Rockwell Automation 1794-OF8IH FLEX Isolated Input/Output HART Analog Modules User Manual
Page 47
Publication 1794-UM065B-EN-E - September 2010
1794-IF8IH and 1794-OF8IH Configuration 35
Byte Order (2 of 2 bits)
This setting selects the byte order of module's data. Note: The MSW and EDT
words (Words 0, 1 and 15) of the Primary Input Data Table are not swapped.
All other Primary Input Data and Configuration Data are adjusted according
to the following chart
The purpose of this parameter is to allow this module to operate properly
within data networks or systems utilizing various byte orders, across all data
types (for example, Boolean data to 32 bit float data). Upon receiving the
configuration assembly the module must inspect BYTE ORDER to determine
how to interpret the configuration assembly.
Two sets of Byte Order bits are provided since the module will not know at
power-up and configuration reception what Endian format the configuration
6%
6
0
0
1
1
0
7%
7
0
0
1
1
1
8%
8
0
1
0
0
0
9%
9
0
1
0
0
1
10%
10
0
1
0
1
0
…
…
…
…
…
…
…
30%
30
1
1
1
1
0
31%
31
1
1
1
1
1
Byte Order
Byte Order
Group B
Byte Order
Group A
Bit 9
Bit 8
Bit 1
Bit 0
Description
0
0
0
0
Little Endian Format (default) — all data entries in true
Little Endian format
1
0
1
0
Word Swap — word swap only values requiring more
than one word, for example, 32 bit float values.
0
1
0
1
Byte Swap — byte swap all words in data table.
1
1
1
1
Big Endian Format — all data entries in true Big Endian
format.
IMPORTANT
Byte Order can not be changed using RSLogix 5000 software.
RSLogix 5000 uses the default Byte Swap setting.
1794-IF8IH HART Current Ratio
HART Current
Ratio Limit
Decimal
Value
Bits
15
14
13
12
11
7
6
5
4
3