Appendix – INFICON HPG400-SD ATM to Ultra-High Vacuum Gauge (DeviceNet) User Manual
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tira03e1-b (0310) BPG/HPG400-SDv1.cp
29
Appendix
Integer
int
–32767
… 32768
Unsigned integer
uint
0
… 65535
Float
float
according IEEE 754
Manufacturer product code
9 = BPG400-SD
10 = HPG400-SD
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
Ш
Ш
Ш
1+
MMM MMMM MMMM MMMM MMMM MMMMb
2
23
= 1+
NNNNN
d
d
8388608
Ø
Sign =
Exponent =
Mantissa =
-1
S
XYZ
d
RSTUV
d
Sign × 2
(Exponent-127)
× Mantissa
Sign
8-Bit exponent
23-Bit mantissa
A: Range of Values
B: Specific Codes
C: 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