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: 2026-02-13 ☃ Revision 089 • … Read More
eUA Client diagnostics Available from firmware version 2024.6 Overview Diagnostic information of the eUA Client is accessible via the eUA Server. The eUA Client object can be found in the server address space by the following path: Root → Objects → DeviceSet → Controller type (for… Read More
OPC UA® file access 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 watch YouTube… Read More
Device-specific OPC UA® settings and limitations OPC UA server The PLCnext Technology controllers have the following device-specific default OPC UA® settings: Target Maximum number of sessions Minimum supported sample rate Available sample rates AXC F 1152 3 100 100, 250, 500, 1000, 2000, 5000 AXC F 2152… Read More
How to integrate an external information model Note: This is an advanced topic which requires knowledge about OPC UA and XML file generation. In addition, some understanding of the tools UaExpert and UaModeler is required. This guide is based on the Process Automation Device Information Model (PA-DIM), a companion… Read More
OPC UA secure channel The eUA server supports client communication over encrypted endpoints by default. To configure the endpoints, refer to OPC UA endpoint configuration. Client application authentication The eUA server supports client certificate authentication over secure endpoints by default. The certificates of OPC UA® clients… Read More
Overview to OPC UA® with PLCnext Technology OPC Unified Architecture (UA) is a standardized protocol for industrial IT and OT communication. The following areas of OPC UA are integrated in PLCnext Technology and can be used in your application. OPC UA Server On request, an OPC UA® server provides an OPC UA® client… Read More
OPC UA® monitored item and subscription An OPC UA® client can subscribe to a list of variables that are then monitored for changes by the GDS. The variables are checked for changes at a defined interval. When subscribing to a variable, the client can define a sample rate, which is then served by… Read More
Module configuration of the OPC UA client The OPC UA client can be configured in PLCnext Engineer from version 2023.3. We recommend to use PLCnext Engineer for the configuration (see also Tutorial – OPC UA setup for PLCnext Control). The configuration can also be performed using an additional… Read More
