PROFINET – the Industrial Ethernet standard
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PROFINET is 100% Ethernet
PROFINET is Ethernet As comparison: PROFIBUS
Ethernet is the established standard in the IT world for fast exchange of data (IEEE 802.3) One line to which all nodes are connected
PROFINET is always full duplex Performance directly dependent on
simultaneous communication in two directions Controller number of nodes
100 MBit/s Master
100 MBit/s
100 MBit/s full duplex
PROFINET is always "switched Ethernet“
Slaves
Switches connected into a line
Distribution of network load
Devices
can be influenced using topology
PROFINET completely uses all possibilities offered by Ethernet
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Seite 2 PROFINET Industry Sector
The basic principle of Ethernet communication:
nesting of data in message frames
The OSI layer model for structured communication
Layer Services
7 Application
Web pages, mails, live pictures, network
HTTP, FTP, SMTP, information, etc.
6 Presentation
SNMP, etc.
5 Session
TCP
4 Transport TCP, UDP header
Application data
IP TCP
3 Network IP header header
Application data
Ethernet IP TCP Ethernet
2 Data link header header header
Application data
trailer
Ethernet, LLDP
Ethernet PROFINET Ethernet
1 Physical header header
Application data
trailer
Maximum performance with retention of Ethernet standards
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Seite 3 PROFINET Industry Sector
Mechanisms for real-time communication in PROFINET
Separate channels for IO data and TCP/IP
Performance and deterministic behavior through priority assignment of I/O data
Openness for every type of Ethernet communication
TCP, UDP, IP, etc.
Integration of Ethernet devices in machines and systems
(Webcam, network printer, etc.)
Time scheduling
Send cycle
IO data TCP/IP Next cycle
1 2 n-1 n 1 2 n-1 n
Open for any communication
Real-time and standard on one cable = totally integrated uniformity
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Seite 4 PROFINET Industry Sector
“PROFINET – This is my way”
PROFINET… … provides more flexibility, efficiency and performance in your application
Flexibility Efficiency Performance
Tailor-made plant
Optimal use of resources Increased productivity
concepts
Industrial Wireless LAN One cable for all purposes Speed
Safety Device/network diagnostics High precision
"With PROFINET we Flexible topologies Easy cabling
Energy efficiency Large quantity structures
are able to
Open standard Easy cabling High transmission rate
implement new
machine and plant Web tools Fast device replacement Media redundancy
concepts, making us
more competitive – Expandability Ruggedness/stability Fast start-up
This is my way!"
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Seite 5 PROFINET Industry Sector
"PROFINET is pure flexibility."
Highest flexibility… … for tailor-made plant concepts
Flexibility
Tailor-made plant
concepts Line
(Redundant) Ring
Industrial Wireless LAN
Safety
"We have a large Flexible topologies Star
number of moving Tree
sections in our Open standard
production plant. I
need maximum Web tools
flexibility for this and Expandability Wireless communication
that’s what PROFINET (IWLAN)
PROFINET
guarantees." PROFIsafe
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Seite 6 PROFINET Industry Sector
What flexibility stands for
Industrial Wireless LAN PROFINET
Wireless connection of remote or mobile
machine and plant components
Support of Safety communication Flexibility
Mobile operating concepts
Tailor-made
Flexible topologies plant concepts
Line
(Redundant) ring
Line topology and redundant ring structures for
Industrial Wireless LAN
Tree
Star
less cabling and easy commissioning
Wireless communication
Innovative new concepts like I-Device and Safety
PROFINET
PROFIsafe
(IWLAN)
Shared Device for intelligent architectures
Flexible topologies
Open standard
Web tools
Web tools
Direct access to diagnostic information via
standard web browser (without Step7) Expandability
Individually adaptable maintenance concepts
due to user-defined web pages
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Seite 7 PROFINET Industry Sector
"Everything runs through one cable with PROFINET and that is very
efficient."
More efficiency… … ensures optimum use of resources
Efficiency HMI device
Diagnostic data
Controller
Web cam Safety-
oriented data
Optimal use of resources
PROFINET IO data
One cable for all purposes
PROFIsafe PROFIenergy
Data for
Device/network diagnostics
energy efficiency
Motion
Easy cabling
Energy efficiency Control
CNC
"Everything runs TCP/IP data
Controller
Easy cabling (Web)
through one cable
with PROFINET. Fast device replacement
That makes it really Access Client Drive
efficient for me." Ruggedness/stability Point Modules
Field device
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Seite 8 PROFINET Industry Sector
What efficiency comprises
One cable for all purposes PROFINET
Integration from control level to field device
with Ethernet
Cost reduction due to less cabling overhead Efficiency
Optimum utilization of
Energy efficiency resources
Significant energy savings even in short breaks
One cable for all purposes
due to selective switching
Full availability created at end of break Device/network diagnostics
Easy cabling
Energy efficiency
Easy cabling
Fast device replacement
Fast device replacement
No programming tool and engineering
personnel required for device replacement in Ruggedness/stability
case of maintenance
Reduction of standstill time
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Seite 9 PROFINET Industry Sector
"I only get real performance with PROFINET."
High performance… … increases your productivity.
Performance Robot
Presses
Application
Warehouse and logistics
Packaging machines
Increased productivity Printing presses
Machine tools
Speed Production lines Power reserve Bus cycle
High precision 10ms 1ms 100 s 10 s
Communication
Large quantity structures
mechanisms
TCP/IP
"High speed by itself up to 250 s up to 31.25 s
is not everything. High transmission rate
Real Time Isochronous Real Time
PROFINET is not Media redundancy
only faster but can PROFINET
also do more." Fast start-up
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Seite 10 PROFINET Industry Sector
What performance means to us
Speed PROFINET
Isochronous real-time mode for time critical and
precise applications
Capability to reduce the cycle time down to
31.25µs
Performance
High transmission rate Increased productivity
By using Ethernet, significantly higher
Switches connected into a line Speed
transmission rate than previous fieldbuses
100 Mbit/s Parallel operation of data-intense applications High precision
100 Mbit/s
100 Mbit/s full duplex
without effect on I/O data transfer
Large quantity structures
High transmission rate
Fast start-up
Media redundancy
Modular concept without waiting periods due to
faster detection of PROFINET devices by the Fast start-up
controller
Faster and more productive tool changers
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Seite 11 PROFINET Industry Sector
Increase of performance with PROFINET…
PROFIBUS or PROFINET?
PROFIBUS PROFINET
Bus cycle time
Baud rate 12MBit/s 100MBit/s
Cycle time Min. 300µs Min. 31.25µs
Jitter <1µs <1µs
# Devices in a line 128 100
# Devices per Controller 125 256
“My PROFIBUS
experience also enabled # Devices per rack 1625 768
me to set up the 3 Onboard IF + 10 CPs 1 Onboard IF + 4 CPs
PROFINET solution
PROFIBUS PROFIBUS PROFINET IO data n/a Max. 50%
without problems. In 1.5 MBit 12 MBit
= 1.500Byte bei 250µs
doing so, I discovered
the many benefits of TCP/IP etc. n/a Min. 50%
PROFINET.” PROFINET offers a = 1.500Byte bei 250µs
significant performance gain
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Seite 12 PROFINET Industry Sector
…and cost savings at the same time
Transition form PROFIBUS
to PROFINET
PROFIBUS Configuration PROFINET Configuration
Bitrate
Interface Devices Interface Devices Cycletime
min TSDR
1: DP 28x ET200S 12MBit 1: PN 45x ET200S 1 and
10ms 71x FU 2 ms
2: MPI/DP 17x ET200S 1,5MBit
7,8ms 1-2 ms
3: IF 28x 12MBit
FU 10ms
4: IF 20x 12MBit
FU 10ms
5: CP ext 23x 1,5MBit
FU 7,9ms
7-10 ms
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Seite 13 PROFINET Industry Sector
PROFINET – the best of PROFIBUS and Ethernet
TCP/IP
TCP/IP Safety
PROFINET
IO
Safety
Energy
IO Manag.
Synch
Sync
PROFINET
Strengths of PROFIBUS Strengths of Ethernet
IO communication High data rate
Energy
Manag. Safety Wireless
Diagnosis Flexible topologies
PROFINET combines proven principles of PROFIBUS with new features of Ethernet
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Seite 14 PROFINET Industry Sector
New possibilities increase efficiency thanks to PROFINET
Savings on Hardware
Shared Device –
2 Controllers have access to
1 IO Device
Simplified Engineering IO controller 1
CPU1
Increase of efficiency I-Device – Intelligent IO device
IO device 1
with new innovative Controller 2 is device for I-Device
Controller 1 CPU2
architectures and real IO controller 2
Hierarchical structures
networks IO device 2
Combined Advantages
I-Device + Shared Device
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Seite 15 PROFINET Industry Sector
Easy access to diagnosis information with web tools
Online
diagnosis
System
Integrated
PROFINET
Web Server
System Online
topology
Easy access via browser
Process
No engineering tool needed
Online network diagnosis User
Read/write process defined
web pages
variables (quick machine
parameters setting)
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Seite 16 PROFINET Industry Sector
Isochronous real-time
Reservation of bandwidth for Ethernet
IRT Standard channel IRT Standard channel IRT
channel channel channel
Cycle 1 Cycle 2 Cycle n
= time window
i.e. position controller 1 ms
Isochronous RT Standard
communication communication communication
IRT data RT data TCP/IP data
Separate time window reserved only for IRT frames
Standard frames cannot interrupt IRT cycle
IRT channel
Additional communication planning through topology for maximum performance
with isochronous applications
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Seite 17 PROFINET Industry Sector
Unique selling proposition of PROFINET:
real-time and TCP/IP
PROFINET
PLC
PROFINET Real-time
PC HTTP SNMP Socket RT IRT PROFINET
Internet Explorer field device
TCP/UDP
IP
Ethernet ERTEC
PROFINET
cable
Sensor system
PC PROFINET
SNMP/OPC server PLC
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Seite 18 PROFINET Industry Sector
PROFINET uses the full bandwidth with full duplex
Simultaneous sending and receiving
Almost complete utilization of physically possible transmission
1 2 n
bandwidth
Extremely short cycle times with consideration of topology
Outputs
PROFINET
1 2 n-1 n 1 2 n-1 n
1 2 n-1 n 1 2 n-1 n
Inputs
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Seite 19 PROFINET Industry Sector
Isochronous mode
Perfect synchronism
Isochronous recording of
actual position values Communication cycle
Isochronous activation of
setpoints
Controller Field device Motion Drive
Control
Synchronization of control cycles with the bus cycles
IRT channel Closing of the control loops over the bus
Distributed motion control tasks (longitudinal shaft, axis synchronization, multi-axis applicati
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Seite 20 PROFINET Industry Sector
Timing with isochronous mode – absolutely deterministic
Ti:
System cycle
Read inputs at fixed point in time
OB OB OB
OB:
Q I Q I Q I Process data in the CPU
To:
Ti To Write outputs at fixed point in time
CPU
All time windows coordinated in the appropriate
sequence
Input Output
ET 200S ET 200S
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Seite 21 PROFINET Industry Sector
Thank you for your attention!
Wolfgang Schroeder
Product Manager PROFINET Technology
I IA AS FA SB-PRM6
Telefon: +49 911 895-4633
E-Mail: wolfgang.schroeder@siemens.com
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