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6-22
6-3-7 PID Adjustments
H
PID Adjustments with Step Response Method
·
The following describes how to adjust each parameter of PID control by monitoring the
step response of the target of control.
1.
Measurement of Step Response Waveform
Take the following steps to measure the step response waveform of the target of con-
trol.
a) Connect the load in the same way as the connection of the load to the Inverter in
normal operation.
b) Set n128 to 0 so that the Inverter will not perform PID control.
c) Minimize the acceleration time and input the step frequency reference.
d) Measure the response waveform of the feedback.
Note
Measure the response waveform so that the timing of the step input will be
known.
2.
Calculation of PID Parameters
S
Draw a tangent line that comes into contact with the steepest inclination point of the
response waveform.
S
Measurement of R
Measure the gradient of the tangent line provided that the set point is 1.
S
Measurement of L
Measure the required time (seconds) between the origin and the point of intersec-
tion of the tangent line and time axis.
S
Measurement of T
Measure the required time (seconds) between the point of intersection of the tan-
Advanced Operation
Chapter 6
Summary of Contents for SYSDRIVE 3G3MV A2002
Page 1: ...USER S MANUAL SYSDRIVE 3G3MV Multi function Compact Inverter Cat No I527 E2 02...
Page 15: ...Chapter 1 Overview 1 1 Function 1 2 Nomenclature 1 3 New Features 1...
Page 24: ...Chapter 2 Design 2 1 Installation 2 2 Wiring 2...
Page 89: ...Chapter 4 Test Run 4 1 Procedure for Test Run 4 2 Operation Example 4...
Page 286: ...Chapter 9 Specifications 9 1 Inverter Specifications 9 2 Option Specifications 9...
Page 311: ...Chapter 10 List of Parameters 10...
Page 342: ...Chapter 11 Using the Inverter for a Motor 11...
Page 348: ...Appendix A Standard Models...