3. Instructions
146
CS/CJ/NSJ Series Instructions Reference Manual (W474)
AND LD/OR LD
Applicable Program Areas
Flags
There are no flags affected by this instruction.
Function
Hint
Instruction Mnemonic Variations
Function
code
Function
AND LOAD AND LD --- --- Takes a logical AND between logic blocks.
OR LOAD OR LD --- --- Takes a logical OR between logic blocks.
Symbol
AND LD OR LD
Area
Function block
definitions
Block program areas Step program areas Subroutines Interrupt tasks
SFC action or
transition programs
Usage OK OK OK OK OK OK
z AND LD
AND LD connects in series the logic block just before
this instruction with another logic block.
The logic block consists of all the instructions from a
LOAD or LOAD NOT instruction until just before the
next LOAD or LOAD NOT instruction on the same
rungs.
z OR LD
OR LD connects in parallel the logic block just before
this instruction with another logic block.
The logic block consists of all the instructions from a
LOAD or LOAD NOT instruction until just before the
next LOAD or LOAD NOT instruction on the same
rungs.
z AND LD
• Three or more logic blocks can be connected in series using this instruction to first connect two of the
logic blocks and then to connect the next and subsequent ones in order. It is also possible to continue
placing this instruction after three or more logic blocks and connect them together in series.
z OR LD
• Three or more logic blocks can be connected in parallel using this instruction to first connect two of
the logic blocks and then to connect the next and subsequent ones in order. It is also possible to
continue placing this instruction after three or more logic blocks and connect them together in
parallel.
Logic block Logic block
Logic block
Logic block
LD
LD
AND LD
Logic block A
Logic block B
Serial connection between logic block A and
logic block B.
to
to
LD
LD
OR LD
to
to
Logic block A
Logic block B
Parallel connection between logic block A and
logic block B.
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