LSIS XBF-AH04A - Page 558

Chapter 15 PID Function (Built-in function)
15 - 9
Time
Target
temp.
Proportional
coefficient
Integral
time
Derivative
time
PI
Control
PID
Control
0
50
2.5
1.5
0.3
0
0
1
50
2.5
1.5
0.3
74.41
55.50
2
50
2.5
1.5
0.3
40.63
56.33
3
50
2.5
1.5
0.3
52.99
52.50
4
50
2.5
1.5
0.3
49.67
50.92
5
50
2.5
1.5
0.3
49.70
50.34
6
50
2.5
1.5
0.3
50.38
50.12
7
50
2.5
1.5
0.3
49.76
50.05
8
50
2.5
1.5
0.3
50.14
50.02
9
50
2.5
1.5
0.3
49.94
50.01
10
50
2.5
1.5
0.3
50.02
50.00
11
50
2.5
1.5
0.3
49.99
50.00
12
50
2.5
1.5
0.3
50.00
50.00
13
50
2.5
1.5
0.3
50.00
50.00
< Table 15.5 comparison of PI control and PID control >
< Figure 15.6 comparison of PI control and PID control >
(d) Considering table 15.5, in case PID control is used, max. overshoot decreases from 16.5℃ to
8.5℃. At this time, P coefficient, integral time, derivative time are not optimal values, just one of
the examples. Actually, P coefficient, integral time, derivative time values vary according to PID
control system.