EUROMAP is an association of plastics and rubber machinery manufacturers based in Austria, France, Germany, Italy, Luxembourg, the Netherlands, Spain, Switzerland, Turkey and the United Kingdom. This group has produced a comprehensive set of Technical Recommendations for its members to follow.
The EUROMAP technical committee has recommended implementation of realtime Ethernet communications for peripheral devices. Document 75-2, for example, defines network architecture and specifications for line topology (daisy chain), ring topology, and star topology.
If you are thinking about network topology and communication protocols for your project, the EUROMAP Technical Recommendations can provide valuable examples of best practices as determined by a group of leading-edge industrial machinery companies.