Prosoft-technology MVI69-MCM Bedienungsanleitung PDF herunterladen (Seite 128)

Reference MVI69-MCM ♦ CompactLogix or MicroLogix Platform

User Manual Modbus Communication Module

Page 128 of 167 ProSoft Technology, Inc.

March 22, 2011

Write Block - Command Control

Here is the structure of the Command Control output image write block.

Offset Description Length (words)

0 5001 to 5006 or 5101 to 5106 1

1 Command index 1

2 Command index 1

3 Command index 1

4 Command index 1

5 Command index 1

6 Command index 1

7 to ( n )

Spare

( n ) = 60, 120, or 240 depending on the Block Transfer Size parameter (refer to the configuration

file).

Blocks in the range of 5001 to 5006 are used for Port 1, and blocks in the range

of 5101 to 5106 are used for Port 2. The last digit in the block code defines the

number of commands to process in the block. For example, a block code of 5003

contains 3 command indexes that are for Port 1. The Command index

parameters in the block have a range of 0 to 99 and correspond to Master

Command List entries.

The module responds to a Command Control write block with a input image read

block containing the number of commands added to the command queue for the

port.

Read Block - Command Control

Here is the structure of the Command Control input image read block.

Offset Description Length (words)

0 5000 to 5006 or 5100 to 5106 1

1 Write Block ID 1

2 Number of commands added to command queue 1

3 to ( n + 1 )

Spare

( n ) = 60, 120, or 240 depending on the Block Transfer Size parameter (refer to the configuration file).

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Prosoft-technology MVI69-MCM Bedienungsanleitung Seite 128