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PLC and MODEM interface to achieve remote communication and control

  • 2013-09-17
  • 107.6KB
  • Points it Requires : 2

This paper introduces the method of connecting S7-226 PLC with MODEM modem to conduct remote data query control and remote alarm through mobile phone and pager, and introduces the specific hardware, connection cable and PLC communication software design method in detail. This method has been successfully applied in the unmanned integrated automation system of small hydropower station. Keywords: Siemens PLC; modem; communication

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