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 customers 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 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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