Rockwell Automation AutoMax Enhanced Ladder Language Reference Manual - Manual (Page 137)

6Ć5
6.2 Logical Not (NOT)
Use the Logical Not instruction to change each bit of a single variable to the opposite
value. While EN is true, the instruction performs a bitĆwise logical NOT operation on In.
The result is stored in Out.
The truth table for a bitĆwise logical NOT operation is as follows:
In Out
1 0
0 1