(A) Application parameters
● The PID gain tuning status can be checked with the read value of Pr. 1219 or the PID gain tuning
status monitor. The PID gain tuning status monitor is displayed instead of the output voltage
Tab. 5-183: PID gain tuning status monitor
● When PID gain tuning is completed, the following parameters are automatically set.
: The calculation result is applied. —: "9999" is set.
Tab. 5-184: Automatically set parameters after completion of PID gain tuning
● To forcibly terminate the tuning during PID gain tuning, perform any of the following operations.
– Turning OFF the PID gain tuning start/forced end signal (PGT).
– Setting Pr. 1219 "PID gain tuning start/status" = "8".
– Selecting the PID gain tuning forced end (8.END) in the function menu on the operation panel
– Turn the power supply OFF, reset the inverter, or turn OFF the start command.
By PID gain tuning, the settings of the PID constant parameters (Pr. 129, Pr. 130, Pr. 134, Pr. 756 to
Pr. 758) are automatically changed. Before performing PID gain tuning, record the PID constant
parameter settings before tuning as required.
PID gain tuning also requires setting of the PID upper limit (Pr. 131 or Pr. 1143), PID lower limit
(Pr. 132 or Pr. 1144), PID deviation limit (Pr. 553 or Pr. 1145).
Changing the terminal assignment with Pr. 178 to Pr. 189 may affect other functions. Set parame-
ters after confirming the function of each terminal.
By PID gain tuning, the amount of operation is changed considerably. In some applications such
as a winding machine, materials may be affected.
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PID gain tuning status
Tuning forced end
Step response method
Limit cycle method