A look at Fig. 4 reveals that the original hope arising from the fieldbus standardization disaster, i.e., that Ethernet could be the basis for a unique industrial communication solution, was futile. In fact, the situation has not changed too much compared with the heterogeneity of the traditional fieldbus systems. Interoperability between different industrial Ethernet solutions is not possible in a direct way. Nevertheless, as many industrial Ethernet solutions were developed by the same companies who already have fieldbus systems on the market, care was taken to allow for backward compatibility and cooperation between the “old” fieldbuses and “new” Ethernet installations. This was again done to increase market acceptance and to provide
a migration path for the steady replacement of the fieldbus systems by industrial Ethernet.
A look at Fig. 4 reveals that the original hope arising from the fieldbus standardization disaster, i.e., that Ethernet could be the basis for a unique industrial communication solution, was futile. In fact, the situation has not changed too much compared with the heterogeneity of the traditional fieldbus systems. Interoperability between different industrial Ethernet solutions is not possible in a direct way. Nevertheless, as many industrial Ethernet solutions were developed by the same companies who already have fieldbus systems on the market, care was taken to allow for backward compatibility and cooperation between the “old” fieldbuses and “new” Ethernet installations. This was again done to increase market acceptance and to providea migration path for the steady replacement of the fieldbus systems by industrial Ethernet.
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