Does it make any difference what tag type you select (Int2, Int4, Boolean) when you are using a ControlLogix or CompactLogix? I have a lot of tags set up as Int4 even though the path points to a boolean data type and they all seem to work fine. Does this cause any extra overhead or does it matter at all? Should I go back and set the tag data type properly?
Ultimately it shouldn’t really matter. The data types of SQLTags don’t get sent to the drivers, they’re only used for converting the data provided by the OPC server to what you want in the tag environment.
In terms of efficiency, etc., it really shouldn’t have much of an impact.