Exchanging The Upper And Lower Bytes Of 32-Bit Binary Data - Mitsubishi Electric MELSEC iQ-R Series Programming Manual

Exchanging the upper and lower bytes of 32-bit binary data

DSWAP(P)
RnPCPU
RnCPU RnENCPU
(Process)
• The RnCPU and RnENCPU with firmware version "17" or later support this instruction. (Use an engineering tool with version "1.020W" or later.)
These instructions exchange upper and lower 8-bit data in the specified device.
Ladder
(d)
FBD/LD
EN ENO
d
■Execution condition
Instruction
DSWAP
DSWAPP
Setting data
■Description, range, data type
Operand Description
(d) Start device for storing the data whose upper and lower 8-
bit data is exchanged
EN Execution condition
ENO Execution result
■Applicable devices
Operand Bit
X, Y, M, L,
SM, F, B, SB,
FX, FY
*1

(d)
*1 FX and FY cannot be used.
Processing details
• The device specified by (d) exchanges its upper and lower 8-bit data.
b15 ∙∙∙ b12 b11 ∙∙∙ b8
(d)+1
0 1 0 1 0 1 0 1
b15 ∙∙∙ b12 b11 ∙∙∙ b8
(d)+1 1 0 1 0 1 0 1 0
Operation error
There is no operation error.
6 BASIC INSTRUCTIONS
522
6.7 Data Transfer Instructions
RnPCPU RnSFCPU RnSFCPU
(Redundant) (Standard) (Safety)
Execution condition
Word
J\ T, ST, C, D, W,
SD, SW, FD, R,
ZR, RD
 
b7 ∙∙∙ b4 b3 ∙∙∙ b0
1 0 1 0 1 0 1 0
b7 ∙∙∙ b4 b3 ∙∙∙ b0
0 1 0 1 0 1 0 1
ST
ENO:=DSWAP(EN,d);
ENO:=DSWAPP(EN,d);
Range



U\G, J\, Z
U3E\(H)G
 
b15 ∙∙∙ b12 b11 ∙∙∙ b8 b7 ∙∙∙ b4 b3
(d)
0 1 0 1 0 1 0 1 1 0 1 0 1
b15 ∙∙∙ b12 b11 ∙∙∙ b8 b7 ∙∙∙ b4 b3
(d) 1 0 1 0 1 0 1 0 0 1 0 1 0
Data type
32-bit signed binary
Bit
Bit
Double word Indirect
specification
LT, LST, LZ
LC
  
∙∙∙ b0
0 1 0
∙∙∙ b0
1 0 1
Data type (label)
ANY32
BOOL
BOOL
Constant Others
K, H E $
   