MVI56-PDPMV1 ♦ ControlLogix Platform Start Here
PROFIBUS DPV1 Master User Manual
Page 39 of 251 ProSoft Technology, Inc.
Then, the PDPMV1_CONNECTION_INPUT user-defined data type must have an
array size of 250 words, as shown in the following illustration.
And, the PDPMV1_CONNECTION_OUTPUT user-defined data type must have an
array size of 248 words, as shown in the following illustration.
Note: Each backplane block contains certain registers reserved for general purposes (non-
PROFIBUS data transfer). The backplane input block reserves 8 words for general purposes and
the backplane output block reserves 5 words. You must subtract these reserved words from the
total I/O block size to calculate the actual number of PROFIBUS I/O data per backplane I/O block
and where the break points between data blocks will be in the PROFIBUS data arrays.
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