![]() ![]() These profiles make up a layer that lies on top of the base layer of OPC UA, which runs common services. For example, the OPC DA standard is an OPC UA DA profile. They are usually referred to collectively as OPC Classic or simply OPC. ![]() These specifications are OPC DA (Data Access), OPC AE (Alarms and Events), OPC Security, OPC Batch, OPC Command, OPC XML, OPC Data Exchange (DX), and OPC HAD (History Access Data). In OPC UA, OPC Classic specifications provide functional modules that can be queried ad hoc. In contrast to OPC UA, OPC Classic does not support dynamic information modeling, which allows manufacturers to define custom data models depending on the requirements of their industry. OPC UA implements cross-platform security based on the public key infrastructure (PKI) using industry standard x.509 digital certificates. This means security is ensured from the start of the data’s transmission, instead of being confirmed only when it reaches a network’s firewall. OPC UA enables data encryption at the data source, ensuring secure transmission without relying on network firewalls at the system’s core. OPC Classic does not have built-in security for access control, authentication, and encryption. OPC Classic, the predecessor of OPC UA, relies on Microsoft technologies while OPC UA is platform independent. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |