Prosoft-technology MVI56-PDPMV1 Bedienungsanleitung PDF herunterladen (Seite 48)

Start Here MVI56-PDPMV1 ♦ ControlLogix Platform

User Manual PROFIBUS DPV1 Master

Page 48 of 255 ProSoft Technology, Inc.

March 22, 2011

Scenario 4: The PROFIBUS data fits into ten backplane blocks (same PROFIBUS data count

per block)

For this scenario, each backplane block reserves 10 words for PROFIBUS I/O

data. The configured PROFIBUS I/O size (100 words) will not fit into one block,

so ten backplane input blocks and ten backplane output blocks will be required.

Backplane Block Overview

Block

Number

Input/

Output

Total word count in

Backplane block

PROFIBUS Data

Word Count in

backplane block

Initial PROFIBUS

Data Word Offset in

backplane block

Last PROFIBUS Data

Word Offset in

backplane block

1 Input 18 10 0 9

2 Input 18 10 10 19

3 Input 18 10 20 29

4 Input 18 10 30 39

5 Input 18 10 40 49

6 Input 18 10 50 59

7 Input 18 10 60 69

8 Input 18 10 70 79

9 Input 18 10 80 89

10 Input 18 10 90 99

1 Output 15 10 0 9

2 Output 15 10 10 19

3 Output 15 10 20 29

4 Output 15 10 30 39

5 Output 15 10 40 49

6 Output 15 10 50 59

7 Output 15 10 60 69

8 Output 15 10 70 79

9 Output 15 10 80 89

10 Output 15 10 90 99

Note: This configuration would be extremely inefficient and is therefore not recommended. The first

example (Scenario 1) is a more efficient configuration that will accomplish the same thing much

faster with one backplane transfer. This example is here solely to illustrate how changing the I/O

sizes without changing the amount of PROFIBUS data to be transferred will affect the number of

I/O data blocks the module will need to transfer.

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