Binary Input (BI) points provide two-state information to the automation station. Examples of BI points include:

  • Proof of operation switches
  • Filter alarms
  • Smoke alarms

BACnet Property

Short Name

BACnet Description

Notes

object-type

ObjTyp

Object type

Value: 3 (binary-input)

profile-name

PrfNam

Profile name

Value: 7-002-SBCv15.03

Prototype

BAObjTyp

Building automation profile

4: (BinaryInput)

present-value

PrVal

Present value

A standard BACnet enumerated property that indicates the current logical state of the input.
The enumeration range for BACnetBinaryPV is {INACTIVE, ACTIVE}.The present-value property shall be writable when out-of-service is TRUE.
The relationship between the present-value and the physical state of the output is determined by the polarity property.

Tracking_Value

TckVal

Tracking value

A read-only proprietary property that indicates the physical input state, regardless of whether the input is decoupled by means of out-of-service. The enumeration range for BACnetBinaryPV is {INACTIVE, ACTIVE}.

polarity

Pol

Polarity

A writable property that indicates the relationship between the physical state of the input and the logical state represented by the present-value property. BACnetPolarity is an enumeration with range {NORMAL, REVERSE}.

inactive-text

IactvTxt

Inactive text

A writable property that specifies a human-readable description of the INACTIVE state.
For example, if the physical input is connected to a switch contact, then the inactive-text property might be assigned a value such as "Fan 1 Off".

active-text

ActvTxt

Active text

A writable property that specifies a human-readable description of the ACTIVE state.
For example, if the physical input is connected to a switch contact, then the active-text property might be assigned a value such as "Fan 1 On".

Alarm-Extension

AlarmExtn

Event configuration

A writable enumerated proprietary property that specifies whether the optional intrinsic alarming extension is enabled for the object.

Aggregation-Extension

AggtnExtn

Aggregation: Operating hours & others

A writable enumerated proprietary property that allows an optional aggregation extension to be enabled for the object.