Controller Start
[FIG.105] ON/OFF control
When the proportional range is narrow(Hunting occurs)
When the proportional range is wide(Offset gets larger)
offset
Time
[FIG.106] Proportional control (P control)
Name
Description
73
Range
(0 ~ 100) % (TH500)
Temp
(0 ~ 600) ℃ (TH300)
Humidity
(0 ~ 200) % (TH300)
(0 ~ 6,000) s
(0 ~ 6,000) s
⦁ Temp· Humidity PID
Proportional control
Proportional Integration(P+1)control
offset
Time
[FIG.107] Proportion (P) and Proportional
Integration (P+I) control
ontrol
Time
Integration time is short
Integration time is long
[FIG.108] Proportional Integration
(P+I) control
Set up proportional band. When proportional band is wide, the time to
reach to setting value is slow because of small quantity of control output
regarding the Offset When proportional band is narrow, the time to
reach to setting value is fast because of high quanity of control ouput .
But, if it is too narrow, hunting is appeared.
Set up integral time. Offset is appeared with using only the proportoinal
control. In this way, deviation is reduced with an integral operation and if
an integral time is too long, it is modified late and when integral time is
short, hunting is appeared again and gain.
Set up a derivative time. As a modification operation regarding
rapid temperature change, it has a control output which is
proportional to temperature change's slope When derivative
time is longer, correction is getting better.
Set up a minimum value of output range
Set up a maximum value of output range
Set up a hysteresis while controlloing ON/OFF or Autotuning
P
(Proportional)
I (Integral)
D
(Derivative)
HYS.(Hysteresis)
O/H
O/L
Refer specification
0.01 ~ 100,00
0.00 ~ 99.99
th300_500_통합본_th300_500_통합본.qxp 19. 6. 26. 오후 1:35 페이지 73
Summary of Contents for TH500A
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