44
F7.12 Proportional gain Kp Range
：
0.000
～
9.999
【
0.050
】
F7.13 Integral gain Ki
Range
：
0.000
～
9.999
【
0.050
】
F7.14 Sampling cycle Ts
Range
：
0.01
～
50.00s
【
0.50s
】
The bigger the proportional gain, the faster the response, but oscillation may
occur easily if proportional gain is too big.
If only proportional gain is used in regulation, the error cannot be eliminated
completely. Therefore, it is preferred to use the integral gain to form a PI
control system. The bigger the integral gain, the faster the response, but
oscillation may occur if integral gain is too big.
F7.14 refers to the sampling cycle of feedback value. The PI regulator
calculates once in each sampling cycle. The bigger the sampling cycle the
slower the response will.
F7.15 Error limit
Range
：
0.0
～
20
％【
2.0
％】
F7.15 is the max. error between system output and the close-loop reference, as
shown in Figure 6-40. PI regulator stops operation when the feedback error is
within this range. Setting this parameter correctly is helpful to improve the
system output accuracy and stability.
Figure 6-40 Error Limit Schematic Diagram
F7.16 Close-loop regulation
characteristics
Range
：
0
、
1
【
0
】
0
：
Positive logic
Set F7.16 to 0 if the motor speed is required to increase with the reference.
1
：
Negative logic
SetF7.16 to 1 if the motor speed is required to decrease with the increase of
the reference.
F7.17~F7.28 Reserved
Reserved
F7.29 PID feedback break
line detection
Range
：
0.0
～
80.0%
【
0.00%
】
F7.30 PID feedback break
Range
：
0.0
～
999.9s
【
0.00s
】
Error limit
Feedback value
Ref
Output
Freq.
Time
Time
