YOKOGAWA UT55A User Manual

8-90
IM 05P01C31-01EN
8.4.2 SwitchingPIDAccordingtoPV
Description
ThePIDswitchingaccordingtoPVisafunctionthatswitchesbetweenthegroupsofPID
parametersaccordingto
thePV.
The maximum number of PID groups to be switched is 8. (Set RP1 to RP7.)
This function is useful for reactors in which the chemical reaction gain changes
depending on the temperature.
Thefigurebelow
showsanexampleofdividingthePVinputrangefromthemaximum
valuetotheminimumvalueintosevenzonesbyreferencepoints1to6.(Set RP1 to
RP6.)
PID of group 1
Minimum value of PV input range
Maximum value of PV input range
Reference point 1
Reference point 2
Reference point 3
Reference point 4
Reference point 5
Reference point 6
PID of group 2
PID of group 3
PID of group 4
PID of group 5
PID of group 6
PID of group 7
Change in PV
If the PV is currently positioned at this point,
control is based on the PID of group 6.
ThePVinputrangecanbedividedintothenumberofzonesthatissetinthereference
point.
Hysteresisatthe
timeofzoneswitchcanbeset.
► SetpointPD:8.4.6SettingHysteresisatTimeofZoneSwitch
Reference deviation can be set at the same time.
► Reference deviation: 8.4.5 Switching PID according to Deviation (Reference Deviation)
8.4SwitchingPID

YOKOGAWA UT55A Specifications

General

Brand	YOKOGAWA
Model	UT55A
Category	Temperature Controller
Language	English