F4000 LCD Operator's Manual
Document No: LT0117
System Description
Page 2-28
19 April 2002
Issue 2.38
NETWORK BELLS CONTROL (CONTINUED)
The Bells Isolate LED now has 4 distinct cadences which identify whether the bells can ring,
and, if not, how the bells have been silenced:
OFF
- Bells will ring on alarm.
ON
- Bells have been locally isolated.
SLOW FLASHING
- Bells have been silenced remotely, i.e. RZDU or another
Network F4000.
2Hz FLASHING
- Bells have been locally silenced.
If the local F4000 is configured to send Silence Alarms whenever its bells are isolated, and
other F4000s are configured for Network Bells Control, then isolating the local bells will
cause the local Bells Isolate LED to be ON steady, whereas the Bells Isolate LEDs on the
other F4000s will be slow flashing, indicating they are remotely silenced.
If more than one F4000 has its bells isolated or silenced, then ALL F4000 Bells Isolate LEDs
will be slow flashing. In this situation, it will be necessary to find all FIPs with Isolated Bells
or local Silence Alarms using the LCD keypad System Fault Recall.
When another F4000 is found to have its bells isolated, they can be de-isolated using the
Network System Bells Isolate LCD/Keypad command. If an F4000 is found to have its local
Silence Alarms activated, then it is necessary to un-silence that F4000 by checking its own
Silence Alarms switch and the switches at any RDU connected to that F4000.
Once all local and remote Bell Isolations and Silence Alarms have been removed, the local
bells will be able to ring.
If a remote F4000 sending Trial Evacuation or Silence Alarms onto the network becomes
scan failed, each condition can be cleared at a local FIP by activating Silence Alarms or Trial
Evacuation, respectively, at the local FIP, or both conditions can be cleared by pressing
Bells Isolate at the local FIP.
Other network F4000s receiving the new Silence Alarms / Trial Evacuation activations will
clear these statuses from the scan failed F4000 in a similar manner, i.e. one F4000 can clear
the conditions from the scan failed FIP at other F4000s on the network.
Pressing the Local Bells Isolate key will cancel any Trial Evacuation and Silence Alarms on
the local F4000 that have been activated by a scan failed F4000. It will also cancel the Trial
Evacuation state at other FIPs if the Local Bells Isolate state is configured to send a Network
Silence Alarms state.
2.5.11 NETWORK SOUNDER CONTROL
All F4000 FIPs silence their internal sounders when a key on the keypad is pressed.
All F4000 V2.34N or earlier FIPs silence their local sounder if they receive a System Fault
Reset command from the network.
F4000 V2.35N may be additionally programmed to silence the sounder if an FFCIF
command is received, or a Network command is received. Alternatively, Local Sounder
Silencing due to any network command can be disabled.