
20 Fault Finding Guide Doc. version 2
4.9 Network traffic diagnostics FIRECLASS Fire Alarm Control Panels
4.9 Network traffic
diagnostics
From Version 22.0 a panel menu option is available to
print information from all the network cards in the sys-
tem.
The function is accessed by first logging in to the panel
and then selecting:
7-Service > 3-Diagnostics > 8-Net Card Info
These network statistics indicate how well the panel
network has been running before waiting to see if any
new faults are logged in the Fire Panels or starting new
tests for network performance.
The counters continually increment in each network
card gathering numbers of good and bad messages
from the left and from the right network ports.
Error counts are accumulated into different groups to
help to pinpoint network sections suffering from noisy
interference or intermittent faults.
It is not necessarily the counts themselves that are
important but changes to the values. It is suggested
taking a print of the network state, then taking another
a while later and comparing the figures.
The figures for each node include:
The state of all monitored network fault events
Next Active Logical Address
Source of ‘Flow Control = On’
Left/Right Port:
– Good Messages
– Serial Errors
– Incomplete Messages
– Checksum Errors
Packet counts:
–Sent
– Received
Seconds Count:
– ‘Count Up Time’ time since the figures were
reset.
– Full Up Time, time since the network card was
restarted.
Analogue Measurements:
– Left ADC, Right ADC and Network Ground.
Left ADC, Right ADC and Network Ground are 10 bit
average values of multiple readings taken over the last
few seconds that are used to help detect network par-
tial open circuit and partial short circuit faults and earth
leakage faults.
The fault thresholds are:
OPEN CIRCUIT FAULT = 12F or less (303 in decimal)
SHORT CIRCUIT FAULT = 281 or greater (641 in
decimal)
GROUND LEAKAGE FAULT = 26C or less (620 in
decimal)
Once in fault there is hysteresis used in the process-
ing of these averages, so faults should clear when:
Left/Right readings are within 134 to 27D (308 to
637 decimal)
Ground readings are above 28B (651 in decimal)
4.10 High Level Checks
Are all the network cards connected L to R of their
neighbouring card throughout the ring network?
Is the host interface baud rate of the TLI800EN set
to match that set in the Fireclass Express -> Panel
Details dialog ?
Has the network card been reset after downloading
an updated network configuration to the panel?
If there is a Graphics system on the network has its
network parameters been updated?
If the network card has previously been connected
to a different host panel have you performed a SW1-
7=ON reset (or an address 127 reset) procedure to
erase any old data?
Are the network cables within the required resist-
ance and capacitance values as specified in the
TLI800EN Fixing Instructions?
Are the network cables screened and if so is the
screen correctly connected to a clean earth?
Are the network cables routed away from power and
data cables that can be a source of inference?