OPC DA (Classic OPC) Client Connection        

Connection Active

Shows whether the connection is active or not. If not, you cannot register items and there will be no connection to the PLC. This feature allows you to disable a connection temporarily without deleting it so that you can re-enable it later without having to enter all parameters again.

Write allowed

You can disable the Write function.

Host name

If a computer name is given the OPC server will be used from that machine. For local OPC servers leave the field empty, or use the reserved name "localhost".

Server name

The server name can be explored - press the ">>" button for the dialog Explore OPC DA Servers. But the OPC server name can be entered by hand.

Group update rate

The group rate defines the minimum time the OPC server will return changed values.

Element separator

Most servers use a dot for separator. Few servers differ.

If you can browse and then a data point can not be added, it could be due to the separator.

In the logger window, a corresponding message is then displayed which separator is probably the right one.

If the field is empty, the point is used as separator.

Event settings

- Automatic Refresh: Default - The Refresh is triggered in the new connection establish and when adding/changing an event instance. The UA server is always answered from the cache.

- Forwarded Refresh: If a refresh is triggered via OPC UA server and none has run in the last 30 minutes, then the Refresh is also triggered via Classic AE Client, otherwise not. The UA server gets the answer from the cache.

- No Refresh - switched off, refresh never comes. The UA server always gets the answer from the cache.