18
[Description]
• Cooling side proportional band can
be shifted for set value (SV) (see
diagram (a) below).
• When the value of db is positive, it
is called the dead band, and when
the value is negative, it is called the
overlap band.
• The value of db is set in MV (%).
When it is set in deviation (%), it
can be converted from the follow-
ing equation and set.
Example) Altering dead band/overlap band of 0% to 1.0%
(dead band)
Key operation
Description
Press the SEL key to display P.
Press the SEL key repeatedly until
is displayed.
Press the or key to display
1.0.
Press the DATA key once.
Current data (0%) is displayed.
Press the SV key when you need to
display the operation status display.
After pressing the ENT key, the
shift value of the cooling side
proportional band is registered.
Operation will be started with 1.0%.
Display
SEL
ENT
SV
DATA
SEL
Shift of cooling side proportional band
(dead band/overlap band) (DUAL type only)
(Setting range: -50.0 to +50.0%)
(a)
Output
Setting (SV)
Heating side
Cooling side
Deviation
(–)
Deviation
(+)
Overlap
band
Dead
band
Example) When proportional band
(P) = 5.0% and dead band
for SV is set at deviation
1.0 (%), the following
equation is used for setting
this parameter to 20%.
Related parameter: P (Page 6)
100
P
DB (%) = Deviation
×
(%)
100
5.0
DB (%) = 1.0
×
= 20 (%)
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