Integration of Wireless Sensor Networks into Industrial Control Systems
In this paper, a prototype is developed, which can easily integrate a wireless sensor with programmable logic controllers (PLC) using Profinet. The low-cost embedded system Raspberry Pi was used to connect a wireless gateway with ‘ProfiNet’. A Wizziboard wireless sensor node, running the Dash7 communication protocol, periodically sends temperature and humidity data. This data is received at the UART of Raspberry Pi. A modified Snap7 library is used for communication between Raspberry Pi and SIMATIC Manager. The data is transferred using the Ethernet bus. The prototype is tested on SIMATIC Manager with a PLCSIM simulator installed on a PC. The Siemens HMI software Wincc flexible is used to monitor the state of PLC systems. Here, Wincc flexible is connected to the PLC over the TCP/IP protocol. SIMATIC Manager and Wincc flexible have been tested on a windows PC. Data logging is also implemented in the HMI software.
KeywordsWireless sensor Profinet Raspberry Pi gateway
The project COOL is supported by the German Federal Ministry for Economic Affairs and Energy on the basis of a decision by the German Bundestag.
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