2.2.108. Thermostat Fan Mode Command Class, version 3¶
The Thermostat Fan Mode Command Class, version 3 is used for the HVAC’s systems manual fan.
2.2.108.1. Thermostat Fan Mode Set Command¶
This command is used to set the fan mode in the device.
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Command Class = COMMAND_CLASS_THERMOSTAT_FAN_MODE (0x44) |
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Command = THERMOSTAT_FAN_MODE_SET (0x01) |
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Off |
Reserved |
Fan Mode |
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Reserved
This field MUST be set to 0 by a sending node and MUST be ignored by a receiving node.
Off (1 bit)
The “Off bit” set to “1” will switch the fan fully OFF. In order to activate a fan mode the “Off bit” MUST be set to “0”. However, for some applications it is critical that the fan is ON in certain modes. In this case, the application can decide to ignore the Off bit.
Fan Mode (4 bits)
This field MUST comply with the values indicated for version 3 and older in Table 2.533.
2.2.108.2. Thermostat Fan Mode Get Command¶
This command is used to request the fan mode in the device.
The Thermostat Fan Mode Report Command MUST be returned in response to this command.
This command MUST NOT be issued via multicast addressing.
A receiving node MUST NOT return a response if this command is received via multicast addressing. The Z-Wave Multicast frame, the broadcast NodeID and the Multi Channel multi-End Point destination are all considered multicast addressing methods.
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Command Class = COMMAND_CLASS_THERMOSTAT_FAN_MODE (0x44) |
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Command = THERMOSTAT_FAN_MODE_GET (0x02) |
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2.2.108.3. Thermostat Fan Mode Report Command¶
This command is used to report the fan mode in a device.
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Command Class = COMMAND_CLASS_THERMOSTAT_FAN_MODE (0x44) |
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Command = THERMOSTAT_FAN_MODE_REPORT (0x03) |
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Fan Mode (4 bits)
Refer to description under Thermostat Fan Mode Set Command (Section 2.2.108.1).
Reserved
This field MUST be set to 0 by a sending node and MUST be ignored by a receiving node.
Off (1 bit)
The “Off bit” set to “1” indicates that the fan is fully OFF. The “Off bit” set to “0” indicates that it is possible to change between Fan Modes.
For some applications, it is critical that the fan is ON in certain modes. In this case, the application can decide to ignore the Off bit. This means that the Off bit in the Report MUST always be set to “0”
