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Description
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.
There are bit logic instructions to perform the following functions:
• ---| |--- Normally Open Contact (Address)
• ---| / |--- Normally Closed Contact (Address)
• ---(SAVE) Save RLO into BR Memory
• XOR Bit Exclusive OR
• ---( ) Output Coil
• ---( # )--- Midline Output
• ---|NOT|--- Invert Power Flow
The following instructions react to an RLO of 1:
• ---( S ) Set Coil
• ---( R ) Reset Coil
• SR Set-Reset Flip Flop
• RS Reset-Set Flip Flop
Other instructions react to a positive or negative edge transition to perform the
following functions:
• ---(N)--- Negative RLO Edge Detection
• ---(P)--- Positive RLO Edge Detection
• NEG Address Negative Edge Detection
• POS Address Positive Edge Detection
• Immediate Read
• Immediate Write
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