Operating Instructions

Descriptions of Parameter Settings
Descriptions of Parameter Settings
208 | 443
Pr.
Explanation
Settings
Default
08-29
Frequency base corresponding to
100.00% PID
0: PID control output 100.00% corresponding to maximum operation
frequency (Pr.01-00)
1: PID control output 100.00% corresponding to the input value of the
auxiliary frequency
0
Valid only when you enable the master and auxiliary frequency functions.
When Pr.08-29 = 0, PID control outputs 100.00% corresponding to the maximum operation frequency. When Pr.08-
29 = 1, PID control outputs 100.00% corresponding to the auxiliary frequency. (The PID output frequency changes
when the auxiliary frequency command changes.)
Pr.
Explanation
Settings
Default
08-31
Proportional gain 2
0.0 to 1000.0 (when Pr.08-23 setting bit1=0)
0.00 to 100.00 (when Pr.08-23 setting bit1=1)
1.00
08-32
Integral time 2
0.00 to 100.00 sec.
1.00
08-33
Differential time 2
0.00 to 1.00 sec.
0.00
08-65
PID target value source
0: Frequency command (Pr.00-20, Pr.00-30)
1: Pr.08-66 setting
2: RS-485 communication input
3: External analog input (refer to Pr.03-00, Pr.03-01)
4: CANopen communication card
6: Communication card (does not include CANopen card)
7: Digital keypad potentiometer knob
0
Selects the target value source for the PID controller.
When Pr.08-65=0, the maximum operating frequency Pr.01-00 is 60 Hz, the error is 100%, and Pr.08-01=1.00,
then the output frequency is '‟1” times the Pr.01-00 maximum operating frequency. Therefore, the output frequency
= 60 * 100% * 1=60 Hz.
Calculation formula:
Output frequency=Fmax (Pr.01-00) * error% ((PID reference value (Pr.00-20 / Pr.00-30) – PID feedback (Pr.08-00))
* Pr.08-01.
When Pr.08-65≠0, the internal calculation of the proportional gain reduces by 100 times, that is, when Pr.01-00
Fmax=60 Hz, error=100%, Pr.08-01=1.00, then the output frequency is ‟0.01” times the Pr.01-00 Fmax. Therefore,
the output frequency=60 * 100% * 0.01=0.6 Hz.
Calculation formula:
Output frequency=Fmax (Pr.01-00) * error% ((PID reference value (Pr.08-66) – PID feedback value (Pr.08-00)) *
Pr.08-01 * 0.01.
When Pr.08-65=0, the PID controller architecture shows as the diagram below: