Chapter 5 Parameters_VFD-B Series
Revision 10/2005, BE13, SW V4.08 5-107
NOTE
The parameter can be set during operation for easy tuning.
10 - 03
aIntegral Gain ( I ) Unit: 0.01
Settings 0.00 to 100.00 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 00 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
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