Automationdirect.com DirectLOGIC DL205 Series User Manual

DL205 User Manual, 4th Edition, Rev. B
5–115
Chapter 5: Standard RLL Instructions - Math
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
C
D
Multiply Top of Stack (MULS)
Multiply Top of Stack is a 16-bit instruction that multiplies a
4-digit BCD value in the first level of the accumulator stack
by a 4-digit BCD value in the accumulator. The result resides
in the accumulator. The value in the first level of the
accumulator stack is is removed and all stack values are moved
up one level.
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 will be loaded into the
accumulator using the Load instruction. The value in V1420 is loaded into the accumulator
using the Load instruction, pushing the value previously loaded in the accumulator onto the
accumulator stack. The BCD value in the first level of the accumulator stack is multiplied by
the BCD value in the accumulator using the Multiply Stack instruction. The value in the
accumulator is copied to V1500 and V1501 using the Out Double instruction.
ý
ý
ý
þ
230
240
250-1
260
MU L S
LD
V1400
X1
Load the value in V1400 into
the accumul ator
LD
V1420
Load the value in V1420 into
the accumul ator
OUTD
V1500
Copy the val ue in the
accum ulator to V1500
and V1501
XXXXXXXXLevel 1
XXXXXXXXLevel 2
XXXXXXXXLevel 3
XXXXXXXXLevel 4
XXXXXXXXLevel 5
XXXXXXXXLevel 6
XXXXXXXXLevel 7
XXXXXXXXLevel 8
00005 000Level 1
XXXXXXXX
Level 2
XXXXXXXXLevel 3
XXXXXXXX
Level 4
XXXXXXXXLevel 5
XXXXXXXX
Level 6
XXXXXXXXLevel 7
XXXXXXXX
Level 8
MULS
Multiply the value in
the accumul ator w ith the
value in the first level
of the accumulator stack
Acc.
V1400
5000
0000 5 000
Acc.
V1420
0200
0000 0200
Accum ulator stack
after 1st L DD
Accum ulator stack
after 2nd L DD
Acc.
0100 0000
0100 0000
V1500V1501
The unused accumulator
bits ar e set to zero
The unused accumulator
bits ar e set to zero
Handheld Programmer Keystrokes
SHFT
ANDST
L
3
D
STR
$
SHFT
ORST
M
ISG
U
ANDST
L
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
RST
S
ENT
DirectSOFT
Discrete Bit Flags Description
SP63 On when the result of the instruction causes the value in the accumulator to be zero.
SP70 On anytime the value in the accumulator is negative.
SP75 On when a BCD instruction is executed and a NON-BCD number was encountered.
DS Used
HPP Used

Automationdirect.com DirectLOGIC DL205 Series Specifications

General

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