I realize you're post is very old and it was sad to see no one replies. I have searched tirelessly to find an answer as I'm having the same issue. Purchased two DotzTpar systems and they willot talk to one another. My menu or manual does not say 'personality' it does say to set one as slave and then set other to master following directions on page 10. Problem is that there is no instructions on page 10 or anywhere about setting master. It's not even one of the menu options! Called Adj and after a 20 minute hold, they had me do all the basics. Tried 10 different DMX cables and none worked so nota cable issue. Resets, switching master/slave around, etc...tried it all and they won't communicate with one another. Whichever is slave is alway off. ADJ gave me a direct number formorrhelp but no one has answered or called back. Sorry I don't have an answer for you years later