Automationdirect.com DirectLOGIC DL205 Series User Manual

DL205 User Manual, 4th Edition, Rev. B
5–91
Chapter 5: Standard RLL Instructions - Math
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
C
D
Subtract (SUB)
Subtract is a 16-bit instruction that subtracts the BCD
value (Aaaa) in a V-memory location from the BCD value
in the lower 16 bits of the accumulator. The result resides
in the accumulator.
NOTE: A constant (K) cannot be used for the BCD value.
Status flags are only valid until another instruction that uses the same flags is executed.
In the following example, when X1 is on, the value in V2000 will be loaded into the
accumulator using the Load instruction. The value in V2006 is subtracted from the value in
the accumulator using the Subtract instruction. The value in the accumulator is copied to
V2010 using the Out instruction.
þ
þ
þ
þ
230
240
250-1
260
Standard RLL
Instructions
5–91
SUB
A aaa
Operand Data Type DL230 Range DL240 Range DL250-1 Range DL260 Range
A aaa aaa aaa aaa
V-memory V
All
See memory map
All
See memory map
All
See memory map
All
See memory map
Pointer P -
All V-memory.
See memory map
All V-memory.
See memory map
All V-memory.
See memory map
Discrete Bit Flags Description
SP63 On when the result of the instruction causes the value in the accumulator to be zero
SP66 On when the 16 bit addition instruction results in a carry
SP67 On when the 32 bit addition instruction results in a carry
SP70 On anytime the value in the accumulator is negative
SP75 On when a BCD instruction is executed and a NON-BCD number is encountered
Direct SOFT
Handheld Programmer Keystrokes
LD
V2000
X1
Load the value in V2000 into
the lower 16 bits of the
accumulator
SUB
V2006
Subtract the value in V2006
from the value in the lower
16 bits of the accumulator
OUT
V2010
Copy the value in the lower
16 bits of the accumulator to
V2010
V2010
02
1
(V2006)
(Accumulator)
2
0
0
V2000
475
883
000 475
592
Acc.
883
The unused accumulator
bits are set to zero
SHFT
ANDST
L
3
D
STR
$
SHFT SHFT
AND
V
2
C
0
A
0
A
ENT
6
G
OUT
GX
SHFT
AND
V
2
C
0
A
1
B
0
A
ENT
RST
S
ISG
U
1
B
1
B
ENT
2
C
0
A
0
A
0
A
ENT
_
DS Used
HPP Used

Automationdirect.com DirectLOGIC DL205 Series Specifications

General

Brand	Automationdirect.com
Model	DirectLOGIC DL205 Series
Category	Controller
Language	English