OPC UA Server Installation Requirements

This topic describes the hardware and software requirements for a computer that will host an OPC UA Server.

Before you install Plant SCADA, it is recommended that you install the latest updates from Microsoft® for your operating system and system software.

It is also recommended that you install the OPC UA Server on a dedicated computer.

Note: The OPC UA server requires the purchase of a specific license. Please contact your Plant SCADA distributor for more information.

Hardware Requirements

The hardware requirements for a OPC UA Server are as follows:

• CPU PassMark®: > 4000 pts

• RAM: 16 GB

• Changes per second: < 25,000

  OPC UA in Plant SCADA supports a minimum sampling rate of 500 milliseconds, which means it can capture value changes for a tag at one second interval.

  A higher number of changes per second can be supported, but this will require additional memory and CPU performance.

• Subscribed tags: < 100,000

• Maximum OPC UA clients in the system: < 10

  Adding each OPC UA client to the connected OPC UA server increases the CPU and memory usage on both the OPC UA server and the I/O sever.

  Note:
  • Several systems with a large number of tags arranged in a flat architecture, or a hierarchy with many child nodes, will significantly impact the browse performance of a connected OPC UA client.
  • Plant SCADA now includes a connectivity service that manages tag subscriptions for the OPC UA Server and Industrial Graphics Server. This places an additional load on your I/O servers, particularly if a subscribed tag also specifies a property or extension. If this impacts I/O performance, you should consider distributing your I/O servers across a number of computers. You can also disable support for properties and extensions with the parameter [IOServer]DisableConnectivityPropertiesAndExtensions.

Operating System Requirements

The following operating systems are supported (64-bit only):

• Windows 11 21H2 (or later)

• Windows 10 21H2 (or later)

• Windows 10 LTSC 1607 (or later)

• Windows Server 2016

• Windows Server 2019

• Windows Server 2022

Microsoft .NET Framework 4.8 is required. It will be installed by Plant SCADA if not detected.

When .NET installation is complete, you may be prompted to restart your computer. If this occurs, you should initiate a restart before you continue.

Note: The OPC UA Server does not support browse filtering by OPC UA Clients.

See Also

OPC UA Server Installation Procedure

Use Configurator to Set Up an OPC UA Server

Confirm the Settings for an OPC UA Server