SIEMENS
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Siemens D 35 · 2017
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Overview
(continued)
2
Communication
PROFINET
Performance
Productivity and product quality determine the level of success
in the market. Precise motion control, dynamic drives, high-
speed controllers and the deterministic synchronization of
devices are therefore key factors in achieving superior produc-
tion. They facilitate high production rates and optimum product
quality at the same time.
Speed and precision
Fast motion control applications demand precise and determin-
istic exchange of data. This is implemented by means of drive
controllers using isochronous real time (IRT).
With IRT and isochronous mode, PROFINET permits fast and
deterministic communication. This synchronizes the various
cycles of a system (input, network, CPU processing and output),
even in the case of parallel TCP/IP traffic. The short cycle times
of PROFINET make it possible to raise the productivity of
machines and plants and to guarantee the product quality and
high level of precision.
The standardized PROFIdrive profile permits vendor-indepen-
dent communication between CPUs and drives.
Large quantity structures
The use of PROFINET makes it possible to overcome the existing
restrictions regarding the scope of machines and systems that
can be implemented. In one network, several different control-
lers can interact with their assigned field devices. The number of
field devices per PROFINET network is virtually unlimited – the
entire range of IP addresses is available.
High transmission rate
By using 100 Mbit/s in full duplex mode, PROFINET achieves a
significantly higher data rate than previous fieldbuses. This
means that other plant data can be transmitted over TCP/IP
without any problems, in addition to the process data.
PROFINET therefore meets the combined industrial demands for
simultaneously transmitting high-speed IO data and large
volumes of data for additional sections of the application. Even
the transmission of large volumes of data, such as that from
cameras, has no adverse effect on the speed and precision of
the IO data transmission, thanks to PROFINET mechanisms.
Media redundancy
A higher plant availability can be achieved with a redundant
installation (ring topology). The media redundancy can be im-
plemented not only with the aid of external switches, but also by
means of integrated PROFINET interfaces. Using the media
redundancy protocol (MRP), reconfiguration times of 200 ms
can be achieved. If the communication is interrupted in just one
part of the ring installation this means that a plant standstill is
prevented and any necessary maintenance or repair work can
be performed without any time pressure.
For motion control applications, PROFINET with IRT in ring
topologies offers the extended media redundancy for planned
duplication (MRPD) which operates in a seamless mode without
any reconfiguration time. If communication is interrupted
(e.g. a cable break) the process can continue operating without
interruption.
Seamless media redundancy illustrated by example of SINAMICS S120
with SIMOTION and SCALANCE X200IRT
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Benefits
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PROFINET is the open Industrial Ethernet standard for
automation
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PROFINET is based on Industrial Ethernet
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PROFINET uses TCP/IP and IT standards
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PROFINET is real-time Ethernet
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PROFINET enables seamless integration of fieldbus systems
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PROFINET supports fail-safe communication via PROFIsafe
and also via IWLAN
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More information
More information is available at
/profinet
SINAMICS
S120
SIMOTION
D4x5-2
SIMOTION
C240 PN
Switch
SCALANCE
X200IRT
SINAMICS
S120
SIMOTION
D4x5-2
PROFINET
G_D211_XX_00294a
© Siemens AG 2017