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Profibus communication and propriety of Siemens automation, profibus communication need GSD file for its components to integrate with the current control system. Maximum speed of profibus communication is only upto MBPs. The profibus cable is more expensive, profibus distance extender is more expensive, profibus works in master slave configuration, so if master fails all the slave connected to the slave will not respond.
Ethernet can be easily managed and can be connected easily using cheap industrial switched, can be communicated using wireless. Ethernet CAT6 cable is much cheaper then the profibus cable.
