Prosoft-technology MVI71-MNET Uživatelský manuál stáhnout pdf (Strana 69)

Reference MVI71-MNET ♦ PLC Platform

User Manual Modbus TCP/IP Interface Module

ProSoft Technology, Inc. Page 69 of 109

June 23, 2009

Side-Connect Backplane Data Transfer

The side-connect interface is the simplest method to implement the module. No

ladder logic is required for the interface because the driver handles data

movement between the module and the processor automatically. The data flow

diagram associated with this interface is shown in the following diagrams:

The configuration information for the module determines the size of the read and

write data areas and the locations of these data sets in the module’s internal

database. Therefore, to use this interface, just set up the files required by the

module. The following table lists the files required for the side-connect interface:

File Number Example Size Description

Cfg File N10 200 Control/Status File

Cfg File+1 N11 to 1000 Data transferred from the module to the processor

Other files for read data

Cfg File+1+n N12 to 1000 Data transferred from the processor to the module

Cfg File+1+n+m Other files for write data

n is the number of read data files minus one. Each file contains up to 1000

words.

m is the number of write data files minus one. Each file contains up to 1000

words.

The number of read and write files are dependent on the modules configuration.

Two examples follow:

1 2 ... 64 65 66 67 68 69 70 71 72 73 74 ... 108 109

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Prosoft-technology MVI71-MNET Uživatelský manuál Strana 69