16
[Description]
• This setting is required only for
DUAL type.
• When contact output or SSR drive
output type is used, the output turns
ON/OFF at a constant cycle when
the input is within the proportional
band.
This cycle is called the proportional
cycle.
The output value is expressed by the
ratio of which the output turns ON
within the time of proportional
cycle.
As the time of proportional cycle
becomes short, control can be made
more accurately, but it reduces the
life of operation terminal unit, so it
needs to be set in consideration of
the life of operation terminal unit.
• In the case of current output, this
parameter is not displayed.
The following shows the standard pro-
portional cycles.
SSR, SSC :
Proportional cycle, 1 to 2 sec.
Contact output :
Proportional cycle, 20 to 30 sec.
Example) Altering cooling control proportional cycle of
30 seconds to 20 seconds
Key operation Description
Press the SEL key to display P.
Press the SEL key repeatedly until
is displayed.
Press the or key to display
20.
Press the DATA key once.
Current data (30 seconds) is
displayed.
Press the SV key when you need to
display the operation status display.
After pressing the ENT key, the
proportional cycle value of the
control output 2 is registered.
Operation is started with 20 seconds
of cycle.
Display
SEL
ENT
SV
SEL
SEL
Cooling side proportional cycle of control output 2
(DUAL type only) (Setting range: 1 to 150 sec.)
Output ON
Proportional cycle
Proportional cycle
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