Intefacing the Text display

Hi there,

I have the Text display which have Rs-485 and RS 232 interface.I need to connect this with CPU 315-2DP.
1)Which card i need for this?
2)How to display the desired messages in it?

Also I'am using the WinCC flexible advanced 2005 for the HMI's MP370 and TP170B. I want to protect some screens access with password.
Problem is i have configured the a button with password which is working as desired in simulation, but does not work in HMI !!
any suggestions??

Thanks,
Manmeet

what text panel exactly? cpu 315-2dp has only MPI and Profibus DP Interface... both are 485 type