What Happens to the Process When the Devices Fails?

ISA100.11a needs further refinement in that security and issues such as redundancy are not defined adequately.

I am presently a participant on IEEE P2030 TF3 for the Smart Grid. ISA100.11a and systems of this type are going to have problems for use in power applications. I have spent some time with IEEE members who are quite a smart group, but they need input from end users with real-world experience in industrial plants, so they can appreciate the criticality of use.

I am currently reviewing proposed use cases, in which it becomes apparent that the developers of them lack enough information to be able to understand their criticality. I have asked the simple question, "What happens to the process when the devices fails?" There is generally a gasp when members come to the realization that there is a $500-million plant that may rely on the data flowing through this device, and there is no redundant path should the device fail.

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