Fuji Electric FRENIC-HVAC User Manual page 503

 PID control 1, 2 (Tuning manipulated value) (J109, J209)
J109 (J209) specifies a speed change value to apply during tuning. The moment you specify
the change value, the inverter outputs the "current frequency + J109 (J209) setting."
- Data setting range: 10 to 100% (Maximum frequency = 100%, Initial value 10%)
Requisites for PID tuning
To perform tuning, observe the following beforehand.
 Make a trial run under speed control and confirm that there is no problem for inverter
running under actual load.
 Make feedback signal settings and confirm that the inverter can monitor the signal levels.
 Make PID control related settings to make the inverter ready for PID control.
 Since tuning changes the speed step by step, investigate the tuning manipulated value so
that PV (feedback signal) does not drop below 0% or exceed 100%. Post the result to J108
(J208).
 Change the speed under speed control beforehand to figure out an approximate time
constant of feedback signals for determining whether to perform short-time or long-time
response tuning.
PID tuning procedure
(1) Enter a run command to run the inverter.
(2) Put the inverter into a feedback signal (PV) stabilized state under PID control.
(3) Set J108 (J208) to "1" (Short-time response) or "1" (Long-time response)>
(4) Wait for tuning to complete, checking the progress bar on the LCD monitor.
(5) If tuning ends normally, the setting of J108 (J208) reverts to "0." If any error occurs, the
error code is posted to J108 (J208). Remove the error cause and perform tuning again.
PID tuning notes
 Since tuning changes the speed step by step, to deal with unexpected incidents, get ready to
immediately shut down run commands or enter a coast-to-stop command.
 To perform tuning with J108 (J208) being set to "2" (Long-time response), increase the
setting of J113 (J213) (Feedback filter) to stabilize feedback signals (PV). Unstabilized PV
may result in a long-time waiting state for stabilized PV.
6.3 Details of Function Codes
6-193