Yes, it is possible.
In order to access tags from scripts, such as reading/writing tags, you must AddTag them beforehand.
AddTag tags can be read and written by calling methods such as GetVal and WriteVal.
For more information on reading into tags from scripts, see
here, and for more information on writing to tags, see
here.
For more details on reading/writing to multiple tags from a script in bulk, see
here for a sample.
*)The link is to the description of "FA-Panel", but the contents are common to all products.
*)The relevant scripts in this FAQ are "
Browser Script" and "
Script Action (SC2)".