Configuration of the OPC UA® server with PLCnext Engineer You can configure the OPC UA® server with the software PLCnext Engineer. For more information about the configuration options refer to the section OPC UA Server in the Online Help of PLCnext Engineer. You can find the PLCnext Engineer Online Help within the software at the Help →… Read More
OPC UA client Available from 2023.0 LTS The OPC UA client supports subscribing variables from connected servers and writing changes of local variables to connected servers. The PLCnext Control device establishes the connection automatically as soon as the server is available. When the connection gets lost, the OPC UA… Read More
OPC UA features Here’s an overview to the OPC UA features and when they were implemented into PLCnext Technology: OPC UA® Server Firmware version 2019.0 LTS 2020.0 LTS 2021.0 LTS 2022.0 LTS 2023.0 LTS 2024.0 LTS 2024.6… Read More
OPC UA client XML schema Schema file The connection configuration is defined in XML files. It is based on the standard UA schema for data types which can be found here. It is formally defined in this schemathis schema. … Read More
OPC UA discovery/connection options Note: The OPC UA client and server use the OpenSSL library to validate X.509 certificates using the OpenSSL flag X509_V_FLAG_X509_STRICT. As firmware 2024.0 LTS is updated to OpenSSL 3.0, the X.509 certificate validation became more strict, especially for non self-signed certificates. This may cause the server to return… Read More
Global Data Space The GlobalDataSpace namespace All programs and variables from the IEC 61131 context are displayed in the http://phoenixcontact.com/OpcUA/PLCnext/GlobalDataSpace/ namespace. Via the namespace, the corresponding NamespaceIndex can be determined from the NamespaceArray. The NamespaceIndex is a numeric value for identification of the namespace. It is saved in the… Read More
Quickstart OPC UA server configuration Tutorial video Note: Tutorial videos are embedded from the Phoenix Contact Technical Support YouTube channel. With playing an embedded YouTube video in this platform, you accept the YouTube Terms & Conditions. Even showing the video previews on this page depends on your personal settings. To… Read More
OPC UA Server On request, an OPC UA® server provides an OPC UA® client with process data and variable values from a running application. The PLCnext Control devices contain an embedded OPC UA® server (eUA). In addition to the runtime, it is integrated in the controller. It enables access to components, programs, function blocks, structures and… Read More
Introduction to information models The PLCnext Technology eUA server provides these IEC 62541-5 compliant information models: External information models Alarms and conditions Device information Historical data access File access Global Data Space Common OPC UA terminology This topic describes some common OPC UA… Read More
OPC UA alarms and conditions Alarms You can exchange alarm and status messages between a program and the eUA server. For all details, please refer to the Alarms via OPC UA section. • Published/reviewed: 2026-09-28 ✺ Revision 102 • … Read More
