Connectivity Framework
7 : Connectivity Standards
Fieldbuses implement parts of the connectivity transport and framework functions . None satisfies all of the connectivity core standards criteria ( see section 3.4 ). However , they are well deployed with extensive experience . Most of these protocols support the following types of communication :
• Management : Request-Reply pattern , with explicit schemas , for example a RESTful architectural style , used for resource lifecycle communication for management and status of the device / thing
• Operational : Peer-to-peer publish-subscribe pattern , with implicit schemas , often timeseries , used for data streaming of key operational data used for sense-control-actuate control loop processing that maintains the system ’ s operational integrity .
This suggests that the core connectivity standards should support both forms of data exchange patterns to support the range of functions in the overlying applications .
Most automation and control applications in operations and being deployed for the foreseeable future will rely upon a Fieldbus-based ecosystem protocol . Most “ Industrial Internet ” applications will have to access data from these protocols to acquire data from and actuate decisions or insights into these protocols . Integration is important .
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