PID SET UP WITH FRENIC Eco series inverter.
3
4. Explanation of the PID set up for FRENIC Eco
Many books and software packages have been written to explain and simulate a PID
controller. Therefore this application note is not meant to be complete. The
description below is a starting point for setting the PID parameters and to stay out of
trouble.
In order to set-up a PID-Control you have to follow 3 Steps.
1
st
Step:
Basic
set up of the inverter
In order to do this you have to set the following Parameters:
Fundamental Parameters:
F03. Maximum frequency 1.
This function sets the maximum output frequency for motor 1, in Hz.
Factory setting is 50 Hz.
F04. Base frequency 1.
This function sets the maximum output frequency in the constant-torque range of
motor 1 or the output frequency at the rated output voltage, in Hz.
Factory setting is 50 Hz.
F05. Rated voltage 1 (at Base frequency 1).
This function sets the rated value of the voltage output to motor 1, in volts. Note that
a voltage greater than the supply (input) voltage cannot be output.
Factory setting is 400 V.
F06. Maximum output voltage 1 (at Maximum frequency 1).
This function sets the maximum value of the voltage output for motor 1, in volts. Note
that a voltage higher than the supply (input) voltage cannot be output.
Factory setting is 400 V.
F07. Acceleration time 1.
This function sets the acceleration time for the output frequency from 0 to maximum
frequency, in seconds. For PID control the value of this function has to be small,
otherwise the system will become unstable.
Factory setting is 20.0 s.
F08. Deceleration time 1.
This function sets the deceleration time from maximum frequency to 0, in seconds.
For PID control the value of this function has to be small, otherwise the system will
become unstable.
Factory setting is 20.0 s.
F09. Torque boost 1.
This function is used to select the torque boost characteristic that the inverter will use.
The following can be selected:
