Appendix Aprofinet Io Technology; Introduction To Profinet - Omron PROFINET IO CJ1W-PRM21 Operation Manual

A-1

Introduction to PROFINET

PROFINET IO technology
As a common solution for the industrial communication, the PROFIBUS
International organisation introduced the PROFINET Industrial Ethernet
standard. PROFINET is the next step for building on the current:
• PROFIBUS DP, the well-known and established fieldbus;
• Industrial Ethernet.
PROFINET is the innovative and open standard for Industrial Ethernet.
PROFINET satisfies all requirements for automation technology. With
PROFINET, solutions can be implemented for factory and process automation,
for safety applications and for motion control. PROFINET is now standardized
in IEC 61158 and IEC 61784.
The use of PROFINET minimizes the cost of installation, engineering and
commissioning.
PROFINET IO
Distributed field or I/O Devices are integrated through PROFINET IO. This
uses the usual IO view of PROFIBUS DP, whereby the IO data of field devices
are cyclically transmitted to the process image of the PLC.
The PROFINET IO device model is based on the PROFIBUS implementation,
consisting of insertion (slots) and groups of I/O channels (subslots). The
characteristics of the field devices are described via a General Station
Description (GSD) on an XML basis.
The installation, monitoring and maintenance of PROFINET IO will be familiar
to engineers accustomed to PROFIBUS DP. The distributed field devices are
allocated to a controller during configuration.
PROFINET CBA
The PROFINET component model has its application in distributed automation
systems. This is mainly used for intelligent field devices with programmable
functionality as well as controllers. PROFINET CBA divides distributed,
complex applications into autonomous units of manageable size.
A distributed automation system based on these autonomous units simplifies
the modularization of plants and machines, permitting separate and cross-
vendor development.
PROFINET based on a component model is described using a PROFINET
Component Description (PCD), which is XML-based.
Appendix A
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