I don't know any online resource that have this content.
A first stop would be the PDL2 programming manual, easily found on internet, but can be a little bit overwhelming for first time users.
Besides COMAU Robot Programming, You also can search for PDL2 programming, where PDL2 is the programming language used by COMAU robots.
Sometime ago, COMAU Robotics was providing free licenses of RoboShop Lite, a simpler version of their simulator. I don't know if they still do this, but You can try to contact You local COMAU supplier and ask for it.