Quadnet Control Panel Engineering and Commissioning Manual
49
The number shown under
Init Complete
gives a count of the total number of devices initialised on the
system. If initialisation is completed correctly this is followed by a tick, whereas if there is any failure in
initialisation this is followed by a cross.
In normal initialisation conditions the control panel will start from Loop end 1, find, interrogate and address
each device on the loop one at a time. When the second end of the loop is reached the control panel will
display a tick or cross as shown above to indicate whether or not a complete loop was found.
Finally the control panel will investigate any spur connections from Multipoint detectors. Spurring was a
feature in earlier panels and devices which allowed up to 5 devices to be spurred from a Multipoint detector
over a 20m distance (total). The overall maximum permissible cable distance of 2km for an addressable
circuit included both the main loop and any such spur runs and up to 5 spur runs were permitted on the
system. This feature is no longer supported in current panels and devices. Even though spurs are no longer
supported, the devices are still checked as part of the initialisation process for the presence of spurs. The
Spur Dev Init
column should indicate that no spurs are present on the system. If all devices are checked
and no spurs are found a tick should be shown. However, if the panel found any spurs during this process,
then even if initialisation has completed and a tick is shown, the loop should be stopped and the spurred
devices rewired into the main loop.
When all possible devices have been initialised the control panel will indicate either that initialisation is
complete or not, and the number of devices found.
The following LEDs will be extinguished (as long as no other faults exist).
DISABLED
and
LOOP FAULT/DISABLE
Or:
The following LEDs will remain on:
DISABLED
and
LOOP FAULT/DISABLE
After initialising the loop and pressing ESC to exit the STANDARD INITIALISATION screen, if the number
of devices initialised does not match the number of devices programmed, a DEVICE QUANTITY
MISMATCH screen will appear. This screen will give details of the number of devices found and the number
of devices programmed.
Note that if the panel is new, a device quantity mismatch is likely because the panel will have been tested in
the factory with various configurations and will have remembered the final test configuration.
Initialisation Faults
Device Quantity Mismatch
A device mismatch will occur if a device or devices have been physically removed from or added to
the system and these changes have not been updated in the OSP and downloaded into the panel.
The panel will be expecting to find the original number of devices which were downloaded to it.
Check the site information to see if any changes have taken place and compare this with the OSP
file.
Another cause could be that the loop was initialised too quickly after it was stopped. If a device has
not powered down completely it may be missed when the loop is initialised causing a mismatch.
Stop the loop and wait at least 5 minutes before reinitialising again.
Loop +ve to –ve Short Circuit
Loop +ve Open Circuit
If the system faces a
Loop +ve to –ve short circuit,
or a
Loop +ve open circuit
during
initialisation, the initialisation will fail at that point and a message of
Loop not complete
will be
displayed.
