BACnet Interface - Analog Input Object - Light Sensor
Analog Input Object - Light Sensor
To obtain the light sensors' illuminance level, use the Analog Input objects.
Light Sensor
List of available properties for these objects.
| Property Identifier | Property ID | Property Datatype | Conformance Code |
|---|---|---|---|
| Object_Identifier | 75 | BACnetObjectIdentifier | R |
| Object_Name | 77 | CharacterString | R |
| Object_Type | 79 | BACnetObjectType | R |
| Present_Value | 85 | REAL | W |
| Description | 28 | CharacterString | R |
| Device_Type | 31 | CharacterString | R |
| Status_Flags | 111 | BACnetStatusFlags | R |
| Event_State | 36 | BACnetEventState | R |
| Reliability | 103 | BACnetReliability | R |
| Out_Of_Service | 81 | BOOLEAN | W |
| Units | 117 | BACnetEngineeringUnits | R |
| Min_Pres_Value | 69 | REAL | R |
| Max_Pres_Value | 65 | REAL | W |
| COV_Increment | 22 | REAL | W |
| Light_Hystereris | 564 | Unsigned | W |
| Light_Hystereris_Minimum | 565 | Unsigned | W |
| Light_Raw_Value | 570 | REAL | R |
| Light_Calibration_Measured_Value | 571 | REAL | R |
| Light_Calibration_Sensor_Value | 572 | REAL | R |
| Device_Serial_Number | 573 | OCTET STRING | R |
Object_Identifier
The object instance number is represented as TCLL.
-
"T" is the type of object as follows, 5 for DALI sensors.
-
"C" represents the DALI channel number, 0, 1, 2, or 3.
-
"LL" represents for sensor objects, numbers 00-31.
Object_Name
The name of the light sensor.
Object_Type
ANALOG_INPUT (0).
Present_Value
The current illuminance level.
Description
A description of the light sensor.
Device_Type
A text description of the physical DALI device connected to the analog input. For light sensor objects, it is "DALI sensor".
Status_Flags
This property indicates the general "reliability" of an analog input object.
Reliability
This property indicates whether the operation of the DALI sensor is reliable. The values are as follows:
-
NO_FAULT_DETECTED (0) - No fault has been detected.
-
NO_SENSOR (1) - No physical device is connected to the input object.
-
COMMUNICATION_FAILURE (12) - DALI device is offline.
-
UNRELIABLE_OTHER (7) - A DALI error has been reported by the DALI sensor.
Out_Of_Service
It indicates whether the physical device that the object represents is in service.
Units
The unit for the Present_Value is luxes.
Min_Pres_Value
The minimum value is always zero (0). It represents the lowest value for the property Present_Value.
Max_Pres_Value
The maximum value is always infinity. It represents the highest value for the property Present_Value.
COV_Increment
This property specifies the minimum change of the Present_Value that issues a COVNotification.
Light_Hystereris
This is a percentage of the current sensor internal illuminance level.
The valid values are from 0 to 25 percent.
Light_Hystereris_Minimum
The minimum hysteresis.
The valid values are from 0 to 255.
Light_Raw_Value
The uncalibrated light sensor reading before applying any calibration calculations.
Light_Calibration_Measured_Value
The value measured by an external lux meter, used for calibrating the light sensor.
Light_Calibration_Sensor_Value
The light sensor reading value used as a reference point during the calibration process.
Device_Serial_Number
The DALI serial number of the input device.