Behavior In Degraded Mode - Siemens FDCIO223 Technical Manual

3.6

Behavior in degraded mode

Building Technologies
Fire Safety
The following applies for FDnet/C-NET:
When the main processor of the fire control panel fails, the control panel is 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.
Degraded mode operation behavior on 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 detector line but not the exact location of the detector
triggering the alarm.
When the outputs are used for control systems (e.g., fire controls), the outputs
adopt the configured default position in the event of a communication failure or de-
energized FDnet/C-NET.
Degraded mode operation on the FDnet/C-NET is not supported by all control
panels in the same way. The information in the 'List of compatibility' and in the
corresponding control panel documentation must be taken into account during
project planning.
Structure and function
43
009122_e1_en_--
2015-10-06