Omron C200HE Manual Do Utilizador
28
Signed Binary
Signed binary data can have either a positive and negative value. The sign is
indicated by the status of bit 15. If bit 15 is OFF, the number is positive and if bit 15
is ON, the number is negative. Positive signed binary values range from 0
($0000) to 32,767 ($7FFF), and negative signed binary values range from
–32,768 ($8000) to –1 ($FFFF).
Bit number
Contents
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Digit value
16
3
16
2
16
1
16
0
Sign indicator
Eight-digit positive values range from 0 ($0000 0000) to 2,147,483,647 ($7FFF
FFFF), and eight-digit negative values range from –2,147,483,648 ($8000
0000) to –1 ($FFFF FFFF).
The following table shows the corresponding decimal, 16-bit hexadecimal, and
32-bit hexadecimal values.
Decimal
16-bit Hex
32-bit Hex
2147483647
2147483646
2147483646
.
.
.
.
.
32768
32767
32766
32767
32766
.
.
.
.
.
2
1
0
1
0
–1
–2
–2
.
.
.
.
.
–32767
–32768
–32769
–32768
–32769
.
.
.
.
.
–2147483647
–2147483648
–2147483648
---
---
---
.
.
.
.
.
---
7FFF
7FFE
.
.
.
.
.
0002
0001
0000
0001
0000
FFFF
FFFE
.
.
.
.
.
8001
8000
8000
---
.
.
.
.
.
---
---
---
7FFFFFFF
7FFFFFFE
.
.
.
.
.
00008000
00007FFF
00007FFE
.
.
.
.
.
00000002
00000001
00000000
00000001
00000000
FFFFFFFF
FFFFFFFE
.
.
.
.
.
FFFF8001
FFFF8000
FFFF8000
FFFF7FFF
.
.
.
.
.
80000001
80000000
80000000
Positive signed binary data is identical to unsigned binary data (up to 32,767)
and can be converted using BIN(100). The following procedure converts nega-
tive decimal values between –32,768 and –1 to signed binary. In this example
–12345 is converted to CFC7.
Converting Decimal to
Signed Binary
Signed Binary
Data Area Structure
Section 3-2