As far as I know, there is only one spindle and the dual table is only for changing the workpiece.
Basically, translated to Plant Simulation, inside your CP8000 you have one SingleProc and a Buffer. The total number of MUs here is no more than 2 (the capacity of the table).
You can use simple entrance and exit controls to lock/unlock the entrances to the machine. If the input buffer outside the machine is seperate from its output buffer, you can model it as a sequential process. I have made a small example: