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Description of Function Codes
Protection upon load
P9-63
Detection level of load
P9-64
Detection time of load
P9-65
If protection upon load becoming 0 is enabled, when the output current of the AC drive is lower
than the detection level (P9-64) and the lasting time exceeds the detection time (P9-65), the output
frequency of the AC drive automatically declines to 7% of the rated frequency. During the
protection, the AC drive automatically accelerates to the set frequency if the load resumes to
normal.
Group PA: Process Control PID Function
PID control is a general process control method. By performing proportional, integral and
differential operations on the difference between the feedback signal and the target signal, it
adjusts the output frequency and constitutes a feedback system to stabilize the controlled counter
around the target value.
It is applied to process control such as flow control, pressure control and temperature control.
The following figure shows the principle block diagram of PID control.
Figure 5-26 Principle block diagram of PID control
Target
becoming 0
Setting Range
becoming 0
Setting Range
becoming 0
Setting Range
1
Ti
﹢
Ⓧ
Td*s+1
﹣
1
Default
0
1
Default
0.0%–100.0% (rated motor current)
Default
1
s
⊕
Feedback
150
PE6000 User Manual
0
Invalid
Decelerate
10.0%
1.0s
0.0s–60.0s
PID output
P
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