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Attribute Table
Nick Berardi edited this page Jul 19, 2026
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| Domain | Byte | Name |
|---|---|---|
| Setup | 0x01 |
Installer, scale, time, reset |
| Control | 0x02 |
Modes, setpoints, IAQ controls |
| Scheduling | 0x03 |
Program, hold, away, heat blast |
| Alerts | 0x04 |
Reminders, alerts, alert settings |
| Sensors | 0x05 |
Temps, humidity, modules, written ODT |
| Lockout | 0x06 |
Local UI lockouts |
| Status | 0x07 |
COS, sync, equipment status, errors |
| Identification | 0x08 |
Model, MAC, name |
| Messaging | 0x09 |
Message center |
| Display | 0x0A |
LCD backlight |
| Attr | Name | COS | Access |
|---|---|---|---|
| 1 | Thermostat Installer Settings | Yes | R |
| 2 | Contractor Information | Yes | R/W |
| 3 | Scale | No | R/W |
| 4 | Date and Time | No | R/W |
| 5 | Air Cleaning Installer Settings | Yes | R |
| 6 | Humidity Control Installer Settings | Yes | R |
| 7 | Fresh Air Installer Settings | Yes | R |
| 8 | Reset / Power cycle | No | W |
| Attr | Name | COS | Access |
|---|---|---|---|
| 1 | Thermostat Setpoint & Mode Settings | Yes | R/W |
| 2 | Increment Setpoint | No | W |
| 3 | Dehumidification Setpoint | Yes | R/W |
| 4 | Humidification Setpoint | Yes | R/W |
| 5 | Fresh Air Setting | Yes | R/W |
| 6 | Air Cleaning Setting | Yes | R/W |
| 7 | Thermostat & IAQ Available | Yes | R |
| Attr | Name | COS | Access |
|---|---|---|---|
| 1 | Schedule Settings | Yes | R/W |
| 2 | Away Settings | Yes | R/W |
| 3 | Schedule Day | Yes | R/W |
| 4 | Schedule Hold | Yes | R/W |
| 5 | Heat Blast | Yes | R/W |
| Attr | Name | COS | Access |
|---|---|---|---|
| 1 | Service Reminders Status | Yes | R/W |
| 2 | Alerts Status | Yes | R |
| 3 | Alerts Settings | Yes* | R/W |
* The guide notes COS for Alerts Settings is supported on the 8840 only, sent when settings are saved to EEPROM.
| Attr | Name | COS | Access |
|---|---|---|---|
| 1 | Sensor Values | No | R |
| 2 | Controlling Sensor Values | Yes | R |
| 3 | Support Modules | Yes | R |
| 4 | Written Outdoor Temperature Value | Yes | R/W |
| Attr | Name | COS | Access |
|---|---|---|---|
| 1 | Lockout Settings | Yes | R/W |
| Attr | Name | COS | Access |
|---|---|---|---|
| 1 | COS Subscriptions | No | R/W |
| 2 | Sync | No | W |
| 5 | Offline | Yes | NA |
| 6 | Thermostat Status | Yes | R |
| 7 | IAQ Status | Yes | R |
| 8 | Thermostat Error | Yes | R |
(3–4 reserved)
| Attr | Name | COS | Access |
|---|---|---|---|
| 1 | Revision & Model | Yes | R |
| 2 | MAC Address | No | R |
| 5 | Thermostat Name | No | R/W |
Guide section number is 8.5; attribute byte is
0x05.
| Attr | Name | COS | Access |
|---|---|---|---|
| 1 | Permanent Messages | No | R/W |
| 2 | Temporary Message | No | R/W |
| Attr | Name | COS | Access |
|---|---|---|---|
| 1 | LCD Backlight Settings | * | R/W |
* The guide's attribute table lists COS: No, but section 10.1 lists "COS caused by: backlight settings change at the thermostat", and COS Subscriptions has a Backlight Settings byte (19) — see Guide Errata.
Detail pages: Setup · Control · Scheduling · Alerts · Sensors · Lockout · Status · Identification · Messaging & Display
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