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8.3.2 How to create the FB
Starting from the Example No. 1, we can consider to control the following resources:
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Fan
motor
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Alarm for high temperature
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Alarm for low temperature
The diagram for each of them is:
Practically we can see that for every diagram we have:
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An analog variable that drives the output
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A bool variable as output
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A specific input value where the output is ON
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A specific input value where the output is OFF
The only difference is the action : DIRECT or INVERSE.
Inverse Action
Direct Action
Inverse Action
