A-TS
58
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P7.14 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.
P7.14 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.
P7.15 Error limit
Range: 0.0
～
20
％【
2.0
％】
P7.15 is the max. error between system output and the close-loop
reference, as shown in Figure 7-15. 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 7-15 Error Limit Schematic Diagram
P7.16 Close-loop regulation characteristics
Range: 0, 1
【
0
】
0: Positive logic
Set P7.16 to 0 if the motor speed is required to increase with the
reference.
1: Negative logic
Error limit
Feedback value
Ref
Output
Freq.
Time
Time
