Optidrive VTC – User Guide
20
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6.3.
Parameter Group 3 – PID Control
6.4.
Parameter Group 4 – High Performance Motor Control
Par.
Description
Range
Units
Default
Explanation
P3-01
Proportional gain
0.1 to 30.0
-
2.0
PID Controller Proportional Gain. Higher values provide a greater
change in the drive output frequency in response to small changes
in the feedback signal. Too high a value can cause instability
P3-02
Integral time
constant
0.0 to 30.0
seconds
1.0
PID Controller Integral Time. Larger values provide a more damped
response for systems where the overall process responds slowly
P3-03
Differential time
constant
0.00 to 1.00
seconds
0.00
PID Differential Time Constant
P3-04
PID operating
mode
0 : Direct
1 : Inverse
-
0 : Direct
Direct operation – Motor speed
increases
with an increase in the
feedback signal
Inverse Operation – Motor speed
decrease
s with an increase in the
feedback signal
P3-05
PID Setpoint /
reference select
0 : Digital
1 : Analog
-
0 : Digital
Selects the source for the PID Reference / Setpoint
0 : P3-06 is used
1 : Bipolar analog input is used
P3-06
PID digital
reference
0.0 to 100.0
%
0.0
Sets the preset digital PID reference / setpoint
P3-07
PID controller high
limit output
P3-08 to 100.0
%
100.0
Limits the maximum value output from the PID controller
P3-08
PID controller low
limit output
0.0 to P3-07
%
0.0
Limits the minimum output from the PID controller
P3-09
User PID output
limit / function
control
0 : Digital output limits
1 : Analog Upper Limit
2: Analog Lower Limit
3 : PID added to Bipolar
analog input reference
-
0
0 : PID output range limited by P3-07 & P3-08
1 : PID maximum output limited by the signal applied to the bipolar
analog input
2: PID minimum output limited by the signal applied to the bipolar
analog input
3: PID output is added to the speed reference applied to the bipolar
analog input
P3-10
PID feedback
source select
0 : 2
nd
Analog Input
1 : Bipolar analog input
-
0
Selects the source of the PID feedback signal
Par.
Description
Range
Units
Default
Explanation
P4-01
Reserved
-
-
P4-02
Motor parameter
autotune
0 : Disabled
1 : Enabled
-
0
When set to 1, the drive immediately carries out a non-
rotating autotune to measure the motor parameters for
optimum control and efficiency
