SIMPLY INIMITABLE.
20. Behavior of Thermostat on voltage failure,
recovery and commissioning.
21. Control Panel
Behavior on bus voltage failure
On failure of bus voltage no actions are executed by
the device; behavior of controlled actuators must be
set using their own parameters.
Behavior on bus voltage recovery
On bus voltage recovery all the communication
objects are set to 0 except for objects for which a
parameter is de ned for the initial value.
Thermostat keeps these values in memory and restore
them after recovery:
• Heat / Cool mode (if enabled)
• HVAC Mode (if enabled)
• Base Setpoint (if enabled)
• Force value in manual mode (if enabled)
Control values (i.e. commands to actuators) are cal-
culated on the base of actual setpoint and measured
temperature.
• After power on device recalculates the com-
mands to actuators and switch them on, if necessary,
otherwise does not carry out any action; you are
recommended to set the behavior of actuator in order
to switch the heating / cooling equipment o after
bus power on.
Behaviour on commissioning (ETS Download)
After download it is possible to set initial value of:
• Heat / Cool mode (if enabled)
• HVAC Mode (if enabled)
For other communications objects the behavior is
identical to bus voltage recovery.
Wrong application download
If the wrong ETS application is downloaded then KNX/
EIB led starts blinking and device is not operative on
the bus. A power reset must be done and the correct
ETS application must be downloaded.
The operator panel mode is used when the device
behaves as a user interface while the temperature
control function is delegated to another device or to
a subsystem that communicates with the operator
panel via the KNX bus
Communication object what can be written on the
KNX bus (can be used all or some):
• Temperature Alarm
• Actual Temperature
• Actual Setpoint
In this Mode the three capacitive buttons continue to
work normally. [1]
[1]: functions freely con gurable can be used to
manage the type HVAC controls, the speed of the fan
coil, or various commands such as ECO; DND, MUR,
OFF; etc ..
Communication object what can be read on the KNX
bus (can be used all or some):
• Actual Temperature (from another KNX devi-
ce)
• Setpoint Adjustment (1 bit or 1 byte object
that permits the adjustment “-“/”+” of the sepoint)
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