Prosoft-technology MVI69L-MBS Instrukcja Użytkownika Pobierz pdf (Strona 137)

MVI69L-MBS ♦ CompactLogix Platform Reference

Communication Module User Manual

ProSoft Technology, Inc. Page 137 of 154

January 6, 2014

7.4.15 Pass-through Formatted Block for Function 5

Block 9958: Pass-through Formatted Block for Function 5

Block 9958: Request from Module to Processor

Offset

Description

Read Block ID: 9958

Write Block ID: 9958

Number of word registers in Modbus data set

Starting address for Modbus data set

4 to 239

Data

The ladder logic is responsible for parsing and copying the received message

and performing the proper control operation as expected by the Master device.

The processor must then respond to the pass-through control block with an

output image write block with the following format.

Block 9958: Response from Processor to Module

Offset

Description

Write Block ID: 9958

1 to 239

Spare

This informs the module that the command has been processed and can be

cleared from the pass-through queue.

7.4.16 Pass-through Formatted Block for Function 15

Block 9959: Pass-through Formatted Block for Function 15

When the module receives a function code 15 in pass-through mode, the module

writes the data using block ID 9959 for multiple-bit data. First the bit mask clears

the bits to be updated. This is accomplished in RSLogix 5000 by ANDing the

inverted mask with the existing data.

Next, the new data ANDed with the mask is ORed with the existing data. This

protects the other bits in the INT registers from being affected.

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Prosoft-technology MVI69L-MBS Instrukcja Użytkownika Strona 137