Note
Writing to the 1-byte mode object will always set the operating mode regardless of the
value of the 1-bit objects, and vice-versa.
When a new operating mode is selected, the current temperature setpoint will be set to that of
the new operating mode.
2.4.3.5
Forced protection mode
Under certain circumstances, it may be desirable to override the currently selected operat-
ing mode, and force the thermostat into Protection mode. This is called “Forced protection”
mode.
This could be the case, for example, when windows are opened in an hotel room. For this
purpose, an additional “Window status” communication object can be enabled, which could
be connected to e.g. a window sensor. When the activation value (“1”) is written to this object,
the thermostat automatically switches into Forced protection mode, and will remain in this
mode as long as the communication object does not receive the deactivation value (“0”).
If the thermostat receives a request to change operating mode while it is in Forced protection
mode, the request will be processed, but the change will not be effective until Forced protection
mode is deactivated.
2.4.4
Heating and Cooling
Each thermostat can be configured to operate in heating mode only, in cooling mode only, or in
combined heating and cooling mode.
If combined heating and cooling operation is selected, switching between heating and cooling
can be done either manually (by means of an associated communication object) or automati-
cally.
2.4.4.1
Automatic switching
If automatic switching of heating/cooling is selected, the thermostat will automatically deter-
mine the heating/cooling mode depending on the current room temperature and the configured
temperature setpoints.
2.4
Thermostats
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