YOKOGAWA UP35A, User Manual

Page: 214 / 412

10-13
IM 05P02D41-01EN
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