ACD320 user manual
Parameter Description
2: A VI+ACI Feedback
3: Communication
feedback
4: AVI-ACI Feedback
The PID feedback channel is chosen by this parameter.
Important: The assignment channel and feedback channel can not be in coincidence,
otherwise PID is unable to control effectively.
Function Code
Name
Setting Range
Default
Value
PID Output Characteristics
0: positive
F4.21
0
Option
1: negative
PID output is positive characteristic:when the feedback signal is bigger than the PID given
signal, it is required for the inverter output frequency to decrease to counterbalance the PID, for
instance, the winding tension PID control.
PID output is negative characteristic:when the feedback signal is bigger than the PID giver
signal, it is required for the inverter output frequency to increase to counterbalance the PID,for
instance, the unreeling tension PIDcontrol.
Function Code
Name
Setting Range
Default
Value
F4.22
Proportional gain (Kp)
0.00～100.00
1.00
F4.23
Integral time (Ti)
0.01～10.00s
0.10s
F4.24
Differential time (Td)
0.00～10.00s
0.00s
Proportional gain (Kp): determines the adjusting strength of PIDadjustor. The bigger the P,
the bigger the adjusting strength is. This parameter being 100 means that when the difference
between the PID feedback value and the assigned value is 100%, the adjusting range of PID
adjustor to the output frequency command is the maximum frequency (ignore integral action and
derivative action).
Integrating time (Ti): determines the speed at which PIDadjustor performs integral
regulation to the discrepancy between the PID feedback value and the assigned value. The Ti is
indicating the period of time that integral controller (ignore proportional action and derivative
action), when the discrepancy between the PID feedback value and the assigned value is 100%,
continuously regulates to make the regulating amount to reach the maximumfrequency (F0.047).
The shorter the integrating time, the stronger the adjusting strength is.
Differential time (Td): determines the controlling strength at which PID adjustor performs
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