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7-13
Chapter 7. PARAMETER SETUP
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dv-L (3-position control deviation lower limit)
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dv-H (3-position control deviation upper limit)
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HY-L (3-position control lower limit hysteresis)
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HY-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.
Handling Precautions
Even in 3-position control, output is time-proportional in the READY
mode when setup data
C44 setting is 0. This is set in setup data C16
(MV (heat) in READY mode) and
C17 (MV (cool) in READY mode).
Output is time-proportional output when setup data
C44 setting is 1.
This is set to setup data
C39 (MV2 (heat) in READY mode) and C40
(MV2 (cool) in READY mode).
When connecting an actuator that may burn by time-proportional
output, set setup data
C16 and C17 or C39 and C40 so that output in
the READY mode is 0%.
State
Heat-side
Cool-side
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%
OFF
HY-L
SP
ON
ON
OFF
PV
dv-L
dv-H
HY-H
Output (heat)
Output (cool)