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Adjusting PID Control
Step Response
This section explains how to adjust PID control parameters while observing the step response of the
control object.
1. Measuring the Step Response Waveform
Use the following procedure to measure the step response waveform.
a) Connect a load under the same conditions as for normal operation.
b) Set parameter b5-01 to “0” (PID control disabled).
c) Set the Inverter’s acceleration time as low as possible, and input the step frequency reference.
d) Measure the response waveform of the feedback (i.e., the detection value).
Note Conduct the measurement so as to know the timing with the step input.
2. Calculating the PID Parameters
Draw a tangential line at the steepest point of the gradient of the step response waveform mea-
sured in procedure 1.
Measuring R
Measure the inclination of the tangential line, with the target value as “1.”
Measuring L
Measure the time (unit: seconds) until the tangential line from the beginning of the step input joins
the time axis.
Measuring T
Measure the time (unit: seconds) from the point where the tangential line joins the time axis to the
point where it meets the target value.
Target value
Response
Time
Advanced Operation
Chapter 6
Содержание SYSDRIVE 3G3FV
Страница 1: ...USER S MANUAL High function General purpose Inverter SYSDRIVE 3G3FV Cat No I516 E1 4 ...
Страница 16: ...Chapter 1 Introduction 1 1 Function 1 2 Nomenclature 1 3 New Functions 1 ...
Страница 33: ...Chapter 2 Installation 2 1 Mounting 2 2 Wiring 2 ...
Страница 112: ...Chapter 4 Trial Operation 4 1 Procedure 4 2 Operation Example 4 ...
Страница 289: ...Chapter 7 Parameter Lists 7 1 Initialize Mode Parameters 7 2 Program Mode Parameter List 7 ...
Страница 366: ...Chapter 9 Specifications 9 1 Inverter Specifications 9 2 Option Specifications 9 ...
Страница 395: ...Chapter 10 Appendix 10 1 Notes on Using the Inverter for a Motor 10 ...