Communication
3.2 Communication services
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05
3-17
Objectives in PROFINET
The objectives in PROFINET are:
• An open Ethernet standard for automation based on Industrial Ethernet
Industrial Ethernet and standard Ethernet components can be used together, however,
Industrial Ethernet devices are more reliable, and are therefore more suitable for
industrial environments (temperature, immunity to noise etc.)
• Use of TCP/IP and IT standards
• Automation with real-time Ethernet
• Total integration of field bus systems
Implementation of PROFINET by us
We have integrated PROFINET as follows:
• We have chosen PROFINET IO for integrated communication between field devices.
• We integrated communication between PLCs of distributed systems
with PROFINET CBA (Component-Based automation.)
• Installation engineering and network components are available in SIMATIC NET.
• For remote maintenance and network diagnostics, we used the proven IT standards from
the office world (for example, SNMP = Simple Network Management Protocol for network
configuration and diagnostics).
Documentation of PROFIBUS International on the Internet
On the Internet at "www.profibus.com" of PROFIBUS International (previously PROFIBUS
User Organization, PUO) you can find numerous articles relating to PROFINET.
For further information, refer to the Internet URL "www.siemens.com\profinet\".
What is PROFINET IO?
Within the framework of PROFINET, PROFINET IO is a communication concept for the
implementation of modular, distributed applications.
PROFINET IO allows you to create automation solutions, which are familiar to you from
PROFIBUS.
That is, you have the same application view in STEP 7, regardless of whether you configure
PROFINET or PROFIBUS devices.
What is PROFINET CBA (Component based Automation)?
Within the framework of PROFINET, PROFINET CBA is an automation concept for the
implementation of applications with distributed intelligence.
PROFINET CBA lets you create distributed automation solutions, based on default
components and partial solutions.
Component-Based Automation allows you to use complete technological modules as
standardized components in complex systems.
The components are also created in an engineering tool which may differ from vendor to
vendor. Components of SIMATIC devices are created, for example, with STEP 7.
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