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The next message sent by the client is "OpenSecureChannel message". It is used to establish a communication channel to exchange data. In this message, the client and server agree on what type of encrypting and signing mode will be used (either "sign and encrypt" or "encrypt" only). OPCUA client in the D2000 System supports only unencrypted mode.
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From this moment, the server informs the client about the changes in the monitored objects by
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- Simatic S-7 OPC UA Server
- Bernecker PLC embedded OPC UA Server
- Zenon OPC UA Server
Forced disconnection: If all stations on the line are in the simulation mode or the communication is stopped for them, the line will be disconnected (the communication socket will be closed). If the simulation is disabled for at least one station and the communication is not stopped for it (the Parameters tab of the Station type object), the line will be connected again.
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