Parameter 59: 4X2 With Parity - Honeywell FBII CP-220A Hookup And Installation Instructions

REMEMBER!
To leave the Programming
Mode at any time, press
the Esc key. Doing so will
return the CP-220A to its
normal operating mode.
Programming changes will
be stored automatically.
PARAMETER 59:
4x2 With Parity
Programming Procedures:
After entering PARAMETER 58, [FORMAT DATE MONTH/DAY] will be
displayed. Use the NEXT key to toggle between placing the month first (the
default) or [DAY/MONTH], the alternative.
Advancing to Next Parameter:
After programming PARAMETER 58, press the N key to advance to
PARAMETER 59 – the next parameter in Category A.
The CP-220A displays the parameter just programmed ([PARAMETER
NUMBER 58]) with its first digit flashing, indicating its request for the next
parameter number.
You can reach PARAMETER 59 in one of several ways. Press either:
• 5 then 9 , or
• then 9 , or
• the
NOTE: When the
immediately – not its number.
SLOT 1 4X2 AT 40PPS MM/DD/YY HH:MM:SS
Background:
The CP-220A is capable of receiving and processing many popular alarm
Reporting Formats (see Appendix B). One such format, known as 4x2 (four
by two) with parity, is quite popular, and contains:
• a four-digit Account Number
• a one-digit Alarm (Event) C
• a one-digit Zone I.D.
Also sent along with the message (but not displayed or printed) is a single
parity digit containing a number that is derived through a calculation based
on the 6 characters that precede it. When such a 4x2 message is received,
the CP-220A performs the same calculation on the first 6 digits and
compares the result with what was sent as the message's 7th (parity) digit.
If they are identical, it's quite likely that the message was received
accurately. Using this parity technique allows the receiver to process
messages faster because, unlike the standard 4x2 report (which sends the
entire message twice and compares them with each other), the parity
technique requires only one round to process the data and confirm its
accuracy, rather than two. The 4x2 (with parity) format may be transmitted
using rotary pulses at 40 pps (pulses per second).
CP-220A Central Station Receiver Section 2: Programming the CP-220A Page 2-53
Hook-Up and Installation Manual
key three times
is used, the name of the next parameter appears