Swap Byte (Swpb); Relay Ladder - Allen-Bradley Logix5000 Reference Manual

Move/Logical Instructions (MOV, MVM, BTD, MVMT, BTDT, CLR, SWPB, AND, OR, XOR, NOT, BAND, BOR, BXOR, BNOT)

Swap Byte (SWPB)

Operand Type
Source INT
DINT
REAL
Order Mode
Destination INT
DINT
REAL
The SWPB instruction rearranges the bytes of a value.
Operands:

Relay Ladder

Format Enter
Tag Tag that contains the bytes that you want to rearrange
If the source is
an
INT
DINT
REAL
Tag Tag to store the bytes in the new order
If the source is
an
INT
DINT
REAL
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
And you want to change the bytes to this
pattern (each letter represents a
different byte)
N/A
ABCD ? DCBA
ABCD ? CDAB
ABCD ? BADC
Then the destination must be an
INT
DINT
DINT
REAL
Chapter 7
Then select
Any of the options
REVERSE (or enter 0)
WORD (or enter 1)
HIGH/LOW (or enter 2)
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