Exchanging The Upper And Lower Bytes Of 16-Bit Data - Mitsubishi Electric MELSEC iQ-F FX5 Programming Manual

Exchanging the upper and lower bytes of 16-bit data

SWAP(P)
These instructions swap the value of 8 bits of the upper and lower bytes of the device specified by (d).
Ladder diagram
(d)
FBD/LD
EN ENO
d
Setting data
■Descriptions, ranges, and data types
Operand Description
(d) Head device for storing the data to be swapped
EN Execution condition
ENO Execution result
■Applicable devices
Operand Bit
X, Y, M, L, SM,
F, B, SB, S
(d) 
Processing details
These instructions swap the value of 8 bits of the upper and lower bytes of the device specified by (d).
b15 b12 b11 b8 b7
∙∙∙ ∙∙∙ ∙∙∙
(d)
0 1 0 1 0 1 0 1 1 0
b15 b12 b11 b8 b7
∙∙∙ ∙∙∙ ∙∙∙
(d) 1 0 1 0 1 0 1 0 0 1
Precautions
If a continuous operation type instruction is used, swap is done in each operation cycle.
Operation error
There is no operation error.
7 BASIC INSTRUCTIONS
362
7.7 Data Transfer Instructions
Word
T, ST, C, D, W,
SD, SW, R

b4 b3 b0
∙∙∙
1 0 1 0 1 0
b4 b3 b0
∙∙∙
0 1 0 1 0 1
Structured text
ENO:=SWAP(EN,d);
ENO:=SWAPP(EN,d);
Range



Double word Indirect
U\G Z LC
  
Data type
16-bit signed binary
Bit
Bit
Constant
specification
LZ K, H
  
Data type (label)
ANY16
BOOL
BOOL
Others
E $
  