ProSoft Technology 5104-DNPS-PDPM - Manual (Page 7)

PDPM ♦ ProLinx Gateway Functional Overview
PROFIBUS DP Master Protocol Manual
ProSoft Technology, Inc. Page 7 of 70
June 24, 2013
2 Functional Overview
In This Chapter
 About the PROFIBUS Protocol ................................................................ 7
 PROFIBUS DP Architecture .................................................................... 7
 Communication Types ............................................................................. 8
 Master/Slave Communication Phases ..................................................... 9
 Module Internal Database ....................................................................... 9
 Master/Slave Communication Phases ................................................... 11
 Port Physical and Protocol Specifications ............................................. 11
The PROFIBUS Master protocol driver exists as a single port implementation.
The driver can be configured as a Class 1 PROFIBUS Master to interface with
other PROFIBUS slave devices. The unit is also used for configuration of the
nodes on the PROFIBUS network. It provides access to both standard as well as
extended diagnostic information and freeze/sync capability. The PROFIBUS
master port can be used to continuously interface with PROFIBUS slave devices
over a serial communication interface (RS-485).
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
the remote slave. When the connection is established, the master sends the
PROFIBUS commands to the slave. The PDPM module works as a master only.
The module uses an internal database to pass data and commands between the
processor and the client and server devices on the PROFIBUS network.
PROFIBUS supports a variety of network types. The network type supported by
the PDPM module is PROFIBUS DP (Device Bus), which is designed for remote
I/O systems, motor control centers, and variable speed drives.
2.2 PROFIBUS DP Architecture
The PROFIBUS DP Master network supports multiple Master systems with
several slaves.
The following table shows the most important features of PROFIBUS DP Master: