Variables of the OPCUA client driver do not have the the INVALID status set when the OPCUA server returns a value with a bad quality.

• Related Articles

• FAQ: How can I monitor and react on the communication status of my devices with zenon?

  Data quality is very important to the integrity of a HMI or SCADA system. As such, zenon has numerous ways to monitor the communication status of different devices within your automation environment. Here are some options that you can use in your ...

• Variables from the OPCUA client driver that have a bad statuscode on startup will never get a value.

  Summary If the value of a OPC UA variable has a bad status code when OPCUA client driver starts, the variable will never get a valid value in the runtime, even when variable gets a good statuscode in the OPCUA server. Description If the value of a ...

• When a variable in the OPCUA server has a bad quality (no value), the OPCUA client driver does not offer this variable in the list of variables after online import in the editor.

  Summary After online import in the editor for the OPCUA client driver, the list of variables does not contain variables that have bad quality and no value. When the variable value has a valid, the online import does correctly offer the variable in ...

• The OPCUA client driver sets variables INVALID in the runtime after 20 seconds with specific settings for publishing interval and MaxKeepAliveCount and no value changes in the OPCUA server.

  Summary When the OPCUA client driver uses settings with a publishing interval and a MaxKeepAliveCount that result in a value of more than 20 seconds, and the OPCUA server sends no value changes (publish responses) for all the variables in the ...

• Checklist: OPCDA Server

  Time estimate: 20 minutes Please go through all the points in the following checklist. If necessary, confirm with IT Department any information you cannot verify before contacting your local COPA-DATA Representative. Do NOT use DCOM in combination ...