DL205 User Manual, 4th Edition, Rev. B
5–84
Chapter 5: Standard RLL Instructions - Logical
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
C
D
Compare Double (CMPD)
The Compare Double instruction is a 32–bit instruction that
compares the value in the accumulator with the value (Aaaa),
which is either two consecutive V-memory locations or an 8–digit
(max.) constant. The corresponding status flag will be turned on
indicating the result of the comparison.
NOTE:
The 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 and V2001 will be loaded into
the accumulator using the Load Double instruction. The value in the accumulator is
compared with the value in V2010 and V2011 using the CMPD instruction. The
corresponding discrete status flag will be turned on indicating the result of the comparison. In
this example, if the value in the accumulator is less than the value specified in the Compare
instruction, SP60 will turn on, energizing contact C30.
Handheld Programmer Keystrokes
LDD
Compare the value in the
accumulator with the value
in V2010 and V2011
Load the value in V2000 and
V2001 into the accumulator
V2000
CMPD
X1
V2010
Compared
with
SP60
C30
V2010
Acc.
V2000
4 5 2 6 7 7
?
7 2 9 9
V2001
4 5 2 6 7 2 9 9
V2011
6 7 3 9 5 0 2 6
Direct
SOFT
STR
$
SHFT
ANDST
L
3
D
SHFT
2
C
ORST
M
CV
P
STR
$
SHFT
ENT
STRN
SP
6
G
0
A
OUT
GX
SHFT
2
C
3
D
0
A
ENT
3
D
3
D
1
B
ENT
ENT
2
C
0
A
0
A
ENT
2
C
0
A
0
A
0
A
1
B
SHFT
OUT
þ
þ
þ
þ
230
240
250-1
260
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
Constant K
0-FFFFFFFF
0-FFFFFFFF
0-FFFFFFFF
0-FFFFFFFF
CMPD
A aaa
Discrete Bit Flags
Description
SP60
On when the value in the accumulator is less than the instruction value.
SP61
On when the value in the accumulator is equal to the instruction value.
SP62
On when the value in the accumulator is greater than the instruction value.
DS
Used
HPP Used