Automationdirect.com DL06 - Page 276

DL06 Micro PLC User Manual, 3rd Edition, Rev. E
5-115
Chapter 5: Standard RLL Instructions
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A
B
C
D
NOTE: Status flags are valid only until another instruction uses the same flag.
In the following example, when X1 is on, the value in V1400 and V1401 will be loaded
into the accumulator using the Load Double instruction. The value in V1420 and V1421 is
loaded into the accumulator using the Load Double instruction, pushing the value previously
loaded in the accumulator onto the accumulator stack. The binary value in the first level of the
accumulator stack is subtracted from the binary value in the accumulator using the Subtract
Stack instruction. The value in the accumulator is copied to V1500 and V1501 using the Out
Double instruction.
SUBBS
DirectSOFT32 Display
LDD
V1400
X1
Load thevalue in V1400 and
V1401 into theaccumulator
LDD
V1420
Load thevalue in V1420 and
V1421 into theaccumulato
r
OUTD
V1500
Copy thevalue in the
accumulatortoV1500
and V1501
X XXXXXXXLevel 1
X XXXXXXXLevel 2
X XXXXXXXLevel 3
X XXXXXXXLevel 4
X XXXXXXXLevel 5
X XXXXXXXLevel 6
X XXXXXXXLevel 7
X XXXXXXXLevel 8
0 01A205BLevel 1
X XXXXXXX
Level 2
X XXXXXXXLevel 3
X XXXXXXX
Level 4
X XXXXXXXLevel 5
X XXXXXXX
Level 6
X XXXXXXXLevel 7
X XXXXXXX
Level 8
SUBBS
Subtract thebinaryvalue in
thefirst levelofthe
accumulatorstack from the
binar yvalue in the
accumulator
Acc.
V1400
205B
001A 205 B
V1401
001A
Acc.
V1420
50C 6
003A 50C 6
V1421
003A
Accumulatorstack
after1st LDD
Accumulatorstack
after 2nd LDD
Acc.
0020 306 B
0020 306 B
Handheld Programmer Keystrokes
SHFT
ANDST
L
3
D
STR
$
SHFT
ISG
U
1
B
OUT
GX
SHFT
3
D
1
B
5
F
0
A
0
A
ENT
1
B
ENT
1
B
4
E
0
A
0
A
ENT
ENT
SHFT
ANDST
L
3
D
1
B
4
E
2
C
0
A
ENT
3
D
1
B
RST
S
3
D
RST
S
SHFT
V1501
V1500
Discrete Bit Flags Description
SP63 On when the result of the instruction causes the value in the accumulator to be zero.
SP64 On when the 16-bit subtraction instruction results in a borrow.
SP65 On when the 32-bit subtraction instruction results in a borrow.
SP70 On any time the value in the accumulator is negative.
SP73 On when a signed addition or subtraction results in an incorrect sign bit.
DS Used
HPP Used
DirectSOFT
Subtract Binary Top of Stack (SUBBS)
Subtract Binary Top of Stack is a 32-bit instruction that subtracts
the binary value in the first level of the accumulator stack from
the binary value in the accumulator. The result resides in the
accumulator. The value in the first level of the accumulator stack
is removed and all stack locations are moved up one level