Parameter Group 3 – Pid Control - Invertek Drives Optidrive ODP-2 User Manual

8.2. Parameter Group 3 – PID Control
8.2.1. Overview
Optidrive P2 provides an internal PID controller. Parameters for configuration of the PID controller are located together in Group 3.
For simple applications, the user needs to only define the setpoint source (P3-05 to select the source or P3-06 for a fixed setpoint),
feedback source (P3-10) and adjust the P Gain (P3-01), I time (P3-02) and optionally the differential time (P3-03).
The PID operation is uni-directional, and all signals are treated as 0 – 100% to provide a simple, intuitive operating format.
8.2.2. Parameter List
Par
P3-01 PID Proportional Gain
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 PID Integral Time Constant
PID Controller Integral Time. Larger values provide a more damped response for systems where the overall process responds slowly.
P3-03 PID Differential Time Constant
PID Differential Time Constant.
P3-04 PID Operating Mode
0 Direct Operation
1 Inverse Operation
P3-05 PID Reference (Setpoint) Source Select
0 PID Reference (Setpoint)
Source Select
1 Analog Input 1 Setpoint
2 Analog Input 2 Setpoint
P3-06 PID Digital Reference (Setpoint)
When P3-05 = 0, this parameter sets the preset digital reference (setpoint) used for the PID Controller. Where the feedback is provided
from a transducer such as a pressure transducer or level measurement, this represents the percentage of the pressure range (e.g. for a 0 –
10 Bar transducer, 4 bar = 40%) or the level.
P3-07 PID Controller Output Upper Limit
Limits the maximum value output from the PID controller.
P3-08 PID Controller Output Lower Limit
Limits the minimum output from the PID controller.
P3-09 PID Output Limit Control
0 Digital Output Limits
1 Analog Input 1 Provides a
Variable Upper Limit
2 Analog Input 1 Provides a
Variable Lower Limit
3 PID output Added to
Analog Input 1 Value
P3-10 PID Feedback Signal Source Select
0 Analog Input 2
1 Analog Input 1
2 Output Current
3 DC Bus Voltage
4 Differential : Analog Input 1 – Analog Input 2
5 Largest Value : Analog Input 1 or Analog Input 2
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Parameter Name
Use this mode if an increase in the motor speed should result in an increase in the
feedback signal.
Use this mode if an increase in the motor speed should result in a decrease in the
feedback signal.
P3-06 is used.
Analog Input 1 as displayed in P0-01 is used.
Analog Input 2 as displayed in P0-02 is used.
The output range of the PID controller is limited by the values of P3-07 & P3-08.
The output range of the PID controller is limited by the values of P3-08 & the signal
applied to Analog Input 1.
The output range of the PID controller is limited by the signal applied to Analog Input 1 &
the value of P3-07.
The output value from the PID Controller is added to the speed reference applied to the
Analog Input 1.
Minimum Maximum
0.1 30.0
0.0 30.0
0.00 1.00
0 1
0 2
0.0 100.0
P3-08 100.0
0.0 P3-07
0 3
0 1
Version 3.00 | Optidrive P2 User Guide | 49
Default Units
1.0 -
1.0 s
0.00 s
1 -
0 -
0.0 %
100.0 %
0.0 %
0 -
0 -
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