6
Setting of proportional band (Setting range: 0 to 999.9%
for input range)
[Description]
• Proportional band can be set auto-
matically by auto-tuning.
• Manual setting is also possible. If
P value is too small, control action
becomes unstable, and if it is too
large, the response becomes slow.
• When P is set to 0.0, 2-position ac-
tion becomes effective.
The hysteresis under 2-position ac-
tion should be set with the param-
eter HYS.
• When dual output type is used and
it is set to P = 0.0 and COOL = 0.0,
the heating and cooling outputs are
as shown in the following diagram.
In this case, the hysteresis is fixed
at 0.5%.
Related parameter: HYS (Page 12)
Example) Altering proportional band 10.0% to 15.0%
ON ON
Heating output
(output 1)
Cooling output
(output 2)
OFF OFF PV
SV
HYS DB
0.5% 0.5%
Key operation Description
Press the SEL key to display P.
Press the DATA key once.
Current proportional band (10.0%)
is diplayed.
Press the or key to display
15.0.
Press the ENT key, then proportional
band is registered.
Operation is started with 15.0% pro-
portional band.
Hold down the key for 3 seconds to
display the operation status.
Display
SEL
ENT
SV
DATA
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