High
level Ethernet protocol
PROFINET is the innovative open standard for Industrial
Ethernet, development by Siemens and the Profibus
User Organization (PNO). With PROFINET, solutions
can be implemented for factory and process automation,
for safety applications, and for the entire range
of drive technology right up to clock-synchronized
motion control. PROFINET is standardized in IEC 61158
and IEC 61784. Profinet
products are certified by the PNO user organization,
guaranteeing worldwide compatibility.
PROFINET is based on Ethernet and uses TCP/IP and IT standards and complements
them with specific protocols and mechanisms to archive a good Real Time performance.
PROFINET enables the integration of existing Fieldbus systems like PROFIBUS,
DeviceNet, and Interbus, without changes to existing devices. That means that
the investments of plant operators, machine and system builders, and device manufacturers
are protected.
Real-Time classes
PROFINET offers a scalable performance with three
performance levels:
TCP/IP: for
non Real Time applications
Real
Time (RT): for Real Time transfer of
time-critical process data
Isochronous
Real Time (IRT): for motion control
applications
PROFINET Modes
PROFINET includes two modes and
allows to combine distributed automation
and distributed I/O.
PROFINET IO
Distributed I/O (Remote I/O) is connected through PROFINET IO. Here, the familiar
I/O view of PROFIBUS is retained, in which the user data from the field devices
are periodically transmitted into the process model of the control system.
PROFINET IO describes a device model, consisting of places of insertion (slots)
and groups of I/O channels (subslots). The technical characteristics of the
field devices are described by the GSD (General Station Description) on an
XML basis.
PROFINET CBA
This variation is an advanced concept for industrial automation which fulfills
the requirements of plant builders and operators for an system-wide and manufacturer-spanning
engineering process. The PROFINET component model sees its real use in distributed
automation systems. It is ideally suited for intelligent field devices with programmable
functionality as well as controllers. PROFINET CBA is based on the object-oriented
modelling of technological modules. Based on the object model, machines and installations
are structured in PROFINET in the form of technological modules. The functionality
of the technological modules is encapsulated in uniform PROFINET components.
From the outside, PROFINET components are accessed through uniformly defined
interfaces. They can be arbitrarily connected in this way.
Configuration with GSD-Files
During the setup phase of the PROFINET network, the Profinet Controller
must be configured with a special configuration tool such as Step7 from Siemens.
The configuration process is based on electronic device
data sheets (GSD-Files) which are required for each Profinet device. GSD-Files
are provided by the device manufacturer and contain electronic descriptions all
relevant communication parameter of the Profinet device.
HMS is an active member of the Profibus User Organization
and participates actively in the further standardization
of the Profinet technology. HMS offers
a broad range of Profinet products.
See
Anybus products supporting the PROFINET network
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