Double Bcd Multiply: Mull(076) - Omron SYSMAC CVM1 Series Operation Manual

BCD Calculation Instructions
Example
0000
TR0
03
A500
04
A500
04
1221
00

5-18-9 DOUBLE BCD MULTIPLY: MULL(076)

Ladder Symbol
(076)
MULL Md
Variations
j MULL(076)
Description
Precautions
The following example works much like that for single-word subtraction. In this
example, however, the 8-digit number in CIO 0121 and CIO 0120 is subtracted
from the 8-digit number in CIO 0201 and CIO 0200 when CIO 000003 is ON, and
the result is output to D00101 and D00100. If the result is negative, the comple-
ment is then subtracted from 0 to yield the actual number and CIO bit 002100 (a
self-holding bit) is turned ON to indicate the negative result.
(075)
SUBL 1220 1200
(041)
BSET #0000 D00000
(075)
SUBL D00000 D00100
Mr R
When the execution condition is OFF, MULL(076) is not executed. When the
execution condition is ON, MULL(076) multiplies the 8-digit content of Md and
Md+1 by the content of Mr and Mr+1, and places the result in R to R+3.
Note An equivalent symbol math instruction ( * BL(425)) is also available.
Md, Md+1, Mr, and Mr+1 must be BCD.
Note Refer to page 101 for general precautions on operand data areas.
(079)
CLC
First
subtraction
D00100
D00001
(079)
CLC
Second
subtraction
D00100
1221
00
Turned ON to
indicate nega-
tive result.
Operand Data Areas
st
Md: 1 multiplicand wd CIO, G, A, T, C, #, DM
st
Mr: 1 multiplier word CIO, G, A, T, C, #, DM
st
R: 1 result word CIO, G, A, DM
Md + 1
x
Mr + 1
R + 3 R + 2 R + 1
Section 5-18
Address Instruction Operands
00000 LD 000003
00001 OUT
00002 CLC(079)
00003 SUBL(075)
D00100
00004 AND A50004
00005 BSET(041)
#0000
D00000
D00001
00006 CLC(079)
00007 SUBL(075)
D00000
D00100
D00100
00008 LD
00009 AND A50004
00010 OR 122100
00011 OUT 122100
Md
Mr
R
TR0
1220
1200
TR0
245