Automationdirect.com DirectLOGIC DL205 Series, User Manual

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DL205 User Manual, 4th Edition, Rev. B
5–83
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 (CMP)
The compare instruction is a 16-bit instruction that
compares the value in the lower 16 bits of the
accumulator with the value in a specified V-memory
location (Aaaa). 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 constant 4526 will be loaded into the lower 16
bits of the accumulator using the Load instruction. The value in the accumulator is compared
with the value in V2000 using the Compare 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.
CMP
A aaa
þ
þ
þ
þ
230
240
250-1
260
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.
Handheld Programmer Keystrokes
V2000
Acc.
CONSTANT
4 5 2 6 ?
8 9 4 5
0 0 0 0 4 5 2 6 4 5 2 6 ?
LD
Compare the value in the
accumulator with the value
in V2000
Load the constant value
4526 into the lower 16 bits of
the accumulator
K4526
CMP
X1
V2000
Compared
with
SP60 C30
Direct SOFT
The unused accumulator
bits are set to zero
STR
$
SHFT
ANDST
L
3
D
SHFT
JMP
K
4
E
5
F
2
C
6
G
ENT
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
1
B
ENT
2
C
0
A
0
A
0
A
ENT SHFT
OUT
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
DS Used
HPP Used