Hitachi NJI-350B - Manual (Page 145)

Chapter 5 Instruction Specifications
5-95
Item number Application instructions-23 Name Swap
Ladder format Condition code Processing time ( µs) Remark
R7F4 R7F3 R7F2 R7F1 R7F0 Average Maximum
SWAP (d) DER ERR SD V C
z z z z z
Instruction format Number of steps 25 
Condition Steps
SWAP (d) 2
Bit Word Double word
Usable I/O
X Y
R,
M
TD, SS,
CU, CT WX WY
WR,
WM TC DX DY
DR,
DM C
o
nstant
Other
d I/O to be exchanged { {
Function
• Swaps the upper 8 bits and lower 8 bits contained in d.
0 0 0 1 1 1 0 1 0 1 1 0 1 1 0 1
0 1 1 0 1 1 0 1 0 0 0 1 1 1 0 1
(Before execution) d
(After execution) d
Notes
• Use edge trigger as the startup condition for this instruction.
Program example
X00000 DIF0
SWAP (WR0010 )
LD X00000
AND DIF0
[
SWAP (WR0010)
]
Program description
• The upper and lower bits of WR0010 are swapped at the leading edge of X00000, and are stored in WR0010.
WR0010 H1234 Before execution
WR0010 H3412 After execution
Note: Since a scan is executed when there is no leading edge DIF0, the upper and lower bits of WR0010 are swapped every
time a scan is executed.
SW
A
P
(
d)