Triac Output BACnet Objects
TO - Triac Output Object Description (Binary Output: 0-3)
The object is designed to service the triac output working in the digital mode. The BACnet Triac Output object has the following properties:
Dynamically creatable: no, dynamically deletable: no.
Property Name | Required | Proprietary | Writable | Property ID | Data Type | Description |
|---|---|---|---|---|---|---|
OBJECT_IDENTIFIER | Yes | From BO:0 to BO:3 | ||||
OBJECT_NAME | Yes | TO-x | ||||
OBJECT_TYPE | Yes | |||||
PRESENT_VALUE | Yes | Yes | PRESENT_VALUE property | |||
STATUS_FLAGS | Yes | STATUS FLAG property | ||||
EVENT_STATE | Yes | |||||
OUT_OF_SERVICE | Yes | Yes | OUT OF SERVICE property | |||
POLARITY | Yes | |||||
PRIORITY_ARRAY | Yes | Yes | ||||
RELINQUISH_DEFAULT | Yes | Yes |
PRESENT_VALUE Property
The Present Value property stores information about the actual state of the triac output.
Note: If the TO is in the hand mode, the actual value of the TO is stored in the HAND_STATUS object.
COV INCREMENT Property
In the firmware versions above 4.0, MIX and MINI modules support COV (change of value), which means that the module automatically sends the triac output value if the value changes more than the COV Increment property value.
OUT OF SERVICE Property
For the Triac Output object, the OUT OF SERVICE property is set to true if the output is overridden by the USB connection or from the module web page (only in IP version). In such case the OUT OF SERVICE is set to false value if the Present Value property is set by the BACnet message.
The OUT OF SERVICE property is also set if the triac output configuration is set to the PWM mode.
STATUS FLAG Property
The Status Flag property contains information about the status of object status. This property consists of 4 binary flags. Each flag is described in the table below.
Module Input | Results | |||
|---|---|---|---|---|
TO Switch | Priority Array | Present Value | Digital Output | Status Flag Property |
Auto position | NULL | Default | Default | 0000 |
BINARY VALUE | BINARY VALUE | BINARY VALUE | ||
Manual position | null | TRUE | ON | 0010 |
ON | ||||
Manual position | null | FALSE | OFF | 0010 |
OFF | ||||
TO PWM VALUE - Triac PWM Object Description (Analog Output: 0-3)
This object is designed to serve the triac output in the PWM mode. The BACnet PWM VALUE object has the following properties:
Dynamically creatable: no, dynamically deletable: no.
Property Name | Required | Proprietary | Writable | Property ID | Data Type | Description |
|---|---|---|---|---|---|---|
OBJECT_IDENTIFIER | Yes | From AO:0 to AO:3 | ||||
OBJECT_NAME | Yes | TO-x PWM VALUE | ||||
OBJECT_TYPE | Yes | |||||
PRESENT_VALUE | Yes | Yes | PRESENT_VALUE Property | |||
STATUS_FLAGS | Yes | STATUS FLAG Property | ||||
EVENT_STATE | Yes | |||||
OUT_OF_SERVICE | Yes | Yes | OUT OF SERVICE Property | |||
UNITS | Yes | |||||
PRIORITY_ARRAY | Yes | Yes | ||||
RELINQUISH_DEFAULT | Yes | Yes | ||||
COV INCREMENT | No | Yes | This property stores percentage value of PWM output duty cycle. Output operation mode is defined by TO_CONFIGURATION object. COV INCREMENT Property | |||
OUTPUT_TYPE * | Yes | Yes | 4001 | Enumerated | ||
HAND_STATUS * | Yes | 3014 | Boolean | |||
HAND_VALUE * | Yes | 3015 | Enumerated |
* Additional properties of the object are saved to maintain the backward compatibility with the older firmware version. In the new firmware version, each property has a corresponding BACnet object.
PRESENT_VALUE Property
The property stores the percentage value of the PWM output duty cycle. The output operation mode is defined by the TO_CONFIGURATION object.
COV INCREMENT Property
In the firmware versions above 4.0, MIX and MINI modules support COV (change of value). It means that the module will automatically send the PWM_VALUE value if it changes more than the COV Increment property value.
OUT OF SERVICE Property
For the PWM Outputs object, the OUT OF SERVICE property is set to true if the output is overridden by a USB connection or from the module web page (only in IP version). In such case, the OUT OF SERVICE is set to false if the Present Value property is set by the BACnet message. The OUT OF SERVICE property is also set to true if the triac output configuration is set to the digital output mode.
STATUS FLAG Property
The Status Flag property contains information about the status of the object. This property consists of 4 binary flags. Each flag is described in the table below.
Module Input | Results | |||
|---|---|---|---|---|
TO Switch | Priority Array | Present Value | Digital Output | Status Flag Property |
Auto position | NULL | Default | Default | 0000 |
DUTY VALUE | DUTY VALUE | ON/OFF | ||
Manual position | NULL | 100% | ON | 0010 |
DUTY VALUE | ||||
Manual position | NULL | 0% | OFF | 0010 |
DUTY VALUE | ||||
HAND_STATUS Object (Multistate Value: 23-26)
The Hand Status object stores the status of the hand operation switch and the status of the TO in the hand mode according to the table below:
Value of Hand Status | Status Description |
|---|---|
1 | AUTO-OUT=OFF |
2 | AUTO-OUT=ON |
3 | HAND-OUT=OFF |
4 | HAND-OUT=ON |
TO CONFIGURATION Object (Multistate Value: 17-22)
This object contains information about the mode of the triac output according to the following table:
Property Value | Description |
|---|---|
1 (default) | Digital Output |
2 | PWM 1 Hz |
3 | PWM 10 Hz |
4 | PWM 0.1 HZ |
5 | PWM 0.01Hz |
This configuration is also available in the PWM VALUE object as the OUTPUT_TYPE Property 4001.