Prosoft-technology MVI69-HART Manuel d'utilisateur télécharger pdf (Page 44)

Module Configuration MVI69-HART ♦ CompactLogix Platform

User Manual HART Multi-drop Master Communication Module

Page 44 of 169 ProSoft Technology, Inc.

March 29, 2012

2.3.2 Example of HART Command Function 34

The following example shows how to configure a command function 34 (WRITE

DAMPING VALUE) to write a damping values (seconds) to the HART slave

device.

According to the HART specification, this command will write one floating point

variables:

Word High Byte Low Byte

0 Floating Point Damping Value (Sec)

The HART device should also return the floating point value after it processes the

request:

Word High Byte Low Byte

0 Floating Point Damping Value (Sec)

The HART device also returns an integer status data:

Word High Byte Low Byte

1 STATUS WORD

This command will return the following number of words:

Parameter Data Type Direction Number of

Words

Database Address

(this example)

Damping Value Floating Point Written from MVI to slave 2 (4 bytes) 400 (word address)

or 800 (byte

address)

Damping Value Floating Point Read from slave to MVI 2 240 (word address)

Status Word Integer Read from slave to MVI 1 290 (word address)

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 168 169

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Prosoft-technology MVI69-HART Manuel d'utilisateur Page 44