INFICON PSG55x ATM to Medium Vacuum Gauge (DeviceNet) - Manual (Page 39)

tira58e1-a (2012-03) PxG5xx.cp
39
Appendix
AA BB CC DD
h
(4-Byte, floating format) Legend: XX
h
Hexadecimal number
(Radix = 16)
XX
d
Decimal number (Radix = 10)
XX
b
Binary number (Radix = 2)
DD
h
CC
h
BB
h
AA
h
S E E E E E E E
b
E M M M M M M M
b
M M M M M M M M
b
M M M M M M M M
b
S EEEE EEEE
b
MMM MMMM MMMM MMMM MMMM MMMM
b
  
1+
MMM MMMM MMMM MMMM MMMM MMMMb
2
23








= 1+
NNNNN
d
d
8388608







Sign = Exponent = Mantissa =
-1 S XYZ
d
RSTUV
d
Sign × 2 (Exponent-127) × Mantissa
A: Conversion of a Floating
Number According to
IEEE 754
General
Number received
1. Reverse the sequence of
the HEX words
2. Separate into bytes
3. Calculate
Converted number
Sign 8-Bit exponent 23-Bit mantissa