PID SET UP WITH FRENIC Eco series inverter.
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Note: if these functions are set up with the same data, the operation priority is given
in the following order E61 > E62 > E63.
J03. PID control (P-gain).
This parameter is used to set the proportional (P) gain of the PID controller.
This parameter has to be tuned on site, the value depends on the application.
Factory setting is 0.10.
J04. PID control (I-gain).
This function is used to set the integral (I) time of the PID controller.
This function has to be tuned on site, the value depends on the application.
Factory setting is 0.0 s; with this value the PID will not work properly.
J05. PID control (D-gain).
This function is used to set the derivative (D) gain of the PID controller.
This function has to be tuned on site, the value depends on the application.
Factory setting is 0.00 s.
J06. PID control (Feedback filter).
This function is used to set the time constant of the filter for PID control feedback
signal, in seconds.
This function has to be tuned on site, the value depends on the application.
Factory setting is 0.5 s.
The following 3 parameters are especially designed for pump applications.
These function codes specify the data for the slow flowrate stop in pump control, a
feature that stops the inverter when there is no water consumption.
Slow flowrate stop function
When the discharge pressure has increased, decreasing the reference frequency
(output of the PID processor) below the stop frequency for slow flowrate level (J15)
for more than the elapsed stopping time on slow flowrate level stop latency (J16), the
inverter decelerates to stop, while PID control itself continues to operate. When the
discharge pressure decreases, increasing the reference frequency (output of the PID
processor) above the starting frequency (J17), the inverter resumes operation.
If we need to have a signal indicating the state in which the inverter is stopped due to
the slow flowrate stop feature, we have to assign PID-STP function (Inverter stopping
due to slow flowrate under PID control ) to one of the general-purpose output terminal
(function code data = 44).
J15. PID Control (Stop frequency for slow flowrate).
Specifies the frequency which triggers slow flowrate stop of inverter.
Factory setting is 0 Hz.
J16. PID Control (Slow flowrate level stop latency).
Specifies the elapsed time from when the inverter stops operation due to slow
flowrate level condition.
Factory setting is 30 s.
