Delta Electronics AC Motor Drive VFD-EL - Manual (Page 144)

Chapter 4 Parameters|
Revision August 2008, 2ELE, V1.02 4-101
When P is greater than 1, it will decrease the deviation and get the faster response speed. But
if setting too large value in Pr.10.02, it may cause the increased deviation during the stable
area.
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.
It can use integral time to eliminate the deviation during the stable area. If setting too large
value in Pr.10.03, it may cause lower system response.
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