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15-2
Ladder Logic (LAD) for S7-300 and S7-400
C79000-G7076-C504-02
15.1 Overview
Word logic instructions compare pairs of words (16 bits) and double words
(32 bits) bit by bit, according to Boolean logic. The following instructions
are available for performing word logic operations:
S (Word) And Word: Combines two words bit by bit, according to the And
truth table.
S (Word) And Double Word: Combines two double words bit by bit,
according to the And truth table.
S (Word) Or Word: Combines two words bit by bit, according to the Or
truth table.
S (Word) Or Double Word: Combines two double words bit by bit,
according to the Or truth table.
S (Word) Exclusive Or Word: Combines two words bit by bit, according to
the Exclusive Or truth table.
S (Word) Exclusive Or Double Word: Combines two double words bit by
bit, according to the Exclusive Or truth table.
What Are
Word Logic
Instructions?
Word Logic Instructions
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