Rockwell-automation 1794-OF8IH FLEX Isolated Input/Output HART Analog Manuel d'utilisateur télécharger pdf (Page 49)

Publication 1794-UM065B-EN-E - September 2010

1794-IF8IH and 1794-OF8IH Configuration 37

Examples

In each of the following examples, the module operates internally with little

Endian byte order.

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.

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 Ch2 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

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 163 164

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Rockwell-automation 1794-OF8IH FLEX Isolated Input/Output HART Analog Manuel d'utilisateur Page 49