Paper abstract bibtex
This white paper compares the two communication technologies: Smart Energy Profile (SEP) 2.0 and IEC 62541 OPC Unified Architecture (UA) as well as provides an introduction to OPC UA. SEP 2.0, was developed for LAN communication and employs a REST protocol style. OPC UA was developed for LAN or WAN communication and employs a “Stateful Communication” protocol style. Stateless REST servers don’t store communication/protocol information for clients for the duration of a conversation 1 while stateful servers do. Both approaches can work and both have advantages and disadvantages. Whether stateless or stateful servers should be used depends on the use case.