Ghisalba VFD-E Series - Page 145

Chapter 5 Parameters
_
VFD-E Series
5-100 Revision August 2006, 01EE, SW--PW V1.03/CTL V2.03
The parameter can be set during operation for easy tuning.
10.03 aIntegral 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 aDerivative 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.
10.06
Primary Delay Filter Time
Unit: 0.1
Settings 0.0 to 2.5 sec Factory Setting: 0.0
 To avoid amplification of measurement noise in the controller output, a derivative digital filter
is inserted. This filter helps to dampen oscillations.