Parameter Description VD120 Series Inverter User Manual
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116
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FA-11
PID Given Change Time
0.00s~650.00s
0.00s
○
PID given changes time, refers to the PID given value time needed from 0.0% to 100.0%.
When PID given changes, PID given value according to the given time linear changes, reduce
adverse effects caused by given mutations on the system.
FA-12
PID Feedback Filter Time
0.00s~60.00s
0.00s
○
FA-13
PID Output Filter Time
0.00s~60.00s
0.00s
○
FA-12 used to filter the PID feedback, which can reduce the influence of feedback, but leads to the
response performance of the process closed-loop system.
FA-13 used to filter the PID output frequency, the filter will weaken the mutation the of inverter output
frequency, but also leads to the response performance of the process closed-loop system.
FA-15
Proportion Gain Kp2
0.0~100.0
20.0
○
FA-16
Integral Time Ti2
0.01s~10.00s
2.00s
○
FA-17
Differential Time Td2
0.000s~10.000s
0.000s
○
FA-18
PID Parameters
Switching Condition
0: No switching
1: Switching through DI terminal
2: Automatic switching according to the
deviation
0
○
FA-19
PID Parameters
Switching Deviation 1
0.0%~FA-20
20.0%
○
FA-20
PID Parameters
Switching Deviation 2
FA-19~100.0%
80.0%
○
In some applications, a set of PID parameters can not meet the needs of the whole operation process,
need to adopt different PID parameters under different conditions.
This set of function is used to switch between two groups of PID parameters.The set mode of
controller parameters FA-15-FA-17 is similar with parameter FA-05~FA-07.
Two groups of PID parameters can be switch by multi-functional digital DI terminal, can also
according to the deviation of PID automatic switching.
Selection for the multi-function DI terminal switch, the multi-function terminal selection is set to 34
(PID parameter switch terminal), when the terminal is invalid selecting parameters group 1 (FA-05 -
FA-07), when terminal is valid selecting parameters group 2 (FA-15-FA-17).
Selection for automatical switching, when the absolute value of the deviation between the given and
feedback is less than PID parameter switch deviation 1 FA-19, PID parameters selection parameter
group 1. When the absolute value of deviation between given and feedback is greater than PID
parameter switch deviation 2 FA-20, PID parameters selection parameter group 2. When the
deviation between the given and feedback is between switch deviation 1 and 2, the PID parameter is
a linear interpolation of twp set of PID parameter, as shown in the figure below.
Fig 6-18 Schematic diagram for PID parameters automatically switchover
Summary of Contents for VD120 Series
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