YOKOGAWA UP55A - Setting Hysteresis and Dead Band for HeatingCooling Control Output

10-13
IM 05P02C41-01EN
Output (Control and Retransmission) Functions
10.9 SettingHysteresisandDeadBandforHeating/
coolingControlOutput
Description
InHeating/coolingcontrol,thepositivedeadbanddenotesthezonewherenoneofthe
heating-side and cooling-side outputs are presented. The negative dead band denotes
thezonewherebothoftheheating-sideandcooling-sideoutputsarepresented.
The following shows the case when both the heating side and cooling side are ON/OFF
control.
ON
ON
50%
Cooling-side hysteresis (HYSc)
Neutral (OFF)
Heating-side hysteresis (HYS)
Positive dead band
The following shows the case when both the heating side and cooling side are PID
control.
0
Negative dead band
0
Cooling-side
output
Cooling-side
output
Heating-side
output
Heating-side
output
Output (%)
100
Output (%)
100
Positive dead band
100(%)
100(%)
50
50
0
0
Value of control output before split into
heating- and cooling-side outputs
Value of control output before split into
heating- and cooling-side outputs
10