The MultistateLFSSL Type requires two independent latched binary physical outputs, Fast and Slow.

The table shows the value of the DO(s) for a given state of the bundled point.

LFSSL Control Circuit States.

State

DO-1

DO-2

DI-3

FAST

ON

OFF

ON

SLOW

OFF

ON

ON

STOP

OFF

OFF

OFF

 

BACnet Property

Short Name

BACnet Description

Notes

object-type

ObjTyp

Object type

Value: 5 (multistate output)

profile-name

PrfNam

Profile name

Value: 7-006-SBCv15.03

Prototype

BAObjTyp

Building automation profile

Value: 5 (multistate output)

IO-Extension

SubsysExtn

Subsystem

A writable enumerated proprietary property that specifies the type of I/O extension used by this Object. IO-Extension will always be BO-PULSE.

IOAddress

IOAddress

I/O address

A writable proprietary property that specifies the fieldbus (e.g., IO-0 for Onboard-I/O, IO-1 for TX-I/O) and IO module for this object's ON output.

IOAddress-2

AutoAddr

Auto address

A writable proprietary property that specifies the fieldbus (e.g., IO-0 for Onboard-I/O, IO-1 for TX-I/O) and IO module for this object's OFF output.

present-value

PrVal

Present value

Indicates the current logical value of the output.
The logical value ranges from 1 to n, where n is equal to the number of states defined in the number-of-states property.

priority-array

PrioArr

Priority array

Contains prioritized commands that are in effect for this object. BACnetPriorityValue is either an Unsigned value or null.
Unassigned value ranges from 1 to n, where n is equal to the number of states defined in the number-of-states property.

Present-Priority

PrPrio

Present priority

Indicates the highest priority slot (1-16) in the priority-array with a non-null value.
If all slots in the priority array are null, Present-Priority shall have the value 17.

relinquish-default

DefCmd

Default command

Provides the default value for present-value property when all slots in the priority-array are null.
Unsigned values range from 1 to n, where n is equal to the number of states defined.

Tracking_Value

TckVal

Tracking value

Indicates the target state written to the physical output, regardless of whether the output is commanded, decoupled via the out-of-service property or physically overridden by external hardware.
Unsigned values range from 1 to n, where n is equal to the number of states defined.

number-of-states

NumSta

Number of states

A read-only standard BACnet property, of type Unsigned, that defines the number of states the present-value may have. In Multistate-LFSSL objects number-of-states is always 3.

state-text

StaTxt

State text

A writable standard BACnet property that provides descriptions of all possible states of present-value. The present-value, interpreted as an integer, serves as an index into the array.
In MultistateLFSSL objects, the state-text array has three elements {Stop, Slow, Fast}.

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