TÀI LIỆU - Ladder Logic (LAD) for S7 - 300 and S7 - 400 Programming (SIEMENS)

Bit logic instructions work with two digits, 1 and 0. These two digits form the base of a number system called the binary system. The two digits 1 and 0 are called binary digits or bits. In the world of contacts and coils, a 1 indicates activated or energized, and a 0 indicates not activated or not energized.

The bit logic instructions interpret signal states of 1 and 0 and combine them according to Boolean logic. These combinations produce a result of 1 or 0 that is called the ”result of logic operation” (RLO).  The logic operations that are triggered by the bit logic instructions perform a variety of functions.


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