Orion-system PT-Link II BACnet2 Manuel d'utilisateur télécharger pdf (Page 34)

PT-Link II BACnet

®

Technical Guide

PT-Link II Interface

34

Appendix D - VCB-X BACnet Parameters

BACnet Properties for the VCB-X Controller

Parameter Name Object Description

Limits

Low Coil

Temperature

Setpoint

LoClTpSt AV:295 This is the

lowest that the

Coil

Temperature

will be reset to

during Space

Humidity Reset

of the Coil

Suction

Temperature

Setpoint.

Produces a

dewpoint in

the supply air

approximately

10˚F above this

setpoint.

35 70

Condenser

Control Signal

CdCtrSg1 AI:280 Condenser Fan

Signal 1 Status.

Control Status CtrlSts AI: 4 Current

operational

status.

See Control

Status Bits on

page 39.

Control

Temperature

CtrlTp AI: 9 Current value

of the control

temperature

sensor.

Cooling

Enabled

ClEnbl AI: 6 Status that

indicates

mechanical

cooling is

enabled.

Cooling

Setpoint

Mirror

ClSt AI: 7 Occupied

Cooling Mode

Enable

Setpoint Mirror.

Dewpoint

Setpoint

RhDewpSt AV:282 On a MUA unit,

if the outdoor

dewpoint rises

above this

setpoint, the

unit will

activate Dehu-

midiﬁ cation.

35 80

Economizer

Enabled

EcoEnbl AI: 15 Status that

indicates

the economizer

is enabled.

Economizer

Enable

Setpoint

EcoEnbSt AV:283 The economizer

is enabled if the

outdoor dry-

bulb, dewpoint,

or wetbulb

temperature

falls below this

setpoint.

-30 80

Economizer

Position

EcoPos AI: 16 Current

position of the

economizer

damper.

BACnet Properties for the VCB-X Controller

Parameter Name Object Description

Limits

Minimum

Economizer

Position

MinEcoSt AV: 151 This is the

minimum

position of the

economizer in

the occupied

mode.

0 100

Force

Economizer

FrcEcono AV: 267 Overrides all

other Outdoor

Air Damper

position com-

mands so as to

maintain this

ﬁ xed position.

Conﬁ guring

for “Auto” will

restore normal

unit control of

the Outdoor

Air Damper/

Economizer

operation.

0% 100%

Auto=65535

Exhaust Fan

CFM

EtCFM AI:194 Current

Exhaust

Airﬂ ow

Measurement

Exhaust Fan

Speed

EtFnSpd AI: 273 Current

position of the

VFD relief

fan signal.

Fan

Starting Delay

FanDly AI: 25 Indicates the

current fan

status related

to request to

run, fan starting

delay or POF

failure.

0=No Request

1=Fan

Running

2=Fan Start

Delay

3=POF Failure

Force HVAC

Mode

FrcHvacM AV: 262 Overrides

normal control-

ler operation in

order to force

the unit into

this desired

mode. Con-

ﬁ guring for

“Auto” will

restore normal

unit control of

the mode of

operation.

0=Auto

1=Vent

2=Cool

3=Heat

4=Vent

Dehum.

5=Cool

Dehum.

6=Heat

Dehum.

Head

Pressure

HeadPr AI:276 Current value

of the Head

Pressure

Reading.

Head

Pressure

Setpoint

HeadPrSt AI:279 Current Head

Pressure

Setpoint.

Revised 1/20/12

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 59 60

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