28
Cooling-side proportional band coefficient (Option: Available for DUAL output only) (Setting range: 0.0 to 100.0)
[Description]
• This parameter is used for setting the cooling-side pro-
portional band. (See the figure below.)
[Setting example] Changing the cooling-side proportional band coefficient from 1.0 to 2.5
Press and hold the
SEL
key for three seconds.
will be displayed on the PV display.
Press the
key to display
.
Press the
SEL
key once.
The current setting ( ) flashes on the SV display.
Press the
or
keys to display
.
Press the
SEL
key once.
will stop flashing and will be registered for
. After that, the
controller will operate with the cooling-side proportional band coefficient being 2.5.
If you want to display the operation status, press and hold the
SEL
key for two seconds.
Operating procedure
Display
1.
2.
3.
4.
5.
6.
• Before setting the cooling-side proportional band, set the
heating-side proportional band to an optimum value. To
select the two-position control for the cooling side, set
to 0.0.
Output
Heating side
Cooling side
Heating-side
proportional
band
Cooling-side
proportional
band
Proportional band (P)
50
MV
Coefficient: 0.5
Coefficient: 1.0
Coefficient: 2.0
• When is set to 0.0 and
is set to 0.0 in the dual
output type, the cooling output is as shown in the figure
below. The hysteresis is fixed at 0.5%FS.
Cooling-side
proportional band
=
Proportional band (P)
2
×
Coefficient
Ex) When making the proportional band of 10% of the
full scale with the proportional band (P) being 50%:
10% =
×
Coefficient
50%
2
Consequently, the coefficient is 0.4.
Related parameters:
(page 27)
(page 24)
(page 29)
Heating output (Output 1)
ON 0.5%
0.5% ON
OFF
OFF
Cooling output (Output 2)
HYS
DB
SV
PV
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