YOKOGAWA UP55A User Manual

7-20
IM 05P02C41-01EN
SwitchingattheInputSwitchingPVHighLimit(ParameterPV.2C=1)
This method automatically switches two inputs at switching point (input switching PV high
limit)
It should be selected in case where a sudden change in PV is allowed.
Control output will change smoothly (i.e., without any bumps) when PV switches.
Hysteresis (0.5% of PV range span) is provided around the switching point.
PV rising process
PV.HL
Input 2
(High-temperature side)
PV
Input 1
(Low-temperature side)
Time
Hysteresis
PV = Input 1 PV = Input 2
PV falling process
PV.HL
Input 2
(High-temperature side)
PV
Input 1
(Low-temperature side)
Time
Hysteresis
PV = Input 2 PV = Input 1
When input 1 < PV.HL – 0.5% of PV input range span, PV=Input1.
WhenPV.HL≤Input1,PV=Input2.
7.7SettingPVSwitchingMethodsofLoopControlwithPVSwitching

YOKOGAWA UP55A Specifications

General

Brand	YOKOGAWA
Model	UP55A
Category	Controller
Language	English