Damper Control - Siemens FC7xx Operation Manual

System description
9
Control

9.5.5 Damper control

154 | 184
Building Technologies
Fire Safety
Damper control actuates fire dampers and/or smoke dampers via input/output
modules on the C-NET.
Example of fire damper control
A fire damper control corresponds to the ventilation zone.
Fire damper control could be activated by a fire alarm, for example. In the event of
a fire alarm, the open fire dampers are closed.
Example of smoke damper control
Smoke damper control could be activated by an input, for example. If the input is
activated by the fire brigade, the smoke dampers are opened.
Communication with Desigo PX sub-system
FS720 uses BACnet objects of the 'Binary Value' and 'Multi-State Value' types to
communicate with the Desigo PX sub-system so that the fans can be controlled via
Desigo PX controllers. FS720 communicates the following events to the Desigo PX
sub-system:
● Fire alarm combinations, so the Desigo PX controllers will switch off the fans in
the event of a fire:
– If configured to do so, FS720 sends a 'Section summary' to the sub-
systems over BACnet. The 'Section summary' shows a fire alarm below the
relevant section in the subtree. The 'Section summary' is activated in the
'Global behaviour' element in Engineering Tool. See document
A6V10210424.
● Status of dampers
Operating the dampers via Desigo PX
The Desigo PX sub-system transmits manual commands for opening or closing the
dampers to FS720 over BACnet. For example, the fire brigade can open the
dampers manually once the fire has been extinguished in order to extract the
smoke. For this purpose, a key switch can be connected to Desigo PX.
Manual commands from Desigo PX take priority over the commands of the
automatic damper control.
Configuring BACnet priorities
The BACnet priorities for automatic damper controls and for manual damper
control via an FS720 operating terminal are configured in the 'Global behaviour'
element in Engineering Tool. See document A6V10210424.
FS720 monitors the connection to the Desigo PX sub-system so that the fire
dampers will be closed if the connection is lost.
EDE export
The BACnet parameters for damper control and for the fire alarm combinations can
be exported to an EDE file in Engineering Tool. The EDE file can then be used in
Desigo PX to configure the Desigo PX controller so that BACnet communication
with the FS720 takes place correctly.
You will find more information on performing an EDE export in document
A6V10210424.
A6V10211076_i_en_--
2015-12-15