
Example 5
Practical example: Screen up/down – Open/Close
Logic
This ex, Illustrates a practical - day to day - programming
issue
The purpose is not only to activate the relays, but also to
implement security to avoid two relays to be closed at the
same time and to provide different kinds of feedback to the
button: move up/down and position up/down
Used Logic Symbol(s): BUFFER, NOR, MOS, INTERLOCK, OR, DELAY, OSC
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