ProSoft Technology MVI46-PDPMV1 - Manual (Page 114)

Reference MVI46-PDPMV1 ♦ SLC Platform
User Manual PROFIBUS DPV1 Master
Page 114 of 160 ProSoft Technology, Inc.
March 25, 2011
6.2 Functional Overview
The MVI46 module communicates with the processor over the backplane using
only the following two data files:
M1 Data File
M0 Data File
This section of the Application Reference Guide describes the data structures
and transfer mechanisms used to transfer data between the MVI46-PDPMV1
module and the SLC processor using these files.
6.2.1 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 MVI46-PDPMV1 module works as a Master only. It cannot
be a slave to some other Master.
The MVI46-PDPMV1 module also acts as an input/output module between
devices on a PROFIBUS network and the Rockwell Automation SLC 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 MVI46-PDPMV1 module is PROFIBUS DP version 1.0, which is
designed for remote I/O systems, motor control centers, and variable speed
drives.