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Version: v4 (Stable)

Prerequisites

To establish communication between Alert and an OPC UA server, the following requirements must be met.

Network​

  • Alert and the OPC UA server must be able to communicate over the network.
  • The TCP port specified in the OPC UA URL must be open on all firewalls between Alert and the server.

Example: for the URL opc.tcp://OPC_UA_SERVER:51510/UA/DemoServer, port 51510 must be open.

Alert supports an unlimited number of simultaneous OPC UA server connections.

OPC UA Server​

Transport and Security​

The OPC UA server must support:

ParameterSupported values
Transport modeUA-TCP, UA-SC, UA-Binary
Security policyNone, Basic128Rsa15, Basic256, Basic256Sha256
AuthenticationAnonymous, UserName
CertificateSelf-signed accepted

Supported Tag Types​

Alert can read the following OPC UA data types:

Boolean, Byte, SByte, UInt16, Int16, UInt32, Int32, Float, Double, String, ByteString, arrays (single mode)

Data Management​

FeatureImplementation
Data qualityTracked per tag
TimestampServer timestamp recorded
WriteSafe Write
MonitoringDataChange Subscriber