6 Programming Features
161
3. When using an analog signal (0 to 10 V/4 to 20 mA) input to the CN2
terminal of the JVOP-140 Digital Operator as the target or feedback
value of PID control, do not use it as a multi-function analog input.
Constant n077 (Multi-function Analog Input Function) must be set to
0 (disabled in this case).
Proportional Gain (P), Integral Time (I), Derivative Time (D)
(n130, n131, n132)
Adjust the response of the PID control with the proportional gain (P),
integral time (I), and derivative time (D).
Optimize the responsiveness by adjusting the constants while operat-
ing an actual load (mechanical system). Any control (P, I, or D) that
is set to zero will not operate.
Upper Limit of Integral (I) Values (n134)
Constant n134 prevents the calculated value of integral control from
exceeding a specific amount. There is normally no need to change the
setting.
Reduce the setting if there is a risk of load damage, or of the motor
going out of step by the Inverter’s response when the load suddenly
changes. If the setting is reduced too much, the target value and the
feedback value will not match.
Set this constant as a percentage of the maximum output frequency with
the maximum frequency as 100%.
Constant
No.
Name Unit Setting
Range
Factory
Setting
n130 Proportional Gain (P) 0.1 0.0 to 25.0 1.0
n131 Integral Time (I) 0.1 s 0.0 to 360.0 1.0
n132 Derivative Time (D) 0.01 s 0.00 to 2.50 0.00
Constant
No.
Name Unit Setting
Range
Factory
Setting
n134 Upper Limit of Integral Values 1 % 0 to 100 100
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