TD20 Series VFD Function Parameters
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Detailed instruction of parameters
5–7: Reserved
Note: The reference channel and the feedback channel
can not coincide, otherwise, PID can not control
effectively.
0: PID output is positive: when the feedback signal
exceeds the PID reference value, the output frequency
of the VFD will decrease to balance the PID. For
example, the strain PID control during wrapup
1: PID output is negative: When the feedback signal is
stronger than the PID reference value, the output
frequency of the VFD will increase to balance the PID.
For example, the strain PID control during wrapdown
The function is applied to the proportional gain P of PID
input.
P determines the strength of the whole PID adjuster.
The parameter of 100 means that when the offset of PID
feedback and given value is 100%, the adjusting range
of PID adjustor is the Max. frequency (ignoring integral
function and differential function).
The setting range:0.00–100.00
This parameter determines the speed of PID adjustor to
carry out integral adjustment on the deviation of PID
feedback and reference.
When the deviation of PID feedback and reference is
100%, the integral adjustor works continuously after the
time (ignoring the proportional effect and differential
effect) to achieve the Max. Frequency (P00.03) or the
Max. Voltage (P04.31). Shorter the integral time,
stronger is the adjustment
Setting range: 0.00–10.00s
This parameter determines the strength of the change
ratio when PID adjustor carries out integral adjustment
on the deviation of PID feedback and reference.
If the PID feedback changes 100% during the time, the
adjustment of integral adjustor (ignoring the proportional
effect and differential effect) is the Max. Frequency
(P00.03) or the Max. Voltage (P04.31). Longer the
integral time, stronger is the adjusting.
Setting range: 0.00–10.00s
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