Configure a DDE/SuiteLink topic object

Add a topic to your DDE or SuiteLink object

1. Select the new data source object, right-click and select Add Topic Connection.

   • A new object is created in the hierarchy tree and is named New_Topic_000 by default (in "edit mode"). Rename it to match the Topic name as defined in your DDE or SuiteLink data source to be connected. You are allowed to add up to 100 new topic objects.

     The New_Topic_000 Parameters configuration view (right pane) is displayed.

2. Configure the new Topic object according to the following option definitions:

   • Device Group Name: Name of the topic that DDE or SuiteLink clients of Gateway Communication Driver connect to in order to access items at this topic in the data source. Default value is the concatenation of the DDE or SuiteLink object’s name and the Topic object’s name (this cannot be edited).

   • Read Only: Check this box to make all items connected through this topic read only. This qualification is in addition to any read-only condition the DDE or SuiteLink data source imposes. Unchecking this box only removes Gateway Communication Driver-imposed read-only qualifications. In other words, items inherently read-only in the data source remain so. Default value is unchecked.

   • Topic Name: Name of the topic in the DDE/SuiteLink data source. Default value is the name of the topic node in the hierarchy. You can change this name by checking the Change Topic Name check box.

   • Change Topic Name: Check this box to enable the Topic Name box so as to change the topic name. Changing the text in the Topic Name box has no effect on the name of the topic node in the hierarchy. Default value is unchecked.

Topic objects, which are identical between DDE and SuiteLink data sources, model the behavior of DDE and SuiteLink servers.

Note: Each group or topic must be uniquely named for the data source associated with it. That is, the topic object name or its Topic Name parameter should exactly match a topic defined in the DDE/SuiteLink server data source in a case-insensitive manner.