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Function
Name
Code
PID Output
b02.02
Characteristics
Proportional
b02.03
Gain (KP)
Integral
b02.04
Coefficient (KI)
Derivative
Coefficient
b02.05
(KD)
Sampling cycle
b02.06
(T)
PID Control
b02.07
Bias Limit
Factory
Setting Range
Setting
0~1
0.00~100.00 2.50
0.00~10.00
1.00
0.00~10.00
0.00
0.01~100s
0.10s
0.0~100%
0.0%
Set
point
Figure 5.2 PID control curve Corresponding
S y s t e m
of Max. Limit and Output Frequency.
Properly set the value so as toregulate the
accuracy and stability of PID system.
4 11
0
0:Water Supply
Determining the strength of PID
regulation, KP is bigger, regulation is
stronger but fluctuates easily
Bias between the feedback and the
given, determining the speed of
regulation. If K1 is bigger, regulation
is stronger
Variable ratio between the feedback
and the given, KD is bigger,
regulation is stronger. Be cautious
use, for differential regulation
amplifies interference of system
Calculating time of regulator, when
increased response sluggishly
Max. bias of PID output value
corresponding to closed loop given
value
Feedback
Description
1:Pumping
Bias Limit
(PID stops
regulating)
t
t
D i a g r a m
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