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Wireless Profibus & Profisafe in realtime control loops
Schildknecht AGwww.schildknecht.info
(Vorstand Dipl.Ing. Thomas Schildknecht)
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Profibus market growing
ARC field study: : 700 000 total safety bus devices630 000 installed profisafe
90% market share
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Forcast Profibus market growing
SPS Magazin 4/2009Expected Profibus growing 2008 -201225 Mio to 50 Mio
= 100% in next 4 years
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Frost & Sullivan wireless study 2009
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Closed control loop with wireless Profibus
SIEMENS S72,4GHz WLAN 2,4GHz Bluetooth 1,9GHz DECT 5GHz 802.11a 2.4GHz Zigbee
Delay 20ms 25ms 50ms 20ms 100ms
Profibus & Profisafe up to 1.5Mbit
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Wireless QoS classification ISA-100
•class 0 Emergency action always critical
•class 1 Closed loop regulatory control often critical
•class 2 Closed loop supervisory control usually non-critical
•class 3 open loop control human in the loop
•class 4 Alerting / Visualisation e.g. event-based maintance
•class 5 Logging, Up- Download historic data collection
Application Description
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DATAEAGLE key features
•No changes in PLC project or application because use of wireless
•Profibus speed 9600 up to 1.5Mbit
•DATAEAGLE is worldwide the only system for transparent wireless profibus & profisafe
•Alternative use of all radiotechnologies like Bluetooth, WLAN, pWLAN, DECT, 868Mhz,WirelessHART (under development),GSM/GPRS
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January to July 2008 uptime
Over 26000 movementswithout buserror
Expresslift in Kufstein / Austria
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Waste water plant in Krefeld
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Surface mining by Teutonia AG in Hannover :Wireless Profisafe connection exit belt to digger
Funkverbindung mit 2,4GHz FHSS Bluetooth über 70m
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Wireless Profibus / Profinet
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Wireless Profibus / Profinet
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Wireless Profinet / Profibus
32ms profinet reductionratio
Profinet & WLAN Profibus &Dataeagle
3ms profibus cycletime
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Need of coexistence management for high avalible radio communication links
Coexistence mangement is a housekeeping work for the enduser!
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Coexistence management
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Results
There is not a unique radio technology avalible on the market, there are depending on the application practical or no practical
Wireless Profibus & Profinet yes but 802.11 b/g WLAN is not a good standard
using permanent coexistence management, there are good experience in long term application
Keep in mind: “No Wires” doesn´t mean “no Problems!”
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Vielen Dank für Ihr Interesse
Weitere Informationen
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