Application

Room Segment Functions
Device Control Functions HVAC
64
Siemens Industry, Inc.
Application Note
A6V11692053
Smart Infrastructure – Building Products
2019-04-01
Configuration
Description
Parameter
Default value
Enable overtemperature detector input
▶ Enable input, must be set to 1:Yes when an electric
heating coil over temperature detector (binary input) is
present. When electric heating coil over temperature
detector is closed, the heating coil device mode will
turn Off at priority (4:Protection 1). When heating coil
over temperature detector is open, the heating coil
device mode will be released to 15: Automatic mode 6).
0:No
1:Yes
EnOvrTDetIn
0:No
Nominal electric power
▶ The nominal electric power (kW) for the electric
heating coil. The total power for the electric heating coil
can be found on manufacturers data sheet.
NomElPwr
0.4 [kW]
Switch-on point for air volume flow hold heating
▶ When the heating coil position (in percent) is
greater than the switch-on point for air volume flow
hold heating, the airflow volume hold heating interlock
to the fan goes to True.
SwiOnAirFlHldH
4 [%]
Hysteresis for air volume flow hold heating
▶ When the heating coil position (in percent) is less
than the hysteresis value, the air volume flow hold
heating interlock goes False.
HysAirFlHldH
2 [%]
Switch-off delay for hold signal for air volume flow
heating
▶ The time after the switch-off point for air volume
flow hold heating is True, then the air volume flow hold
heating changes from True to False.
DlyOffAflHldH
30 [s]
Switch-on point for air volume flow heating request
▶ When the heating coil heating request (in percent)
is above this value, the air volume flow heating request
goes to True.
SwiOnAirFlHReq
4 [%]
Hysteresis for air volume flow heating request
▶ When the heating coil heat request (in percent) is
below this value, the air volume flow heating request
goes to False.
HysAirFlHReq
2 [%]
Switch-on delay for air volume flow heating request
▶ The time after the switch-on point for air volume
flow heating request is True that air volume flow
heating request changes from False to True.
DlyOnAirFlHReq
30 [s]
Interlocks
Interlocks are (typically) binary signals that ensure equipment protection.
Additional signals help coordinate the interaction sequences between HVAC
devices.
A signal's direction In / Out (and function, to some degree) depend on the HVAC
device. For example, an airflow status (AirFlSta) interlock signal can be output from
a supply damper or a fan, and sent as input to a coil or an OA damper. In the table
that follows, descriptions of a signal's functionality reflect its usage by the electric
heating coil, two binary output.