Omron CP - PROGRAMMING MANUAL 05-2007 - Page 49

16
Programming Concepts Section 1-1
Signed BCD Data
Signed BCD data is a special data format that is used to express negative
numbers in BCD. Although this format is found in applications, it is not strictly
defined and depends on the specific application. The CP Series supports the
following instructions to convert the data formats: SIGNED BCD-TO-BINARY:
BINS(470), DOUBLE SIGNED BCD-TO-BINARY: BISL(472), SIGNED
BINARY-TO-BCD: BCDS(471), and DOUBLE SIGNED BINARY-TO-BCD:
BDSL(473). Refer to the CP-series CPU Unit Programming Manual (W451)
for more information.
Decimal Hexadecimal Binary BCD
0 0 0000 0000
1 1 0001 0001
2 2 0010 0010
3 3 0011 0011
4 4 0100 0100
5 5 0101 0101
6 6 0110 0110
7 7 0111 0111
8 8 1000 1000
9 9 1001 1001
10 A 1010 0001 0000
11 B 1011 0001 0001
12 C 1100 0001 0010
13 D 1101 0001 0011
14 E 1110 0001 0100
15 F 1111 0001 0101
16 10 10000 0001 0110
Decimal Unsigned binary (4-digit
hexadecimal)
Signed binary (4-digit
hexadecimal)
+65,535 FFFF Cannot be expressed.
+65534 FFFE
.
.
.
.
.
.
+32,769 8001
+32,768 8000
+32,767 7FFF 7FFF
+32,766 7FFE 7FFE
.
.
.
.
.
.
.
.
.
+2 0002 0002
+1 0001 0001
0 0000 0000
–1 Cannot be expressed. FFFF
–2 FFFE
.
.
.
.
.
.
–32,767 8001
–32,768 8000