pick & place machine

Hi All

My name is marcel. I am new to this forum but not to EMC
I already build two machines that run of EMC
I am now building a pick and place machine for placing SM electronic components.
I don’t know much about how the G codes work, as I rely on a Cad-Cam program and EMC to do it all. The problem with a P/P machine is you need to pick a component like a tool change location except you have many such locations. All the picking locations will have a different Z-axis setting and when at the bottom it must switch the vacuum on to pick the component up. Could these locations and its functions be kept inside the EMC program or will you have to program it as part of your G code every time?