Behavior In Degraded Mode; Line Tester - Siemens FDM223 Technical Manual

3.3.7 Behavior in degraded mode

3.3.8 Line tester

007002_k_en_--
Applicable for the FDnet/C-NET:
When the main processor of the fire control panel fails, the control panel works in
degraded mode operation. Depending on the control panel type, the fire control
panel can continue to perform the most important alarming and signaling functions
in degraded mode operation.
Behavior of control panels that support degraded mode operation:
● Alarming is still ensured in degraded mode operation. However, in degraded
mode only collective alarming is possible. This means that in the event of an
alarm, it is possible to identify the FDnet/C-NET detector line but not the exact
location of the detector triggering the alarm.
Degraded mode operation on the FDnet/C-NET is not supported in the same way
by all control panels. The information in the 'List of compatibility' and in the
corresponding control panel documentation must be taken into account during
project planning.
The line tester FDUL221 is able to recognize and localize the following errors on
the FDnet/C-NET:
● Wiring error
● Open line
● Short-circuit
● Ground fault
In addition, the line tester recognizes the devices connected to the FDnet/C-NET
detector line.
You will find more information in document 008250.
See also
2
Applicable documents [➙ 7]
Structure and function
Function
21 | 54
3