AutomationDirect DL105 - Shift Right (SHFR)

Standard
RLL Instructions
5--68
Standard RLL Instructions
Bit Operation Instructions
DL105 PLC User Manual, 3rd Edition
SHFR
A aaa
Shift Right is a 32 bit instruction that shifts
the bits in the accumulator a specified
number (Aaaa) of places to the right. The
vacant positions are filled with zeros and
the bits shifted out of the accumulator are
lost.
Operand Data Type DL130 Range
A aaa
V--memory V All (See page 4--29)
Constant K 1--32
In the following example, when X1 is on, the value in V2000 and V2001 will be loaded
into the accumulator using the Load Double instruction. The bit pattern in the
accumulator is shifted 2 bits to the right using the Shift Right instruction. The value in
the accumulator is copied to V2010 and V2011 using the Out Double instruction.
Handheld Programmer Keystrokes
D
i
r
ec
t
SOFT
LDD
V2000
X1
Load the value in V2000 and
V2001 into the accumulator
SHFR
K2
The bit pattern in the
accumulator is shifted 2 bit
positions to the right
OUTD
V2010
Copy the value in the
accumulator to V2010 and
V2011
0011000100000001
V2010
01001100010000000000010000000000
151413121110987654321031 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
4C40
S S S S
0001100111000001
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
0110011100000101
1514131211109876543210
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 1631 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Acc.
Acc.
V2011
19C1
Constant
6705 3101
Shifted out of the
accumulator
V2001 V2000
STR
$
SHFT
ANDST
L
3
D
3
D
SHFT
RST
S
7
H
5
F
2
C
ENT
OUT
GX
SHFT
3
D
ORN
R
SHFT
1
B
ENT
2
C
0
A
0
A
0
A
ENT
2
C
0
A
1
B
0
A
ENT
Shift Right
(SHFR)