Inovance MD330H - Page 211

Description of Function Codes
MD380 User Manual
- 210 -
Function Code Parameter Name Setting Range Default
FA-12 PID feedback lter time 0.00–60.00s 0.00s
FA-13 PID output lter time 0.00–60.00s 0.00s
FA-12 is used to lter the PID feedback, helping to reduce interference on the feedback but
slowing the response of the process closed-loop system.
FA-13 is used to lter the PID output frequency, helping to weaken sudden change of the AC
drive output frequency but slowing the response of the process closed-loop system.
Function Code Parameter Name Setting Range Default
FA-15 Proportional gain Kp2 0.0–100.0 20.0
FA-16 Integral time Ti2 0.01–10.00s 2.00s
FA-17 Differential time Td2 0.000–10.000s 0.000s
FA-18
PID parameter switchover
condition
0: No switchover
1: Switchover via DI
2: Automatic switchover
based on deviation
0
FA-19
PID parameter switchover
deviation 1
0.0% to FA-20 20.0%
FA-20
PID parameter switchover
deviation 2
FA-19 to 100.0% 80.0%
In some applications, PID parameters switchover is required when one group of PID
parameters cannot satisfy the requirement of the whole running process.
These parameters are used for switchover between two groups of PID parameters.
Regulator parameters FA-15 to FA-17 are set in the same way as FA-05 to FA-07.
The switchover can be implemented either via a DI terminal or automatically implemented
based on the deviation.
If you select switchover via a DI terminal, the DI must be allocated with function 43 "PID
parameter switchover". If the DI is OFF, group 1 (FA-05 to FA-07) is selected. If the DI is
ON, group 2 (FA-15 to FA-17) is selected.
If you select automatic switchover, when the absolute value of the deviation between PID
feedback and PID setting is smaller than the value of FA-19, group 1 is selected. When the
absolute value of the deviation between PID feedback and PID setting is higher than the
value of FA-20, group 2 is selected. When the deviation is between FA-19 and FA-20, the
PID parameters are the linear interpolated value of the two groups of parameter values.