Mitsubishi Electric FR-F820-00046 Instruction Manual page 421

Fr-f800 series
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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

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