Mitsubishi Electric FR-F820-00046, Instruction Manual

Page: 545 / 940

Parameters (A) Application parameters
FR-F800 5 - 373
5.11.6 PID gain tuning
Changing the PID control manipulated amount and measuring the PID control response enable au-
tomatic setting of the constant optimal for PID control.
For tuning, use the step response method or the limit cycle method.
Parameters referred to
Pr. 59 Remote function selection => page 5-111
Pr. 73 Analog input selection => page 5-255
Pr. 79 Operation mode selection => page 5-119
Pr. 178 to Pr. 189 (input terminal function selection) => page 5-285
Pr. 190 to Pr. 196 (output terminal function selection) => page 5-231
Pr. 290 Monitor negative output selection => page 5-211
C2 (Pr. 902) to
C7 (Pr. 905)
Frequency setting voltage (current) bias/gain => page 5-266
Pr. Name
Initial
value
Setting range Description
1211
A690
PID gain tuning timeout
time
100 s 1 to 9999 s
Set the time after the PID gain tuning starts until a
timeout error occurs.
1212
A691
Step manipulated amount 1000% 900 to 1100%
Set the step manipulated amount when using the
step response method to perform the PID gain
tuning.
1213
A692
Step response sampling
cycle
1 s 0.01 to 600 s
Set the cycle for sampling of measurement values
when using the step response method to perform
the PID gain tuning.
1214
A693
Timeout time after the
maximum slope
10 s 1 to 9999 s
Set the time after the measurement of the maximum
slope until the completion of the tuning when using
the step response method to perform the PID gain
tuning.
1215
A694
Limit cycle output upper
limit
1100% 900 to 1100%
Set the upper limit value of the two-position output
when using the limit cycle method to perform the
PID gain tuning.
1216
A695
Limit cycle output lower
limit
1000% 900 to 1100%
Set the lower limit value of the two-position output
when using the limit cycle method to perform the
PID gain tuning.
1217
A696
Limit cycle hysteresis 1% 0.1 to 10%
Set the hysteresis of the set point when using the
limit cycle method to perform the PID gain tuning.
1218
A697
PID gain tuning setting 0
0, 100 to 102,
111, 112, 121,
122, 200 to
202, 211, 212,
221, 222
Select the target loop, method, and control
adjustment method for the PID gain tuning.
1219
A698
PID gain tuning start/
status
0
0 PID gain tuning function disabled
1 PID gain tuning start
2 During PID gain tuning (read only)
8 PID gain tuning forced end
9, 90 to 96 Tuning error (read only)