Automated systems require sample microplates and consumables plates to be delivered into the robot work area as required.
see the paa supplied automate.it fifo stacker (left)
There are multiple ways of achieving this:
stack of plates (click to see example)
rack of plates (click to see example)
hotel (LiCONiC/Thermo Cytomat range, see storage)
Your choice of the above depends on how the plates are to be used and the budget available.