25
Cooling-side proportional band shift (Dead band/Overlap band)
(Option: Available for DUAL output only) (Setting range: -50.0 to +50.0)
[Description]
• This parameter is used for shifting the cooling-side pro-
portional band from the set value. (See the figure below.)
[Setting example] Shifting the cooling-side proportional band by 2.0
• Related parameter: (page 20)
• When is a positive value, it is called the "Dead band",
and when it is a negative value, the "Overlap band".
• Since the unit of is same one used for MV [%], if you
want to set in the unit of deviation [%], must be
converted using the equation below.
Output
Heating side
Cooling side
Overlap
band
Dead
band
MV
MV
MV=50%
Ex) When making a dead band with a deviation of
1.0 [%] from the SV while the proportional
band (P) is 5.0%:
DB [%] = 1.0 × = 20 [%]
100
5.0
100
P
DB [%] = Deviation × [%]
Consequently, set the parameter to 20 [%].
Press the key once. will be displayed and 2.0 will be registered for . After that, the
controller will operate with being 2.0 %.
Press and hold the key for three seconds.
will be displayed.
Press the or keys to flicker and to display .
(Repeat the procedure from 3 to 5 to check the set value.)
Press the key once.
The current setting ( ) will be displayed.
Press the key to display .
SEL
SEL
SEL
1.
4.
If you want to display the operation status, press and hold the key for two seconds.
The SV will be displayed on the display area.
If unoperated state continues, the PV will be displayed.
6.
2.
3.
SEL
5.
Display Operating procedure
PV indication
PV indication
SV indication
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