ProSoft Technology MVI69-PDPMV1 - Manual (Page 163)

MVI69-PDPMV1 ♦ CompactLogix or MicroLogix Platform Reference
PROFIBUS DPV1 Master User Manual
ProSoft Technology, Inc. Page 163 of 225
July 8, 2011
6.3 Functional Overview
6.3.1 About the PROFIBUS Protocol
PROFIBUS (Process Field Bus) is a widely-used, open-standards protocol
created by a consortium of European factory automation suppliers in 1989.
PROFIBUS is a Master/slave protocol. The Master establishes a connection to
one or more remote slaves. When the connection is established, the Master
sends the PROFIBUS poll messages (called telegrams in PROFIBUS) to the
slave or slaves. The MVI69-PDPMV1 module works as a Master only. It cannot
be a slave to some other Master.
The MVI69-PDPMV1 module also acts as an input/output module between
devices on a PROFIBUS network and the Rockwell Automation CompactLogix or
MicroLogix processor. The module uses an internal database to pass data and
mailbox requests and responses between the processor and the slave devices
on the PROFIBUS network.
PROFIBUS specifications include a variety of network types. The network type
supported by the MVI69-PDPMV1 module is PROFIBUS DP version 1, which is
designed for remote I/O systems, motor control centers, and variable speed
drives.
6.3.2 General Overview
This section of the manual describes the data structures and transfer
mechanisms used to exchange data between the MVI69-PDPMV1 module and
the CompactLogix processor.
The MVI69 module communicates with the processor over the backplane using
the following blocks of data:
 MVI69 Input Data Block
 MVI69 Output Data Block