Joined: 31 Mar 2005 Posts: 436 Location: chennai, India
FSET specifies that the modified data tag (MDT) for this field should be set when the field is sent to a terminal.
Specification of FSET causes the 3270 to treat the field as though it has been modified. On a subsequent read from the terminal, this field is read, whether or not it has been modified. The MDT remains set until the field is rewritten without ATTRB=FSET, or until an output mapping request causes the MDT to be reset.