Hello Sasko,
You'll get lot of useful material on PM Overview like few listed below, when you search with different strings in Google. These give the fundamental aspects of total module which is necessary.
Plant Maintenance Overview (pdf)
PM Configuration Overview(pdf)
For learning manuals you need to get books:
PLM300 - Overall idea pf PM
For detailed learning manuals PLM305,PLM310,PLM310,PLM315,PLM320 can be referred.
(These will not be available on net)
Good luck
KJogeswaraRao





