Address allocation
How addresses are allocated to devices
Each device that is connected to the loop circuit is allocated an address (a soft address). The first
device is given address 1 and the next one is given address 2 and so on.
¨
The allocation of addresses starts from one End of a loop circuit in a numerical order.
If both ends of the loop are connected then the allocation of addresses starts from
End-1. On reaching a T-breaker the spur circuit off the main loop is allocated with
addresses. On completion the process continues along the main loop.
"
The new map is checked against the last map held in the Flash memory, if
found to be different then a message is displayed.
Address allocation from Loop END 1
¨
You will see the 'powering up' messages which tells you the progress of address
allocation and the number of devices found and the last device on the loop.
¨
If the address allocation reaches the last device then the panel will show 'Wiring open
circuit' fault as End 2 is not connected to the panel and also there will be a 'Backup
required' reminder. Ignore the reminder at this stage of commissioning.
¨
Even if all the devices are wired correctly, there may still be other device faults, like
mains and battery disconnected at a mains powered interface unit. The panel fault
buzzer will sound and the Fault LED will be lit.
¨
To stop the local buzzer from sounding, press the Cancel Buzzer button. You may
need to enter an access code if at level 1.
"
Refer to 'Appendix A - Message action list' for information on the displayed
fault(s) and possible action to rectify the fault(s), see page 72.
Address allocation from Loop End 2
Manually Power-Down the loop and disconnect Loop at End-1 and connect Loop at End-2 to
check address allocation works from Loop End 2. Power-Up the loop. On successful allocation of
addresses Power-Down the loop and then connect both ends of the loop and then Power-up the
loop. Upon successful allocation of addresses to all devices on the loop you can Start Detection.
Allocation faults
¨
The device with a hardware fault may have its LED lit.
¨
An allocation fault that has been rectified will not be recognised until after
re-allocation of the loop.
¨
Allocation faults will not be able to distinguish between a point type sensor and a call
point.
¨
When a short circuit fault is found, the loop re-allocates to the device before the short
circuit. The device loop breaker remains open and the device LED is lit.
Start Up
¨
A loop is started after allocation, each device is set up to start operating normally
based on device type, when analogue channels are read.
4188-949 issue 3_05/10_Nano Comms inst. 23
Nano panel based system
Address allocation
byHoneywell
POWERFAULT
FIRE
Test
Delay
Verify
SounderFault
Zone2
Zone6
Zone10
Zone14
Zone3
Zone7
Zone11
Zone15
Zone4
Zone8
Zone12
Zone16
Disablement
Zone1
Zone5
Zone9
Zone13
SystemFault
Sound
Alarms
Silence
Alarms
PowerFault
Reset
Cancel
Buzzer
Sounder
Disablement
042bc
EN54Parts 2 & 4
1 2 3
4
9 10
11
12
5 6 7 8
13
22
23 24 25
14
21
15
28 27 26 20 19 18 17
16
PANEL
Main
loop
circuit
Spur on main loop
LOOP
END 1
Note: The End 2 connection is
not made at this stage of commissioning
Spur
on
main
loop
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