OPC UA is a platform-neutral standard that allows systems and devices to communicate and exchange messages over multiple types of networks. It defines a set of services that servers would implement and clients request. The services are based on an authenticated session and a secure channel. Three transport protocols are defined: OPC UA TCP, SOAP/HTTP, …
Before the OPC era, industrial applications had to carry the burden of maintaining their own communication drivers. The OPC standard provided a common method for accessing data. Consequently, OPC client applications can access all sorts of devices such as PLC, DCS, RTU…etc, using the same interfaces. OPC classic is based on a Microsoft interprocess communications standard called …
The Industrial Internet of Things (IIoT) involves an intensive data exchange and a certain level of interoperability between different kind of devices. The data can be collected locally or sent to cloud-based applications in order to be aggregated, stored, and analyzed. Due to the heterogeneous nature of the environment, some communication standards need to be established …
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