YOKOGAWA UT55A - 7.6 Adjusting PV Range for Loop Control

7-17
IM 05P01C31-01EN
Input(PV,Remote,andAuxiliaryAnalog)Functions
7.6 AdjustingPVRangeforLoopControlwithPV
SwitchingorLoopControlwithPVAuto-selector
Description
LoopcontrolwithPVswitchingandLoopcontrolwithPVauto-selectorneedtodetermine
thePVrange
forcontrolifthemeasurementrangesoftwoinputsignalsaredifferent.
ThefigurebelowisanexampleofsettingPVinputrangeof0to200ºC,RSPterminal
inputof100to800ºC,andcontrolPVrangeof0to800ºC.
► BlockdiagramofLoopcontrolwithPVswitching:8.1.6LoopControlwithPVSwitching,
Heating/coolingLoopControlwithPVSwitching,andPositionProportionalLoopControlwithPV
Switching
(RL or SL)
0 100 200 800ºC
(SL or RL)
(P.RL) (P.RH)
Two input ranges
Control PV range
PV input range to be controlled
(SH or RH)
(RH or SH)
PV input
RSP input
Group display: E1
Setting Details
Parameter
symbol
Name
Display
level
Setting range Menusymbol
P.UNI ControlPVinputunit STD
-: No unit
C: Degree Celsius
-: No unit
- -: No unit
- - -: No unit
F: Degree Fahrenheit
MPV
P.DP
ControlPVinput
decimal point position
STD
0: No decimal place
1: One decimal place
2: Two decimal places
3: Three decimal places
4: Four decimal places
P.RH
Maximum value of
controlPVinput
range
STD
-19999 to 30000,
(P.RL<P.RH),
|P.RH
-P.RL|≤30000
P.RL
Minimum value of
controlPVinput
range
STD
Note1:Settheinputrangesfortwoinputsconsecutively.SetthecontrolPVranges(P.RL,P.RH)
within the actual input range.
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