PWE for this control is in parameter 0000 and is labeled PWE. The alarm you
are getting is NOT a Fanuc alarm however. It is being generated by the
machine tool builder's ladder that is running in the control. Your best bet
is to get the ladder printout which will provide symbol and comment data for
the logic (assuming you have one!), view the ladder dynamically on the
machine and trace backwards from the alarm bit that is actuating the message
until you find the element(s) that are generating the alarm.
Typically, the OEM provides additional machine specific manuals that detail
these types of alarm messages, their causes, and how to correct them.