Document No: LT0117
F4000 LCD Operator's Manual
System Description
Issue 2.38
19 April 2002
Page 2-27
2.5.9 NETWORK FAULT FINDING
When any network fault exists, F4000 annunciates a System Fault, signals fault to the
brigade and turns on the System Fault LED. An operator who uses the System Fault Recall
facility will then see in addition to any other faults "NetFlt" on Page 4 of the recall. The
Network Panel System Fault pages will show which panels also have Network faults and/or
are scan failed.
There are a number of faults that will turn on NetFlt and each generates a history/printer
event as per Section 6.8.3 Printer/History events.
To discover the cause of the network fault, recall the history via the LCD keypad or a laptop,
or review any event printouts. Network events have a time/date followed by "SID nnn",
where nnn is the SID of the remote panel that caused the event and will usually be between
1 and 254. A SID of 0 will most likely occur for the NET MSG DISCARDED event and
indicates that a broadcast message, i.e. a message that it is intended all panels receive, has
been discarded.
Most network faults are non-latching.
All network faults can be cleared by a System Fault Reset command. If the fault still exists,
then it will be re-annunciated.
2.5.10 NETWORK BELLS CONTROL
A V2.3xN F4000 can be configured to allow network bells control. The new functionality is
primarily of use by networks in New Zealand, but some features can be used by Australian
systems to achieve network-wide bells control.
Network Bells control consists of 2 functions:
(i)
Turning the bells ON, for alarms and Trial Evacuation (NZ).
(ii)
Silencing the bells on Network FIPs due to a Silence Alarms Activation (NZ) or
optionally by having the Bells Isolated at one or more FIPs on the Network.
If the local F4000 has Network Bells Control enabled, an unisolated MAF alarm at another
FIP on the Network will cause the local bells to turn ON, so long as the local bells are not
silenced or isolated.
If the local F4000 has Network Bells Control enabled, Trial Evacuation (NZ) at another FIP
on the Network will ALWAYS turn the local bells ON.
If the local F4000 has Network Bells Control enabled, reception of a Silence Alarms from
another FIP will always turns the bells OFF, unless they are ON because of a Trial
Evacuation.
In New Zealand, Silence Alarms is usually generated by operation of a switch.
For Australian and New Zealand operation, an F4000 can be configured to also send
Silence Alarms whenever the Local Bells are Isolated. Consequently, isolating the bells at
one FIP can silence all bells on the network.
