Hitachi NJI-350B User Manual
Page 129
Chapter 5 Instruction Specifications
5-79
Item number
Application instructions-9
Name
Logical shift left
Ladder format
Condition code
Processing time (
µs)
Remark
R7F4
R7F3
R7F2
R7F1
R7F0
Average Maximum
LSL (d, n)
DER
ERR
SD
V
C
Upper case: W
z
z
z
z
↕
36
Lower case: DW
Instruction format
Number of steps
Condition
Steps
LSL (d, n)
3
45
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 shifted
{
{
{
{
{
n
Number of bits to be
shifted
{
{
{
{
{
The constant is set in
decimal.
Function
• Shifts the contents of d to the left (toward the upper digits) by n bits.
• “0” is set from the least significant bit to the nth bit.
• The content of the nth bit from the most significant bit is set in C (R7F0).
0
0 0
0
0
B
B
C (R7F0)
d
n bits
Most significant bit (MSB)
Least significant bit (LSB)
Before execution
After execution
n bits
If d is a word:
Designates the shift amount, depending on the contents (0 to 15) of the lower 4 bits (b3 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 15 (decimal).
If d is a double word:
Designates the shift amount, depending on the contents (0 to 31) of the lower 5 bits (b4 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 31 (decimal).
Notes
• If n is equal to “0,” the shifting is not performed. The previous state is retained in C.
Program example
X00001
DIF1
LSL
(WR0000 ,1 )
LD
X00001
AND DIF1
[
LSL
(WR0000 ,1)
]
Program description
• When X00001 rises, the content of WR0000 is shifted to the left by one bit.
At this time, “0” is set in b0 and the value of b15 immediately prior to the shift is set in R7F0.
LS
L (d,
n)