Prosoft-technology MVI69-HART Manuel d'utilisateur télécharger pdf (Page 101)

MVI69-HART ♦ CompactLogix Platform Reference

HART Multi-drop Master Communication Module User Manual

ProSoft Technology, Inc. Page 101 of 169

March 29, 2012

In point-to-point mode, the module only polls for a single instrument with a polling

address of zero. When the instrument is found by the channel, it continuously

polls for the data using command 3. Occasionally, it will poll for the configuration

information for the device. This is accomplished with HART commands 13, 14

and 15. Less frequently, the channel will perform a HART command 0 request to

see if any of the data for the instrument has changed. If communications is lost

with the device, the module will try to establish communications with the device

using command 0. If user commands are present and enabled, they will be

executed after each data poll.

When the point-to-point mode of auto-polling is enabled (Auto-Poll Code = P), the

following diagram applies to the channel operation:

1 2 ... 96 97 98 99 100 101 102 103 104 105 106 ... 168 169

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Prosoft-technology MVI69-HART Manuel d'utilisateur Page 101