ACD320 user manual Parameter Description
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Fig.6-17 Frequency Reaching Detection Range Diagram
Function Code Name Setting Range
Default
Value
F4.16
Brake Threshold Value
Voltage
115.0～140.0% ( standard
DC bus voltage) 380V
130.0%
115.0 ～ 140.0%( standard
DC bus voltage) 220V
120.0%
This function is to set up the initiative bus voltage of dynamic braking, and properly
regulating this value can result in an effective brake to the load.
Function Code Name Setting Range
Default
Value
F4.17 Speed display ratio
0.1～999.9%
Speed=120 × running
frequency × F4.17/pole
number
100.0%
Speed=120×running frequency ×F4.17/pole number
This function is used to calibrate speed display error, it has no impact on actual speed.
PID control is one method normally used to process control, holding the control value to the
target value by the negative feedback systemwhich regulates the inverter output frequency by
means of proportion, integration and differential operations on the difference between the control
value feedback signal and the target value signal. It is applicable to the process controls such as
flow control, pressure control and temperature control and so on. The control functional block
diagramis shown as follows:
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