Azbil DCP31 - Page 128

7-18
Chapter 7. PARAMETER SETUP

D v -L
(3-position control deviation lower limit)

D v -H
(3-position control deviation upper limit)

H Y -L
(3-position control lower limit hysteresis)

H Y -H
(3-position control upper limit hysteresis)
In3-positioncontrol,controliscarriedoutinthefollowingthree
statesintheRUN,HOLD,FASTandENDmodes:
State Heat-side Output Cool-side Output MV
1 OFF (0.0 %) ON (100.0 %) 0.0 %
2 OFF (0.0 %) OFF (0.0 %) 50.0 %
3 ON (100.0 %) OFF (0.0 %) 100.0 %
Handling Precautions
• Even in 3-position control, output is time-proportional in the
READY mode. This is set in setup data
C 1 6
(MV (heat) in READY
mode) and
C 1 7
(MV (cool) in READY mode).
When connecting an actuator that may burn by time-propor-
tional output, set setup data
C 1 6
and
C 1 7
so that output in the
READY mode is 0 %.
SP
PV
OFF
ON
OFF
ON
Output (heat) Output (cool)
HY-L DV-L DV-H HY-H