2.2.112. Thermostat Mode Command Class, version 3

The Thermostat Mode Command Class is used to control which mode a thermostat operates.

2.2.112.1. Compatibility Considerations

The Thermostat Mode Command Class, version 3 is backwards compatible with the Thermostat Mode Command Class, version 1-2.

All commands and fields not mentioned in this version MUST remain unchanged from the Thermostat Mode Command Class, version 1-2.

This version introduces:

• A new FULL POWER thermostat mode

• MANUFACTURER SPECIFIC mode

2.2.112.2. Interoperability Considerations

The MANUFACTURER SPECIFIC (proprietary) mode MUST NOT be supported by a node if the functionality can be provided using a thermostat mode defined in this command class.

A node supporting the MANUFACTURER SPECIFIC mode MUST fulfill the following conditions:

• The node MUST support as a minimum two other thermostat modes (e.g. HEAT and COOL).

• If the MANUFACTURER SPECIFIC mode functionality can in part be supported by one or more defined thermostat mode in this command class, the node MUST also support these thermostat modes.

• The MANUFACTURER SPECIFIC mode and all of its associated Manufacturer Data fields MUST be described in the product manual.

2.2.112.3. Thermostat Mode Set Command

This command is used to set the thermostat mode at the receiving node.

7	6	5	4	3	2	1	0
Command Class = COMMAND_CLASS_THERMOSTAT_MODE (0x40)
Command = THERMOSTAT_MODE_SET (0x01)
Number of Manufacturer Data fields			Mode
Manufacturer Data 1
…
Manufacturer Data N

Number of Manufacturer Data fields (3 bits)

This field is used to advertise the length in bytes of the Manufacturer Data field in the command. This field MUST be in the range 0..7.

This field MUST be set to 0 if the Mode field is not set to 0x1F (MANUFACTURER SPECIFIC).

This field MUST indicate the length in bytes of the Manufacturer Data field if the Mode field is set to 0x1F (MANUFACTURER SPECIFIC).

Mode (5 bits)

This field is used to set the thermostat mode at the receiving node.

This field MUST be encoded according to Table 2.535.

Manufacturer Data (N bytes)

This field is used to provide a configuration for the MANUFACTURER SPECIFIC mode. Refer to Interoperability considerations (Section 2.2.112.2).

Table 2.535 Thermostat Mode Set version 3::Mode encoding

Mode (5 bits)		Description	Requires own Setpoint	CC Version
0x00	OFF	This mode is used to switch off the thermostat.	No	1
0x01	HEAT	This mode is used to use activate heating when the temperature is below the Heating (0x01) setpoint.	Yes	1
0x02	COOL	This mode is used to use activate cooling when the temperature is above the Cooling (0x02) setpoint.	Yes	1
0x03	AUTO	This mode is used to regulate the temperature using heating and cooling when the temperature is outside the range defined by the Heating (0x01) and Cooling (0x02) setpoints.	No	1
0x04	AUXILIARY	This mode is used to activate heating when the temperature is below the Heating (0x01) setpoint, but using an auxiliary or emergency heat source. For example, a heat pump is not more efficient when the outside temperature is too low. The auxiliary heat mode may be activated to use a more efficient secondary heat source.	No	1
0x05	RESUME (ON)	This mode is used to resume the last activate mode (different than OFF 0x00).	No	1
0x06	FAN	This mode is used to activate fans only and circulate air.	No	1
0x07	FURNACE	This mode is used to activate fans to circulate air and heating or cooling will be activated to regulate the temperature at the Furnace (0x07) setpoint.	Yes	1
0x08	DRY	This mode is used to dehumidify and remove moisture. Heating or cooling will be activated to regulate the temperature at the Dry Air (0x08) setpoint.	Yes	1
0x09	MOIST	This mode is used to humidify and add moisture. Heating or cooling will be activated to regulate the temperature at the Moist Air (0x09) setpoint.	Yes	1
0x0A	AUTO CHANGEOVER	This mode is used to regulate the temperature at the Auto Changeover (0x0A) setpoint using heating and cooling.	Yes	1
0x0B	ENERGY HEAT	This mode is used to activate heating when the temperature is below the Energy Save Heating (0x0B) setpoint. The Energy Save Heating (0x0B) setpoint is usually lower than the Heating (0x01) setpoint in order to save energy.	Yes	2
0x0C	ENERGY COOL	This mode is used to activate cooling when the temperature is below the Energy Save Cooling (0x0C) setpoint. The Energy Save Cooling (0x0C) setpoint is usually higher than the Cooling (0x02) setpoint in order to save energy.	Yes	2
0x0D	AWAY	This mode is used to regulate the temperature using heating and cooling when the temperature is outside the range defined by the Away Heating (0x0D) and Away Cooling (0x0E) setpoints.	Yes	2
0x0E	Reserved		-	3
0x0F	FULL POWER	This mode is used to regulate the temperature at the Full Power (0x0F) setpoint using heating and cooling. This mode is intended to use more energy and speed up the temperature regulation to the desired setpoint.	Yes	3
0x1F	MANUFACTURER SPECIFIC	Reserved for vendor specific thermostat mode.	No	3

All other values are reserved and MUST NOT be used by a sending node. Reserved values MUST be ignored by a receiving node.

2.2.112.4. Thermostat Mode Report Command

This command is used to report the current mode of the device.

7	6	5	4	3	2	1	0
Command Class = COMMAND_CLASS_THERMOSTAT_MODE (0x40)
Command = THERMOSTAT_MODE_REPORT (0x03)
Number of Manufacturer Data fields			Mode
Manufacturer Data 1
…
Manufacturer Data N

No of Manufacturer Data fields (3 bits)

This field is used to advertise the length in bytes of the Manufacturer Data field in the command. This field MUST be in the range 0..7.

This field MUST be set to 0 if the Mode field is not set to 0x1F (MANUFACTURER SPECIFIC).

This field MUST indicate the length in bytes of the Manufacturer Data field if the Mode field is set to 0x1F (MANUFACTURER SPECIFIC).

Mode (5 bits)

This field is used to advertise the current thermostat mode at the receiving node.

This field MUST be encoded according to Table 2.535.

This field MUST NOT be set to 0x05 (RESUME(ON)) in this command.

Manufacturer Data (N bytes)

This field is used to advertise the current configuration for the MANUFACTURER SPECIFIC mode. Refer to Interoperability considerations (Section 2.2.112.2).