Omron SYSMAC CV Series Operation Manual page 259

Conversion Instructions
Precautions
Flags
Example
0000
00
(277)
BISL #0002
When C = 0003 (Input Data Range: –1999 9999 to 9999 9999 BCD)
S+1
First the signed BCD data format and range in words S+1 and S are checked
against the data control word (C). If the check is okay, the signed BCD data in
words S+1 and S are converted to binary and output to the designated words
D+1 and D. If it is not okay, the Error Flag (A50003) will turn ON and the instruc-
tion will not be executed.
In signed BCD data, a –0 is treated as a +0.
When the data to be converted is a negative number, after being converted it will
be output as 2's complement and the Negative Flag (A50008) will turn ON. In
order to convert a 2's complement to the true value, it is necessary to subtract it
from 0.
Refer to page 115 for general precautions on operand data areas.
ER (A50003):
EQ (A50006)
N (A50008)
When CIO 000000 is ON in the following example, first the signed BCD data for-
mat and range in D00101 and D00100 are checked against data control word
"0002" (first operand). If the check is okay, the double signed BCD data in
D00101 and D00100 is converted to binary and output to D00201 and D00200.
D00100 D00200
S+1: D00101 S: D00100
F 3 4 5 6 7 8 9
D+1: D00201 D: D00200
F F C B 4 0 E B
S
7 digits BCD, 28 bits
0 to 9: Eighth digit BCD
A: Negative (-1)
F: Negative (–)
B to E: Error
Data format is 0002, and the leftmost digit is A to E
Data format is 0003, and the leftmost digit is B to E.
Data to be converted is not BCD.
Content of *DM word is not BCD when set for BCD.
Content of the converted data is all zeroes.
Converted number is negative.
Double signed BCD data
(-3456789)
Double signed binary data
Section 5-17
Address Instruction Operands
00000 LD 000000
00001 BISL(277)
D00100
D00200
#0002
247