156
(2) Heating-cooling control
The set value (SV) is set where the manipulated value for heating (MVh)/manipulated value for cooling (MVc) is
0%. Due to this, as long as the temperature process value (PV) and the set value (SV) is not in equilibrium at 0%
of manipulated value for heating (MVh)/manipulated value for cooling (MVc), an offset (remaining deviation)
generates. When an offset generates, the heating proportional band (Ph)/cooling proportional band (Pc) can be
manually shifted by the amount of the offset (remaining deviation).
Ex.
The temperature control module shifts the manipulated value for heating (MVh) by which the temperature
is stabilized at the set value (SV) from 0% to 80% when the manual reset function is used under the
following conditions.
• Control method: P control
• CH
Manual reset amount setting (address: 112H, 142H, 172H, 1A2H): 800 (80%)
(3) Setting method
Set a value in the following remote buffer memory area.
• CH
Manual reset amount setting (address: 112H, 142H, 172H, 1A2H) (
Manipulated value
for cooling (MVc)
Heating
Set value (SV)
Cooling
100%
80%
0%
-100%
Manipulated value
for heating (MVh)
Input range
Set values as follows:
Integral time (I): 0
Derivative time (D): 0
Overlap/dead band
Heating proportional
band (Ph)
Cooling proportional
band (Pc)
Manual reset
The manipulated
value for heating (MVh)
is shifted from 0 to 80%
to keep the temperature
stable at the set value (SV).
Manual reset range: -100.0 to 100.0% (unit: 0.1%)
(Set a value from -1000 to 1000)
(Percentage to the full scale)
(Percentage to the full scale)
Cooling: 100%
Cooling: 0%
Heating: 0%
Heating: 100%
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