Operation Mode
Operator's Handbook, AutroSafe Interactive Fire Alarm System, Release 3, ASAFE-FO/FE Rev. E, 021105,
Autronica Fire and Security AS
Page 22
3.14.2 Point Disablements
A general rule is that a Point may be disabled by one or more
disablement sources simultaneously. To be enabled, the Point must
be enabled from all these disablement sources.
Example:
A Point is disabled from a Zone (Detection Zone disable command
issued from an Operator Panel) and from a Disable Input Unit. For the
Point to become enabled, a DZ enable command must be issued from
the Operator Panel and the Restore button on the Disable Input Unit
must be pressed.
Exceptions to this general rule is as follows:
•
Individual
enablements will override and remove all other
disablements but Loop disablements. The reason for this is that an
individual Point disablement should be regarded as a sort of
service command used in exceptional circumstances, disabling of
Points is usually done via its Detection Zone.
•
Master Zone
enablements will override and remove all Master
Zone, Zone and Disablement Input Unit disablements.
3.14.3 Other Unit Disablements
Other units (than Points) are only affected by
Individual
and
Loop
disablements.
Note that in contrast to Point disablements, there is no memory in the
system in conjunction with
Loop
disable / enable operations: When a
loop is disabled and then enabled, any disablements which may have
existed before the loop disable will be lost. In other words,
all
loop
units (except Points which have this memory function, see above) will
be enabled when enabling the corresponding loop.
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