RAMP FUNCTION
It is a rate of set value to arrive to set value
according to setting temperature and time.
ex)Present temp. 20
, set value 100 , 20
per min.
Initial uprising set value(up,rt) : 100
Unit time : Minute (min)
100
Time/Min
1234
80
60
40
Present
temp 20
23
FUNCTION
11
ZOOM FUNCTION
When you choose Zoom function ON in Group
control, you can see a temperature with
zooming as soon as you select ON. The
temperature will be in the center of paper.
ex) Scale : 0.0 ~ 100.0
Zoom ON : ZOOM IN PV : 25.5 at the
center
AUTO TUNING
STANDARD TYPE AUTO-TUNING
Temperature
Set point
value (SV)
Process
value (PV)
Control
output
ON ON ON
Time (t)
Time (t)
PID control
ON/OFF operation
AT started
AT finished
AT finished
Under AT
OFF OFF
LOW PV TYPE AUTO-TUNING
The Auto tuning function automatically
measures, computes and sets the optimum
Proportional band(P), Integral time(I), and
Derivative time(D). When Auto-tuning, the
controller performs ON/OFF control and
determine proper P.I and D. (Limit cycle type)
RT9-1 series have two types of Auto-tuning as
below.
Standard type auto-tuning :
This type is based on set point value (SV)
Low PV type auto-tuning :
This type is based on the value 10 % lower
than the set point value (SV)
Auto-tuning in Zone PID
Zone PID automatically sets PID group in
accordance with a measured value. In Zone
PID, auto-tuning sets the proper PID value by
recognizing a mid-value of reference point as
set point value.
Temperature
Set point
value (SV)
Process
value (PV)
Control
output
ON ON ON
Time (t)
SV-10%
Time (t)
PID control
ON/OFF operation
AT started
Under AT
OFF OFF
max. value of
measuriag
range (SV)
Reference
point 2
Reference
point 1
min. value of measuring range
PID 1
PID 2
PID 3
Time (t)
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