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Hart command 3 – Rockwell Automation 1770,D17706.5.21 SMART TRANSMITTER TOOLKI User Manual

Page 41

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HART Command Data Table Layouts

Appendix A

A-6

Use this command to read the primary variable current and up to four
predefined dynamic variables from the HART field device.

The primary variable current always matches the analog output current

of the device including alarm conditions and set values.

The secondary, tertiary, and 4th variables are defined by each device

type. For example, the secondary variable is the sensor temperature for
the 3051 pressure transmitter.

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 3

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 3 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

These six integer words are the

standard inputs that are required for

each HART command (see page 3Ć3).

This is the HART address that is returned

from HART Command 0 (see page AĆ3).

HART Command 3

Read Dynamic Variables & Primary
Variable Current