Prosoft-technology MVI69-MCM Bedienungsanleitung PDF herunterladen (Seite 119)

MVI69-MCM ♦ CompactLogix or MicroLogix Platform Reference

Modbus Communication Module User Manual

ProSoft Technology, Inc. Page 119 of 167

March 22, 2011

5.4.6 If Block Transfer Size = 240

5.4.7 Status Data Block (Read Block ID = 0)

After the last Read Block is sent, the module builds an output image (ID = 0) to

transfer the module’s status information to the processor. This information can be

used by the PLC program to determine the current status of the module. Ladder

logic should be constructed to transfer the information in this block to a user data

file. The structure of this block is shown in the following table.

Offset Content Description

0 Read Block ID Block identification code -1 to indicate a status block.

1 Write Block ID Block requested from the processor by the module.

2 Program Scan Count This value is incremented each time a complete program

cycle occurs in the module.

3 to 4 Product Code These two registers contain the product code of "MCM"

5 to 6 Product Version These two registers contain the product version for the

currently running software.

7 to 8 Operating System These two registers contain the month and year values for the

program operating system.

9 to 10 Run Number These two registers contain the Run Number value for the

currently running software.

11 Port 1 Command List

Requests

This field contains the number of requests made from this port

to slave devices on the network.

12 Port 1 Command List

Response

This field contains the number of slave response messages

received on the port.

1 2 ... 114 115 116 117 118 119 120 121 122 123 124 ... 166 167

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Prosoft-technology MVI69-MCM Bedienungsanleitung Seite 119