OPC is a client/server protocol. The server has a list of data points (normally in a tree structure) that it provides. A client can connect to a server and pick a set of data points it wishes to use.

As with all industries, Building Automation (BA) has gone through, and continues to go through, changes in what data sharing capabilities are expected of vendors’ solutions. Multi-vendor ...

In the rapidly-evolving space of Industrial IoT (IIoT), we are seeing some growth in understanding about what makes a good IIoT protocol. Several years ago there was talk about OPC UA serving as an ...

OPC UA is often described as a protocol, but that misses the point. At its core, OPC UA is an information model. The protocol exists mainly to move that model around safely and consistently. If you've ...

Connect your PHP application directly to industrial PLCs, SCADA systems, sensors, historians, and IoT devices using the OPC UA standard — without any C/C++ extensions, HTTP gateways, or middleware in ...

Abstract: With the rapid development of information and automatic control technology, more and more industrial control system(ICS) like SCADA, is interconnected with Ethernet and directly connected to ...

Researchers discovered 17 zero-day vulnerabilities in a popular framework for secure data transfer between clients and servers in industrial systems — OPC-UA — and applications that use that framework ...

In this paper, we present the integration of MQTT for Sensor Networks (MQTT-SN) into OPC Unified Architecture (OPC UA) as a novel publish/subscribe (PubSub) protocol binding in order to enhance the ...