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Hart command 1 – Rockwell Automation 1770,D17706.5.21 SMART TRANSMITTER TOOLKI User Manual

Page 39

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HART Command Data Table Layouts

Appendix A

A-4

Use this command to read the primary variable and unit code from a
HART field device. The primary variable is returned in floating-point
format and the unit code is returned as an integer.

Standard Inputs

Integer

Word 0

I/O Rack Number of 1770ĆHT1

Word 1

I/O Group Number of 1770ĆHT1

Word 2

Channel Number of HART field device

Word 3

Polling Address of HART field device

Word 4

Smart Transmitter Interface Command Number 16 (decimal)

Word 5

HART Command Number 1

CommandĆspecific Inputs

Integer

Words 6 Ć 8

HART Address of HART field device

Data Table Report PLC-5/25 Addr 31 Data Table File N10:0

Address 0 1 2 3 4 5 6 7 8 9

N10:0 4 6 3 0 16 1 9858 269 12807 0

N10:10 0 0 0 0 0 0 0 0 0 0

N10:20 0 0 0 0 0 0 0 0 0 0

N10:30 0 0 0 0 0 0 0 0 0 0

N10:40 0 0 0 0 0 0 0 0 0 0

N10:50 0 0 0 0 0 0 0 0 0 0

This is the HART address that is returned

from HART Command 0 (see page AĆ3).

These six integer words are the

standard inputs that are required for

each HART command (see page 3Ć3).

HART Command 1

Read Primary Variable