Which communication driver has to be use for a MPI communication in Movicon?

The right communication driver is the "VIPA-Embedded-MPI"-driver.

You can find it here:
Real Time DB -> Comm.Drivers -> (right mouse click) -> Add New Comm.Driver... -> open the "VIPA" folder in the list -> mark the "VIPA Embedded MPI" communication driver

Only the MPI address of the controller and the touch panel have to be set in the driver attributes.

NOTE:
The communication driver "S7-MPI PC Adapter" is only needed in combination with the VIPA Green cable.
For a standard MPI-communication this driver is not suitable.