Question
Assalaamalaikum
What is Mukaam and how many types are there and what is the difference betweem them?
JazakAllhukhairan

Answer
Wa alaikum assalaam wa rahmatullahi wa barakatuh
Maqaamaat are musical scales and are not found in the the study of tajweed of the early predecessors. 
Please see the following link for a detailed explanation:
http://www.abouttajweed.com/kb/entry/31/