Select Device Configuration we can see the Energy meter or Device added and it's Tags and it's Scangroups .

Click on Tag link and Scangroup Link you can see that auto generate tags and scangroups respective to the device clicked.

Please Click on Tag link.

If you want to change any tag, Click on Edit link .

Example:  if you want to add multiplier, OPC Item Name, Item name, Set Alarm maximum value, min Value.

After Editing  tag please click on save button, Tag will be updated.

Please go back and click on Scan group Link.