YOKOGAWA UT55A - 8.8 Performing Non-linear PID Control

8-103
IM 05P01C31-01EN
Control Functions
8.8 PerformingNon-linearPIDControl
Description
If a deviation (E) is smaller than the non-linear control gap width (GW), it is computed as
a proportional added the non-lenear control gain (GG).
Proportional
Band(CPB)
=ProportionalBand(P)/GG
*|E|≤GW/2
However,CPBislimitedby0.1to999.9%.
0%
100%
SP=EU(50%)
EU(100%)
EU(0%)
PV
PV
OUT
OUT
GW
Control output will change smoothly (i.e., without any bumps) when CPB switches.
Setting Details
Parameter
symbol
Name
Display
level
Setting range Menusymbol
GW Non-linear control gap width PRO
OFF,0.
0%+1digitto50.0%
ofPVinputrangespan
(EUS)
TUNE
GG Non-linear control gain PRO 0.001 to 1.000
Note1: In Cascade control, the LP2 lamp is lit while the Loop-2 parameter is displayed.
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