Mitsubishi Electric FR-F820-04750 Instruction Manual page 533

Parameters
Parameter setting for each PID gain tuning method
Set the following parameters according to the selected tuning method (step response method / limit
cycle method).
Pr.
128 (753)
1218
1211
1212
1213
1214
1215
1216
1217
: Parameter to set
Tab. 5-182: Parameter setting for each PID gain tuning method
Execution of PID gain tuning (Pr. 1219, PGT signal)
● While the PID gain tuning function is enabled (Pr.1218 ≠ "0"), PID gain tuning is started when any
of the following operations is performed during PID control.
– Turning ON the PID gain tuning start/forced end signal (PGT).
– Setting Pr.1219 "PID gain tuning start/status" = "1".
– Selecting the PID gain tuning start (1.RUN) in the function menu on the operation panel (FR-
DU08).
Fig. 5-177:
● To use the PGT signal, set "81" in any of Pr. 178 to Pr. 189 (input terminal function selection) to
assign the function to an input terminal.
FR-F800
Tuning method
Step response Limit cycle
method method
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Selection of PID gain tuning start
Item Description
PID action selection Select the PID action.
PID gain tuning setting Select the PID gain tuning operation.
Set the timeout time for PID gain tuning.
PID gain tuning
A timeout error occurs when the elapsed
timeout time
time exceeds the setting.
Step manipulated Set the step manipulated amount for PID
amount gain tuning.
Step response Set the cycle for sampling of
sampling cycle measurement values for PID gain tuning.
Set the timeout time after the maximum
slope measurement for PID gain tuning.
Timeout time after the
The measurement for tuning is
maximum slope
completed when the elapsed time
exceeds the setting.
Limit cycle output Set the upper limit value of the two-
upper limit position output for PID gain tuning.
Set the lower limit value of the two-
Limit cycle output position output for PID gain tuning.
lower limit (When the setting exceeds the Pr.1215
setting, a tuning error occurs.)
Set the hysteresis of the set point for PID
Limit cycle hysteresis
gain tuning.
(A) Application parameters
Tuning start
I003046E
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