SIEMENS
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Siemens D 21.4 · 2017
Communication
PROFINET
5
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Overview
(continued)
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 data 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 with-
out any problems, in addition to the process data. PROFINET
therefore meets the combined industrial demands for simultane-
ously 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 trans-
mission, 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 IRT in ring topolo-
gies offers the extended media redundancy for planned duplica-
tion (MRPD) which operates in a bumpless mode without any
reconfiguration time. If communication is interrupted (e.g. a
cable break) the process can continue operating without inter-
ruption.
System redundancy
SINAMICS S120 supports the PROFINET function "system
redundancy": SINAMICS S120 can now be connected to high-
availability systems such as SIMATIC S7-400H with two control-
lers. No additional hardware is required to make the connection.
Complex automation tasks in the process industry, in particular,
where plant availability and redundancy of the control system
are essential, require reliable communication with a high-avail-
ability system. Both controllers of the high-availability system
always have access to the SINAMICS S120. In the event of a
cable break or failure of a CPU, the other controller takes over,
thus ensuring uninterrupted communication.
Bumpless media redundancy illustrated by example of SINAMICS S120
with SIMOTION and SCALANCE X200IRT
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Benefits
•
PROFINET is the open Industrial Ethernet standard for
automation
•
PROFINET is based on Industrial Ethernet
•
PROFINET uses TCP/IP and IT standards
•
PROFINET is real-time Ethernet
•
PROFINET enables seamless integration of fieldbus systems
•
PROFINET supports fail-safe communication via PROFIsafe
and also via IWLAN
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Integration
PROFINET – SINAMICS S120 functions
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More information
Further information is available at
/profinet
SINAMICS S120
CU320-2 PN
CU320-2 DP
(CBE20)
CU310-2 PN
PROFINET with IRT
(isochronous mode)
Number of ports
2
4
2
Send cycle in ms, min.
0.25
0.5
0.25
Shared device
Bumpless media redundancy
(MRPD)
Step-change media
redundancy (MRP)
System redundancy S2
–
PROFIsafe
PROFIenergy
PROFIdrive
G_D211_XX_00294a
SINAMICS
S120
SIMOTION
D4x5-2
SIMOTION
C240 PN
Switch
SCALANCE
X200IRT
SINAMICS
S120
SIMOTION
D4x5-2
PROFINET
© Siemens AG 2017