GPS outdoor localisation for Profibus

Schildknecht AGwww.schildknecht.info

(Vorstand Dipl.Ing. Thomas Schildknecht)

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Global position System GPS

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Global Position System GPS for machine localisation

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Customer application requirements

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Principle

Landside fixed station Ferry 1 Profibus DP I/O

Ferry 1 GPS localisation

Ferry 6

Profibusslave: Fix station GPS referenz

Profibus DP I/O

Ferry 1 GPS localisation

Profibusslave: Dataeagle DiagnosticRadio connectRadio cycletime

Profibus

http://www.hecht-systeme.de/

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Closed control loop with wireless Profibuswith DATAEAGLE 3002

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 GPS for mobil localisation

Profibus DP Interface

GPS Antenna

Dataeagle variables:

latitude and longitudespeedGPS timedirection of movingtotal level over sea

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Measured accuracy vrom 23.12.2008 to 7.1.2009

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DATAEAGLE 3000 Wireless profibuskey 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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Alternatives for localisation

•Optical Link: not usable because of rain, snow, distance, different waterlevel

•RFID not usable because of distance , different waterlevel 2m

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Results

GPS works only in outdoor applications

GPS OEM modules are a lot on the market, but differ dramatically in realised accuracy

realised accuracy +/- 2m 99%

Don´t believe the marketing statements and datasheets of GPS OEM suppliers

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Thanks for listening

More information:

www.schildknecht.infoWireless Pavillion