ADEMCO High Speed
(ADEMCO Superfast)
While all of the formats discussed so far have the capability
of reporting alarms, troubles, and supervisory conditions –
while simultaneously identifying a system location or its
user – there is something left to be desired when it's
necessary to report extremely specific events that cannot be
categorized via common reporting methods. This is so
because the number of characters that can be used in the
reporting format limits the available combinations.
Reporting supervisory problems (e.g., low batteries) in
wireless transmitters, blown fuses in control panels, system
resets, or unauthorized attempts at programming are just a
few examples of special circumstances that cannot be easily
reported by conventional means. In the best of all possible
worlds, a reporting format should communicate
exactly
what's
required and leave no "gaps" or areas that may be subject to
interpretation. This is especially true for large installations
where several different detection methodologies (e.g.,
hardwire, wireless, and multiplex) are used, or where several
dozen users might have access to the system.
Because of improvements in the speed of reporting data through
the use of
tones
and
frequencies
(e.g., DTMF, FSK) rather than
pulses
, many more characters can be transmitted and decoded
during a given time interval, allowing for the creation of more
comprehensive protocols that satisfy the criteria mentioned
above. Such protocols have become known as
Contact I.D.
formats, each of which serves to provide a number of advantages
over the more basic formats, as summarized below:
•
very fast transmission speeds, allowing a detailed message to
be transmitted, received, and verified in just several seconds
•
a large number of event codes that allow the type of
incident to be uniquely and accurately identified
•
the ability to pinpoint an event (an alarm, trouble,
supervisory condition, bypass, etc.) to a specific sensor,
with capabilities exceeding the requirements of the system
•
the ability to report instances of several kinds of
openings and closings (e.g., regular and irregular) to
accommodate each of the system's users
There are several popular Contact I.D. formats that can be
processed by the CP-220A Receiver, each of which will be
covered in this section.
CP-220A Central Station Receiver Appendix B:
Page B-41
Hook-Up and Installation Manual
Communication Formats
