Rockwell Automation 1794-OF8IH FLEX Isolated Input/Output HART Analog Modules - Manual (Page 75)

Publication 1794-UM065B-EN-E - September 2010
1794-IF8IH and 1794-OF8IH Configuration 63
Little Endian Byte Order
If Byte Order indicates Little Endian, utilize the configuration assembly
directly.
Provide all data to the Primary Data table in Little Endian byte order.
The following two tables are an example of the Primary Input Data, if Byte
Order indicated Little Endian.
Word Swap BYTE ORDER
If BYTE ORDER indicates Word Swap, utilize the known structure of the
configuration assembly to re-order multi-word data elements to Little Endian
byte order, for example, word swap FLOATS).
Partial Configuration Assembly as Received
1 Param A Ch2 Param B Ch2 Param A Ch1 Param B Ch1
2 Param C CH0 (2nd byte) Param C CH0 (low byte)
3 Param C CH0 (high byte) Param C CH0 (3rd byte)
Partial Configuration Assembly after BYTE ORDER Inspection and Processing
1 Param A Ch2 Param B Ch2 Param A Ch1 Param B Ch1
2 Param C CH0 (2nd byte) Param C CH0 (low byte)
3 Param C CH0 (high byte) Param C CH0 (3rd byte)
Primary Input Data Before BYTE ORDER Processing for Little Endian
1 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte)
2 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte)
3 Ch2 Data C Ch 2 Data B
Primary Input Data After BYTE ORDER Processing for Little Endian
1 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte)
2 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte)
3 Ch2 Data C Ch 2 Data B
Partial Configuration Assembly as Received
1 Param A Ch2 Param B Ch2 Param A Ch1 Param B Ch1
2 Param C CH0 (high byte) Param C CH0 (3rd byte)
3 Param C CH0 (2nd byte) Param C CH0 (low byte)