WebSockets provide a way for web browsers and cloud apps to talk directly to devices for automation and monitoring. A WebSockets create a two-way open communication channel. It wraps messages (according to various message schema, e.g. in ASN.1 notation) in web-friendly formats like JSON. This bypasses strict firewall rules without needing complex, heavy software.
WebSockets are used in many solutions like OPC UA, OpenADR, ... and soon in IEC 61850-8-3 (alternative for MMS).
How do WebSockets perform in a PLC environment where usually special industrial communication protocols are used? An interesting paper discusses this question:
"Latency Analysis of WebSocket and Industrial Protocols ..."
WebSockets are likely to becoming the future standardized web-based "carrier".
The Netherlands Distribution Service Operator have shown with a PoC (proof of concept, now used for the definition of IEC 61850-8-3) that standardized (!) WebSockets can exchange IEC 61850 standard(!) messages containing data values produced and consumed by the huge amount of standardized (!) IEC 61850 models, configured by a standardized configuration (!) language (SCL, IEC 61850-6), and encoded in a standard (!) JSON format.
Background information can be found in my video
Feedback on LinkedIn: "This presentation made everything much clearer! But seriously, using WebSockets as a transport for industrial protocols is a really good idea."
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