YOKOGAWA UT55A - 10.9 Setting Hysteresis and Dead Band for Heating;cooling Control Output

10-13
IM 05P01C31-01EN
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