If the Third Party OPC client - system connection cannot be established, you will be unable to connect to ClearSCADA from the Third Party OPC client application.
A connection may fail to establish if:
- There is a network failure. You will need to investigate your network infrastructure and repair any faults.
- A firewall is in place and is incorrectly configured. The firewall has to allow the OPC client to send data to the ClearSCADA server’s incoming port (5481 by default). It also has to allow the ClearSCADA server to send data via the server advise connection (which uses one of the ports in the OPC client’s Sockets range, 5500 to 5509 inclusive by default).
The Third Party OPC Client - system connection works in the same way as a ViewX - system except that it uses a different license and it requires Data Access components to be installed on the OPC client PC. As such, the firewall rules for Third Party OPC client - system connections are the same as those for ViewX - system connections. For more information, Firewall Settings for Client - System and Server Advise Connections.