Fairbanks FB2255 Series Instrument PC2255 PC Software Utility Program - Manual (Page 55)

Section 6: PC2255 Utility Software
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6.7. Fieldbus / 4-20 mA, Continued
DATA TYPE
Data can be setup to output a 32 bit Integer
word or a 32 bit floating point value.
ENDIAN
The Endianess of a module is determined by
the network type, but can be changed from
Little Endian to Big Endian, or vice versa by
using the
"CHANGE ORDER" setting.
LITTLE ENDIAN FORMAT OR INTEL ORDER
In Little Endian Format, the least significant byte is stored first, followed by the
next three more significant bytes.
For example, a 32bit value of 0x12345678 would be stored in memory in
LITTLE ENDIAN as shown below.
•
Address + 0 0x78
•
Address + 1 0x56
•
Address + 2 0x34
•
Address + 3 0x12
BIG ENDIAN FORMAT OR MOTOROLA ORDER
In Big Endian Format, the most significant byte is stored first, followed by the next
three least significant bytes.
For example, a 32bit value of 0x12345678 would be stored in memory in
BIG ENDIAN as shown below.
•
Address + 0 0x12
•
Address + 1 0x34
•
Address + 2 0x56
•
Address + 3 0x78