Hanyoung TH500 Manual page 72

⦁ Temp· Humidity PID
Name
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
P
regarding the Offset When proportional band is narrow, the time to
(Proportional)
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
I (Integral)
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
D
proportional to temperature change's slope When derivative
(Derivative)
time is longer, correction is getting better.
HYS.(Hysteresis)
Set up a hysteresis while controlloing ON/OFF or Autotuning
Set up a maximum value of output range
O/H
Set up a minimum value of output range
O/L
Controller Start
Controller Start
Controller Start
Controller Start
[FIG.105] ON/OFF control
offset
offset
Proportional control
Proportional control
Proportional control
Proportional control
[FIG.107] Proportion (P) and Proportional
Integration (P+I) control
Description
offset
offset
Proportional Integration(P+1)control
Proportional Integration(P+1)control
Proportional Integration(P+1)control
Proportional Integration(P+1)control
Time
Time
Time
Time
When the proportional range is narrow(Hunting occurs)
When the proportional range is narrow(Hunting occurs)
When the proportional range is narrow(Hunting occurs)
When the proportional range is narrow(Hunting occurs)
When the proportional range is wide(Offset gets larger)
When the proportional range is wide(Offset gets larger)
When the proportional range is wide(Offset gets larger)
When the proportional range is wide(Offset gets larger)
[FIG.106] Proportional control (P control)
Integration time is short
Integration time is short
Integration time is long
Integration time is long
Integration time is long
Integration time is long
[FIG.108] Proportional Integration
(P+I) control
73
Range
(0 ~ 100) % (TH500)
Temp
(0 ~ 600) ℃ (TH300)
Humidity
(0 ~ 200) % (TH300)
(0 ~ 6,000) s
(0 ~ 6,000) s
Refer specification
0.01 ~ 100,00
0.00 ~ 99.99
offset
offset
offset offset
Time
Time
Time
Time
Integration time is short
Integration time is short
Time
Time
Time
Time