Xinje VB5N Series User Manual

VB5N series inverter
75
The larger the proportion gain KP, the quicker the response. Too large value may lead to surge easily.
Deviation can not be eliminated through adjusting proportiaon gian KP, integral gain KI can be used to form PI control to
eliminate the deviation. The bigger the Ki, the quicker the response of changing deviation, but too big of the Ki may lead to
surge easily.
Sampling cycle T is the sampling cycle of feedback value. PI regulator calculates once in every sampling cycle, the longer
the cycle, the slower the response.
P7.13
Limit of deviation
Range: 0.0~20.0(%)
2.0(%)
The max deviation value of close-loop setting is shown in Fig.4-37, if the feedback value is in this range, PI regulator will stop adjusting.
This function is useful to improve accuracy and stability of the system.
Fig.4-37 Limit of deviation Fig.4-38 close-loop preset frequency running
P7.14
Close loop adjustment characteristic
Range: 0, 1
0
0: Positive. The motor speed increases with the increasing of setting value.
1: Negative. The motor speed decreases with the increasing of setting value.
Note: Define the relationship between setting value and speed.
P7.15
Integral adjustment selection
Range: 0, 1
0
0: Stop integral adjustment when the frequency reaches upper limit or lower limit.
1: Continue the integral adjustment when the frequency reaches upper limit or lower limit.
For the system need quick response, it is better to cancel the continue integral adjustment.
P7.16
Close-loop preset frequency
Range: 0~upper limit of frequency
0.00Hz
P7.17
Holding time of close-loop preset frequency
Range: 0.0~250.0s
0.1s
This function can make the close-loop adjustment enter stable status.
When inverter is in close-loop running mode, it accelerates to close-loop preset frequency P7.16 in acc time, and is running for a
while (P7.17), then runs according to close-loop features. Refer to Fig 4-38.
Note: If no need the function of close-loop preset frequency, please set the preset frequency and holding time to 0.
P7.18
Threshold of PI zero frequency wakeup
Range: 0.00~500.0Hz
0.01Hz
P7.19
Backlash of PI zero frequency wakeup
Range: 0.00~500.0Hz
0.01Hz
The two function parameters are used to set PI threshold and backlash of zero-frequency wakeup.
If you set the frequency to 0 Hz, PI threshold of zero-frequency wakeup will be disabled.
Output value
Preset frequency
Holding time of preset frequency
Limit of deviation
Time
Set value
Feedback value
Time
Output frequency
Time

Xinje VB5N Series Specifications

General

Brand	Xinje
Model	VB5N Series
Category	Inverter
Language	English