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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




Properties of the Triac Output object

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
ON

null

TRUE

ON

0010

ON

Manual position
OFF

null

FALSE

OFF

0010

OFF

STATUS FLAG property changes

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


Properties of the PWM Value object

* 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
ON

NULL

100%

ON

0010

DUTY VALUE

Manual position
OFF

NULL

0%

OFF

0010

DUTY VALUE

Status Flag property changes

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

The Hand Status object value list

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

The TO Configuration object value list

This configuration is also available in the PWM VALUE object as the OUTPUT_TYPE Property 4001.

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