Laser units often provide a rather simple option to control them over DMX512: An integrated chip on the control board of the laser unit has pre-programmed patterns, that then can be selected over DMX. However, the options are very limited and normally the user cannot put own patterns on this chip.
Normally there is no professional operation of lasers through DMX possible (except units with SD-Card).
To have a very versatile control over laser systems via DMX, we recommend to use a professional control software and then remotely control the software via DMX - not the projector directly. With having the software in between, the control is very versatile and provides a multitude of functions. You can put your own logos, texts and patterns and have all the professional features that the software provides. DMX remote control works with Phoenix LIVE (and DMX-Adaptor) and Pangolin Quickshow (with additional external DMX->USB interface)
Entry-level laser projectors without computer control option are not meant for professional use.