User Manual
EM303B General Purpose Inverter
116
No.
Function
Range
Unit Default Type
F4-30
PID Feedback Loss Detection Value 0.0~PID maximum scale
0.0
〇
F4-31
PID Feedback Loss Detection Time 0.0~6000.0
S
6000.0
〇
F4-30 and F4-31 are for judging whether PID feedback is lost or not.
If PID feedback<PID feedback loss detection value F4-30(Because of AD sampling accuracy,
please do not set F4-30=0.1 or 0.2), and lasting time> PID feedback loss detection time
(F4
-
31), inverter trips EST (PID feedback loss) and will take the corrective action based on
selected troubleshooting.
8.6
F5 Group: General Parameters of Vector Control
No.
Function
Range
Unit Default Type
F5-00
Speed Proportional Gain
ASR_P1
0.00
~
100.00
%
15.00
●
F5-01
Speed Integral Time
ASR_Ti1
0.00
~
30.00
0.00: No integration
S
0.50
●
F5-02
Speed Differential Time
ASR_Td1
0.00
~
10.00
mS
0.00
●
F5-03
Speed Proportional Gain
ASR_P2
0.00
~
100.00
%
12.00
●
F5-04
Speed IntegralTime
ASR_Ti2
0.00
~
30.00
0.00: No integration
S
0.50
●
F5-05
Switching Frequency 0
0.00
~
Switching Frequency 1
Hz
5.00
〇
F5-06
Switching Frequency 1
Switching Frequency 0
~
Fmax
Hz
10.00
〇
In SVC1, inverter adjusts the speed dynamic
response of vector control through regulating speed
proportional gain, speed integral time and speed
differential time of speed PID regulator. The
dynamic response of speed loop can be accelerated
by increasing speed proportion gain, shortening
speed integration time or prolonging speed
differentiation time. However, if speed proportional
gain is too big, speed integral time is too little, or
speed differential time is too much, all of which will
result in big system overshoot so that oscillation
occurs.
PID
Parameters
Switching Freq. 0
P1,Ti1,Td1
P2,Ti2,Td1
Motor Speed
Switching Freq. 1
Figure7-17
Illustration of PID parameters
User should adjust above speed PID parameters according to the real load features. Usually,
on the premise of no system oscillation, proportional gain can be increased as much as
possible, and then adjust integral time and differential time to enable the system to have
quick response with small overshoot.
To ensure system quick dynamic response at both low speed and high speed, PID regulation
needs to be conducted at low speed and high speed respectively. If it is below switching