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Door Objects for Access Control
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Flexibility of Door Objects

One solution to the high cost of microcode changes is to utilize an "engine" that has field adaptable code. The process control and Supervisory Control and Data Acquisition (SCADA) ndustries have developed around this format, and the building management industry is generally heading in this direction. A relatively generic product "engine" would be provided to the installing contractor.Microsoft Operating Systems:

Libraries of functionality would also be provided to the contractor to facilitate the implementation work. There would be no need to try to make one solution fit all cases if the generic engine allows the installing contractor to modify the microcode to fit the customer’s physical and operational needs. This is the basis for a "door object" in the access control industry.

Systems are typically installed with sets of similar doors. If, on a site, there are several buildings, typically all of the lobbies will be configured in the same way. The same is true of all of the access controlled perimeter non-lobby doors and other groups of portal types for the buildings. Included in the list are alarmed doors that may have local sounders or other attributes. The timers will be different for each type of door, but the initial default time may logically be the same. Even with all the similarity, there is still a need to be able to uniquely adjust virtually every timer in the system. One example is the case where one door that is functionally similar to another may architecturally need to have the reader placed farther from the door.  In this case, the unlocking should be set to a longer time.  Each set of similar doors will be a door object.  The timers within the object will have a default setting, and each individual door will be able to either use the default or be adjusted to suit the unique conditions.

Without making unrecognizable changes to the access control products that exist today, it would be possible to format the systems with door objects. Initial libraries can be shipped with the systems. These could include:

  • a simple card-in/free-exit door with a door contact and a REX
  • a card-in/free-exit door as above but with the addition of a "please close the door" pre-held alarm
  • a card-in/free-exit door as above with an "DOOR ALARMED" light and reader lockout function for night operation
  • a card-in/card-out door with a door contact

The list will be quite long. The ability to create new objects to add to the initial set will be central to the success of this process. Possibly, some of the library of objects could be sold at additional cost. A jetway door and a mantrap are two specialized objects that come to mind.

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