Mitsubishi Electric FR-F820-00046, Инструкция по эксплуатации

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(A) Application parameters Parameters
5 - 376
●
From the vibration amplitude (Xc) and the vibration cycle (Tc), the threshold sensitivity (Ku) and
the threshold cycle (Tu) are calculated.
●
Each constant is calculated using a formula depending on the Pr. 1218 setting, and PID gain tuning
is finished.
●
After the integral term is cleared, PID control is performed with the constant to which the change
has been applied (the constant used before PID gain tuning when a fault occurs).
PID gain tuning operation setting (Pr. 1218)
Set the PID gain tuning operation in this parameter. The digit in the hundreds place represents the tar-
get PID loop. The digit in the tens place represents the tuning method. The digit in the ones place rep-
resents the control adjustment method.
NOTES 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.
Pr.1218 setting value Target PID Tuning method Control adjustment method
0 (initial value) PID gain tuning function disabled
100
First PID
Step response method
P control adjustment
101 PI control adjustment
102 PID control adjustment
111
Limit cycle method (set-point
control)
PI control adjustment
112 PID control adjustment
121
Limit cycle method (follow-up
control)
PI control adjustment
122 PID control adjustment
200
Second PID
Step response method
P control adjustment
201 PI control adjustment
202 PID control adjustment
211
Limit cycle method (set-point
control)
PI control adjustment
212 PID control adjustment
221
Limit cycle method (follow-up
control)
PI control adjustment
222 PID control adjustment
Tab. 5-181: Settings of Pr. 1218