Help with designing a system that will allow a code to be inputted during a five second window

I need to design a system which allows a user to input a code combination during a five second window a correct input code during this window will generate a binary output of 1 to indicate that the lock is open, and at all other times and for any incorect code the output of the system will be zero indicating that the lock is closed. The system must be designed to allow a pre-set combination to be specified and easily changed. The system must display the time count during operation, noting that only three attempts for putting the code are allowed. On a fourth unauthorised attempt another application must set off an alarm. I have the
combination lock functioning but am having
difficulties with the five second timer and integrating the system as a whole. Any help would be greatly appreciated.

Mazza,
Try this VI out. It returns a boolean instead of an integer, but this is really the same thing from what you are talking about.
You would use this VI as a subVI. It will pop up and allow user data entry. It passes the boolean out of it to see if the login was successful or not. You could also change things so that the password comparison (password in my case) is an input to the subVI as well.
Randy Hoskin
Applications Engineer
National Instruments
http://www.ni.com/ask
Attachments:
Timed_login_panel.vi ‏29 KB

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