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(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.
When using the manual reset function in the following conditions
• Control method: P control
•CH Manual reset amount setting (Un\G724, Un\G740, Un\G756, Un\G772): 800 (80%)
The Q64TCN shifts the manipulated value for heating (MVh) by which the temperature is stabilized at the
set value (SV) from 0% to 80%.
(3) Setting method
Set a value in the following buffer memory area.
•CH Manual reset amount setting (Un\G724, Un\G740, Un\G756, Un\G772) ( Page 152, Section 3.4.2
(75))
Manipulated value
for cooling (MVc)
Heating
Set value (SV)
Cooling
100%
80%
0%
-100%
Manipulated value
for heating (MVh)
Input range
Configure the settings
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)
can be moved from 0%
to 80% to keep
the set value (SV) stable.
Manual reset range: -100.0 to 100.0% (every 0.1%)
(Set -1000 to 1000)
(Percentage to the full scale) (Percentage to the full scale)
Cooling: 100%
Cooling: 0%
Heating: 0%
Heating: 100%