YOKOGAWA UT55A - Setting Valve Operation Mode; Adjusting Valve Position Automatically

10-30
IM 05P01C31-01EN
10.16.1 SettingValveOperationMode
Description
Position proportional control monitors the control output signals and the feedback signals
from the control valve and regulates to keep the valve opening and the control output
signal in agreement.
Position proportional control (output) operation mode has feedback type and estimating
type.
Setting Details
Parameter
symbol
Name
Display
level
Setting range Menusymbol
V.MOD
Valveadjusting
mode
STD
0:Valve
positionfeedbacktype
1:Valvepositionfeedbacktype
(moves to the estimating type if
a feedback input error or break
occurs.)
2:Valvepositionestimatingtype
OUT
10.16.2 AdjustingValvePositionAutomatically
Description
The fully-closed and fully-opened positions of a valve can be set automatically by the
feedback input signal from a valve.
The
followingdescribes
theprocedureofadjustingthevalvepositionautomatically.
(1) Verifythatthewiringsarecorrect.
(2) Set the operation mode to MAN.
(3) Settheautomaticvalvepositionadjustment(V.AT)toON.(V.ATblinksduringthe
automaticadjustment.)
(4) Whentheadjustmentiscompleted,V.ATreturnstoOFF.
 Whentheadjustmentfails,VAT.EappearsonPVdisplay.
Setting Details
Parameter
symbol
Name
Display
level
Setting range Menusymbol
V.AT
Automatic
valve position
adjustment
EASY
OFF:Stopautomatic
adjustment
ON:Startautomaticadjustment
OUT
10.16AdjustingMotor-operatedValvePosition(PositionProportionalOutput)