Hi,

Trending can't be activated on a matrix parameter.

If alarm monitoring is activated then it is kind of possible to verify the different states of a cross point but that is not ideal as it will generate the needed alarms.

The best approach would be to have a driver modification to also write the values into a table and trend these values. There could be two possibilities for such table:

• Have a table with one row per output, one column is the output number (display key) and the other column is the input number to which it's connected to (trended parameter). This way you can request trending and see for every output to which input it was connected to. Downside is that it doesn't support m-to-n relations (multiple inputs cannot be connected to one output)
• Have a table with one row per cross point combination, one column is "<output number>  - <input number>" (display key) and the other column is the connection state  (connected or not, trended state). This way the status of a specific cross point can be verified. Downsides are that it's not possible to see for a certain output to what it was connected then instead and for a matrix of 1000 inputs and 1000 outputs that it would require a table with 1 million entries so that table would have to be limited to only the cross points that you're interested in