Prosoft-technology MVI69E-MBS Manual do Utilizador descarregar pdf (Página 122)

Reference MVI69E-MBS ♦ CompactLogix Platform

User Manual Communication Module

Page 122 of 162 ProSoft Technology, Inc.

January 6, 2014

Example and State Diagram

Here is an example of a request to remote device to Return Query Data. This

uses a sub-function code of zero (00 00 hex in the two-byte field). The data to be

returned is sent in the two-byte data field (A5 37 hex).

Request

Response

Field Name

(Hex)

Field Name

(Hex)

Function

Sub-function Hi

Sub-function Lo

Data Hi

Data Lo

The data fields in responses to other kinds of queries could contain error counts

or other data requested by the sub-function code.

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Prosoft-technology MVI69E-MBS Manual do Utilizador Página 122