50
[U]_O3
AI
U*17+10
ppm
Ozone
[U]_PM10
AI
U*17+11
μg/m
3
Suspended particulate matter PM10
[U]_PM2.5
AI
U*17+12
μg/m
3
Suspended particulates matter PM2.5
[U]_DEV_1_ERROR_CODE AI
U*17+13
N/A
Ventilation equipment 1 error code
Contact the ventilation equipment
supplier
[U]_DEV_2_ERROR_CODE AI
U*17+14
N/A
Ventilation equipment 2 error code
Contact the ventilation equipment
supplier
[U]_DEV_3_ERROR_CODE AI
U*17+15
N/A
Ventilation equipment 3 error code
Contact the ventilation equipment
supplier
[U]_DEV_4_ERROR_CODE AI
U*17+16
N/A
Ventilation equipment 4 error code
Contact the ventilation equipment
supplier
[U]_ENABLED
BI
U*3+0
N/A
Is UNOnext enabled?
0: Disabled
1: Enabled
[U]_ONLINE
BI
U*3+1
N/A
For the connection status between
UNOnext and UNOcentral, either RS485
mode or MQTT mode can be used.
0: Offline
1: Online
[U]_CMD_PWR
BI
U*3+2
N/A
Ventilation equipment switch command
set for UNOnext
0: Off
1: On
[U]_CMD_FAN
MI
U*1+0
N/A
Number of fan segments of the
ventilation equipment set for UNOnext
1: Low
2: Mid
3: High
As shown in the table above, the object name of the no. 13 UNOnext carbon dioxide (CO
2
)
value is [13]_CO2 and its ID is AI.227 (OBJECT_ANALOG_INPUT:227).
In addition, for BACnet objects of the sensor type, special status codes are defined, as
shown in Table 22. If the value of the object is a special status code, it means that the sensor
