YOKOGAWA UP55A - Page 144

7-19
IM 05P02C41-01EN
Input (PV, Remote, and Auxiliary Analog) Functions
SwitchingwithintheTemperatureRange(High-temperatureside)(ParameterPV.2C=3)
This method automatically switches PV within the range of input switching PV high limit
and low limit.
It should be selected in case where a sudden change in PV must be avoided.
PV rising process
PV.HL
PV.LL
Input 2
(High-temperature side)
PV
Time
PV = Input 1 PV = Input 2During switching
Input 1
(Low-temperature side)
PV falling process
PV.HL
PV.LL
Input 2
(High-temperature side)
PV
Time
PV = Input 2 PV = Input 1During switching
Input 1
(Low-temperature side)
Wheninput2≤PV.LL,PV=Input1.
When PV.LL < Input 2 < PV.HL
1
Input 1
PV
–
+
Input 2
=
PV.HL – PV.LL
Input 2 – PV.LL
Input 2 – PV.LL
PV.HL – PV.LL
• •
WhenPV.HL≤Input2,PV=Input2.
7
7.7SettingPVSwitchingMethodsofLoopControlwithPVSwitching