ProSoft MVI56-PDPMV1 - Page 44

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User Manual PROFIBUS DPV1 Master
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Scenario 1: The PROFIBUS data fits into one backplane block
This example uses the following backplane configuration:
For this scenario, each backplane block reserves 100 words for PROFIBUS data,
so the data fits into one backplane I/O block. The module will generate two block
IDs, blocks 0 and 1, in order to force a Block ID switch, as required for the ladder
logic to function correctly, but both blocks will contain the same data.
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
0
Input
108
100
0
99
1
Input
108
100
0
99
0
Output
105
100
0
99
1
Output
105
100
0
99