Chapter 5 Temperature Measurement Module AH04PT/AH08PTG
5-47
Cooler: The setting value is 200 (20°C), and KP is 100 (10°C). The relation between the
temperature and the operation amount is shown below.
Proportional
band
Temperature
Operation amount
Cooler
20℃
100%
0%
30℃
Integral action: If temperature is controlled by a pure proportional action, there is difference
between the temperature controlled and a setting value. Therefore, if an
integral action is used with a proportional action, difference decreases as
time goes by, and the temperature controlled is the same as the setting value.
Derivative action: With regard to violent environmental change, a derivative action provides
more operation amount to make temperature return to its original controlled
state.
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