108
FA - 10 PID differential clipping
0.00%
～
100.00%
【
0.10%
】
In PID regulator, the function of differentiation is relatively sensitive, which easily causes system oscillation.
The function of PID differentiation is limited to a small range.
FA - 11 PID given change time
0.00s
～
650.00s
【
0.00s
】
The given change time of PID refers to the time required for the given value of PID to change from 0.0 % to
100.0 %.
When the PID given value changes, the PID given value changes linearly according to the given change time,
thus reducing the occurrence of mutation in the given value adverse impact on the system
FA- 12 PID feedback filtering time
0.00s
～
60.00s
【
0.00s
】
FA - 13 PID output filtering time
0.00s
～
60.00s
【
0.00s
】
FA- 12 is used to filter the PID feedback quantity. The filter is helpful to reduce the influence of the feedback
quantity being interfered, but it will bring about a decrease in the response performance of the process closed loop
system.
FA- 13 is used to filter the PID output frequency. This filter will weaken the abrupt change of the frequency
inverter output frequency, but it will also bring about a decrease in the response performance of the process closed
loop system.
FA-15 Proportional gain kp2
0.0
～
100.0
【
20.0
】
FA-16 Integration time Ti2
0.01s
～
10.00s
【
2.00S
】
FA-17 Differential time Td2
0.00
～
10.000
【
0.000s
】
In some applications, a group of PID parameters cannot meet the requirements of the whole operation process,
and different PID parameters need to be adopted in different situations.
The above function code is used for switching the two groups of PID parameters. The setting mode of regulator
parameters FA - 15 ~ FA - 17 is similar to parameters FA - 05 ~ FA - 07.
FA - 18 PID parameter switching conditions
0
～
3
【
0
】
0: do not switch, only use the first group of PID (FA - 05 ~ FA - 07) parameters.
1: switch through X terminal. Multi-function X terminal function selection to be set to 43 (PID parameter switching
terminal), when the terminal is invalid, select the parameter
Group 1 (FA - 05 ~ FA - 07), select parameter group 2 (FA - 15 ~ FA - 17) when the terminal is active
2: switch automatically according to deviation.
Given the absolute value of deviation from feedback is less than PID parameter switching deviation 1 (FA - 19),
PID parameter selection parameter group 1.
Given that the absolute value of the deviation from the feedback is greater than PID switching deviation 2 (FA -
20), PID parameter selection selects parameter group 2.
Given that the deviation from feedback is between switching deviation 1 and switching deviation 2, the PID
parameters are linear interpolation values of two sets of PID parameters, as shown in figure 5 - 28.
