters

NOTE

The parameter can be set during operation for easy tuning.

10.03	Integral Time ( I )		Unit: 0.01
	Settings	0.00 to 100.0 sec	Factory Setting: 1.00
		0.00 Disable

This parameter specifies integral control (continual sum of the deviation) and associated gain

(I). When the integral gain is set to 1 and the deviation is fixed, the output is equal to the input (deviation) once the integral time setting is attained.

NOTE

The parameter can be set during operation for easy tuning.

10.04	Derivative Control (D)		Unit: 0.01
	Settings	0.00 to 1.00 sec	Factory Setting: 0.00

This parameter specifies derivative control (rate of change of the input) and associated gain

(D). With this parameter set to 1, the PID output is equal to differential time x (present deviation − previous deviation). It increases the response speed but it may cause over- compensation.

NOTE

The parameter can be set during operation for easy tuning.
10.05	Upper Bound for Integral Control		Unit: 1
	Settings	0 to 100 %	Factory Setting: 100

This parameter defines an upper bound or limit for the integral gain (I) and therefore limits the Master Frequency.

The formula is: Integral upper bound = Maximum Output Frequency (Pr.01.00) x (Pr.10.05). This parameter can limit the Maximum Output Frequency.

Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11 4-133