Autonics Digipower 2000, Руководство пользователя

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6.Parametersettingandfunctions
38
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6.2.10 Proportionalandintegralconstantsetoffeedbackcontrol
Proportional integral control: This is the combination of proportional control and integral control.
Proportional control operates soft control without overshoot and hunting for the set value.
Integral control modifies offset automatically to reach the set value stably.
The optimal values of proportional constant and integral constant are set as factory defaults.
When changing proportional constant and integral constant, it may cause response delay in
feedback control or overshoot or hunting.
Proportional constant set[
P
], integral constant set [
I
] parameters are displayed when control
mode is static voltage, static current, static power mode in phase control.
(1)Proportionalconstantset[
P
]
It compensates error from the target value proportionally.
If proportional constant value is small, response is fast and it may cause overshoot or hunting. If
proportional constant value is big, response is slow.
• Set range: 0(0%) to 2000(100%)
(2)Integralconstantset[
I
]
It compensates cumulative error from the target value.
The set integral constant is the time when proportional value and integral value are equal.
If integral constant value is small, response is fast and it may cause overshoot or hunting.
If integral constant value is big, response is slow.
• Set range: 0.1 to 999.9 (unit: sec.)
6.2.11 Inputcorrection[
IN-B
]
It compensates the offset between actual input value and measured input value.
Actual input signal(%)
Input corrected signal(%)
Output
input signal
(%)
Actual input signal (%)
Input type is 4 to 20mA,
When 4mA is applied and the input monitor value displays 0.5%, set
IN-B
as
-0.5
and the input
monitor value displays as 0.0%.