7-20
IM 05P01C31-01EN
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 1
PV = Input 2
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
Summary of Contents for UTAdvanced UT55A
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