Standard
RLL Instructions
5–44
Standard RLL Instructions
Accumulator / Stack Load and Output Data Instructions
Instructions that manipulate data also use the accumulator. The result of the
manipulated data resides in the accumulator. The data that was being manipulated
is cleared from the accumulator. The following example loads the constant value
4935 into the accumulator, shifts the data right 4 bits, and outputs the result to
V2010.
LD
K4935
X1
Load the value 4935 into the
accumulator
Shift the data in the accumulator
4 bits (K4) to the right
Output the lower 16 bits of the ac-
cumulator to V2010
0100100100110101
Constant
V2010
00000100100100110000010000000000
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 031 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Shifted out of
accumulator
0493
4935
SHFR
K4
OUT
V2010
S S S S
0000000000000000
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
0000000000000000
The upper 16 bits of the accumulator
will be set to 0
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
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.
Some of the data manipulation instructions use 32 bits. They use two consecutive V
memory locations or an 8 digit BCD constant to manipulate data in the accumulator.
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 value in the
accumulator is added with the value in V2006 and V2007 using the Add Double
instruction. The value in the accumulator is copied to V2010 and V2011 using the
Out Double instruction.
6739 5026
LDD
V2000
X1
Load the value in V2000 and
V2001 into the accumulator
ADDD
V2006
Add the value in the
accumulator with the value
in V2006 and V2007
OUTD
V2010
Copy the value in the
accumulator to V2010 and
V2011
V2010
V2000
5026
9072
V2001
6739
V2011
8739
(V2006 and V2007)
(Accumulator)
2000 4046+
90728739
Acc.
Changing the
Accumulator Data
To Next Page
Loading...
Need help?
General
