Allen-Bradley PLC-2/30

Data Manipulation Instructions
Chapter 6
617
If the BCD value is > 4095, the overflow bit (bit 14 of the binary address)
will be set on.
The binary number result will be stored in the lower 12 bits (00-13) of a
word selected by the user.
To program a BCD to Binary conversion, press keys [CONVERT] 0. A
display represented by Figure 6.17 will appear.
Figure 6.17
BCD
to Binary Conversion Format
BCD T O BINAR Y
BCD
ADDR: 110-111
DATA: 000000
BINARY
ADDR: 010
DATA: 000000000000
010
(OV)
14
Numbers shown are default values. Bold numbers must be replaced by userentered values. The number of default address digits initially
displayed  3, 4, or 5  will depend on the size of the data table. Initially displayed default values are governed by the I/O rack configura 
tion.
BCD ADDR : Address where the first three digits of the BCD number are stored. The second threedigit address is where the
three leastsignificant BCD digits are stored.
BCD DA TA : The BCD number that is to be converted to binary .
BINAR
Y ADDR : Stores the binary number .
BINAR
Y DA TA : The 12 bits of the binary number equivalent to the BCD number .
OV :
Overflow bit. Set high when binary number is > 12 ones or a decimal equivalent of 004095. It is in a word where
the binary word is to be stored.
Figure 6.18 shows the symbolic format of Figure 6.17 after the following
conditions have been entered:
Convert the BCD number 004095 to Binary.
BCD
ADDR – The BCD number is stored in adjacent data table words 200
and 201
6.6.1
Programming a BCD to
Binary Conversion
Instruction
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com