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Appendix II: ARC Communication
Formats
Note: To comply with EN50131 you must fit a
communications module.
Fast Format
Fast Format is the format most widely used in the UK.
When using the Fast Format, each message transmitted
to the ARC consists of the following:
A 4,5 or 6-digit account number.
8 channels of data. Each channel communicates the
status of an output, as programmed using the ”Fast
Format Channels” option (see page 63 ). The value of
the channel can be:
1 = new alarm and not previously reported
2 = status of output is open/unset
3 = alarm restored and not previously reported
4 = status of output is closed/set
5 = not in alarm
6 = in alarm but previously reported
A test signal.
Contact ID
The Contact ID format transmits data from the event log
to the Alarm Receiving Centre (ARC). Examples of
messages in the Contact ID format are:
Example 1 - 1234 18 1137 01 015 2
1234 is the account number, as specified in Account
Numbers option (page 63).
18 is the message type used to identify the message
as Contact ID.
1137 is the event qualifier for a new event (1),
followed by the event code for a system tamper alarm
(137).
01 is the partition number.
015 is the zone number.
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