Protool enable input field with password

I have a Siemens display (TP270 10" touch) programmed with Protool Pro V6.0 SP3. I want a input field to be invissible when the password level is not ok. When the password level is high enough I want to show the input field.

In effect only service people we see and have the option to change this parameter. Is this possible in protool? I know I can enable input fields on a tag. But I don't know how to get the current password level in a tag?

Any tips?

Edit: Sorry I already found it. write password to tag....

It must be Friday...time for a beer...

Even easier with WinCCFlex !!
Enjoy the beer.

Hey guys im new here and to Siemens well right now im trying to connect an outside device to a S7 CPU 315-2 DP to send ASCII code. I guess i need a serial module in the PLC rack namely a CP 340 or do i need a different one and can i talk to two different devices through just one serial module??????????????