Communication

Which communication protocols does TwinCAT HMI support?

The TwinCAT HMI supports communication via ADS to TwinCAT systems and communication via OPC UA to OPC UA servers. In addition, the TwinCAT HMI servers can exchange data with each other via server-to-server communication.

A server extension offers further communication options.

How do I use the ADS extension?

You can configure the connection to TwinCAT systems in the ADS extension. You will find instructions on how to do this in the ADS chapter. The data points can then be used in TwinCAT HMI.

How do I use the OPC UA Client Extension?

In the OPC UA Client Extension you can configure connections to OPC UA Servers. Instructions can be found in the chapter OPC UA Client. The data points can then be used in TwinCAT HMI.

How can I check the connection status to my target system?

With the ADS extension and with the OPC UA client extension you can click on "Diagnosis" on the configuration page of the server. There you can view the current connection status.

I cannot establish a connection to my TwinCAT system. What can I do?

Check whether a route to TwinCAT exists. The TwinCAT system must be in Run mode and the PLC must be started.

I have transferred my project to the target server. Afterwards, no data points from the TwinCAT system are displayed. The data points were displayed on the engineering system. What could be the cause?

The following causes are possible:

  1. In the TwinCAT HMI Server, a distinction is made between local profiles and remote profiles. With a project publish, a remote profile (selected in the Publish dialog) is transferred to the target server. Check the connection settings of the ADS extension for the remote profile.
  2. There are not enough target licenses on the target server. One target license is required per TwinCAT system. Activate additional target licenses.

I cannot transfer my project with OPC-UA-Client-Extension to the target system. What could be the cause?

The OPC-UA-Client-Extension requires the license TF2110. Activate this license on the target system and run the project publish again.

Can a TwinCAT HMI server communicate with another TwinCAT HMI server?

TwinCAT HMI servers can communicate with each other via server-to-server communication.