NOTE
• Confirm that the measured values are stable when performing PID gain tuning with the step response method. When the
measured values are unstable, the tuning result may not be accurate.
• Accurate measurement of the maximum slope may not be achieved if the Pr.1213 setting is small in the step response method.
PID gain tuning operation setting (Pr.1218)
• Set the PID gain tuning operation in this parameter. The digit in the hundreds place represents the PID loop. The digit in
the tens place represents the tuning method. The digit in the ones place represents the control adjustment method.
Pr.1218 setting
0 (initial value)
100
101
102
111
112
121
122
200
201
202
211
212
221
222
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.
Step response
method
128 (753)
○
1218
○
1211
○
1212
○
1213
○
1214
○
1215
—
1216
—
1217
—
○: Parameter to set
420
5. PARAMETERS
5.11 (A) Application parameters
PID loop
PID gain tuning function disabled
First PID
Second PID
Tuning method
Limit cycle method
○
PID action selection
○
PID gain tuning setting
○
PID gain tuning timeout time
—
Step manipulated amount
—
Step response sampling cycle
Timeout time after the maximum
—
slope
○
Limit cycle output upper limit
○
Limit cycle output lower limit
○
Limit cycle hysteresis
Tuning method
Step response method
Limit cycle method (set-point
control)
Limit cycle method (follow-up
control)
Step response method
Limit cycle method (set-point
control)
Limit cycle method (follow-up
control)
Item
Select the PID action.
Select the PID gain tuning operation.
Set the timeout time for PID gain tuning.
A timeout error occurs when the elapsed time
exceeds the setting.
Set the step manipulated amount for PID gain
tuning.
Set the cycle for sampling of measurement
values for PID gain tuning.
Set the timeout time after the maximum slope
measurement for PID gain tuning.
The measurement for tuning is completed
when the elapsed time exceeds the setting.
Set the upper limit value of the two-position
output for PID gain tuning.
Set the lower limit value of the two-position
output for PID gain tuning. (When the setting is
the Pr.1215 setting or higher, a tuning error
occurs.)
Set the hysteresis of the set point for PID gain
tuning.
Control adjustment method
P control adjustment
PI control adjustment
PID control adjustment
PI control adjustment
PID control adjustment
PI control adjustment
PID control adjustment
P control adjustment
PI control adjustment
PID control adjustment
PI control adjustment
PID control adjustment
PI control adjustment
PID control adjustment
Description