Development and implementation of a modbus based wireless air protocol

[摘要] ENGLISH ABSTRACT:The recent performance improvements of wireless communication systems are presentingpossibilites for the use of wireless networks for industrial applications, which typicallyimpose severe restrictions in terms of response time and flexibility.Traditionally most of the industrial protocols employ cable connections, which have limitationsin terms of flexibility and development oportunities. The industrial protocol usedfor this project, is the Modbus protocol. This protocol is developed and implemented on awireless environment by using data radio modems. The Modbus protocol is a master/slaveprotocol which provides an industry standard for industrial data transfer.A Modbus driver is designed for radio networks, so that it can function with differentPLCs and SCADA packages, supporting Modbus protocol. This enables control andmonitoring to be excercised over a long distance, and enables control equipment to beplaced as required and not with particular wiring restrictions.

[发布机构] Stellenbosch University