Orion-system PT-Link II LON Manual de usuario descargar pdf (Pagina 36)

PT-Link II LON

®

Technical Guide

PT-Link II Interface

36

Appendix C - VCB-X LON Parameters

SNVTs for the VCB-X Controller

Binary Output SNVTs are SNVT_lev_disc

all other SNVTs are SNVT_count_inc_f

Parameter Name Object Description

Limits

Current

Supply Air

Temperature

Setpoint

SaTpStM Analog

Output

Current SAT

Cooling or

Heating

setpoint if there

is no reset

source;

Current

calculated SAT

setpoint with

Reset Source.

Cooldown

Mode Supply

Air Setpoint

SaCldnSt Analog

Input

Cooling will be

controlled to

this Supply Air

Setpoint during

Cool-Down.

30 80

Missing Sup-

ply Air CFM

Sensor

SaCfmSr Binary

Output

Indicates the

Supply Air

CFM Sensor is

not detected.

Warmup

Mode Supply

Air Setpoint

SaWmupSt Analog

Input

Heating will be

controlled to

this Supply Air

Setpoint during

Morning Warm-

Up.

40 240

SZ VAV Inte-

gral Constant

SZVAVFnl Analog

Input

This is the In-

tegral Constant

for controlling

the SZ VAV

Fan Speed.

010

Title 24

Economizer

Feedback

T24EcFb Analog

Output

Current posi-

tion of feedback

from Econo-

mizer actuator.

Title 24

Sensor Alarm

T24TpAlm Binary

Output

Outside Air

or Supply Air

Temperature

Sensor is

shorted or miss-

ing.

Title 24 Not

Economiz-

ing When It

Should

T24NEWS Binary

Output

Economizer is

enabled but not

following the

desired Econo-

mizer position

commanded.

Title 24

Economiz-

ing When It

Should Not

T24EWISN Binary

Output

Economizer is

not enabled but

the feedback

signal indicates

a position more

open than the

minimum.

SNVTs for the VCB-X Controller

Binary Output SNVTs are SNVT_lev_disc

all other SNVTs are SNVT_count_inc_f

Parameter Name Object Description

Limits

Title 24

Damper

Failure

T24DpAlm Binary

Output

Economizer is

enabled but not

within 10% of

desired position

within 150

seconds.

Title 24 Ex-

cess Outdoor

Air

T24ExsOA Binary

Output

Economizer

feedback is lost

or Economizer

is not following

commanded

position.

Unoccupied

Cooling

Offset

UnClOst Analog

Input

In Unoccupied

Mode, this

offsets the

Occupied Cool-

ing Setpoint by

this user adjust-

able amount. If

no Unoccupied

Cooling is

desired, use the

default setting

of 30°F for this

setpoint.

030

Unoccupied

Heating Offset

UnHtOst Analog

Input

In Unoccupied

Mode, this

offsets the

Occupied Heat-

ing Setpoint by

this user adjust-

able amount. If

no Unoccupied

Heating is

desired, use the

default setting

of 30°F for this

setpoint.

030

VFD

Position

VfdBwPos Analog

Output

Current

position of the

VFD blower

fan signal.

Remote VFD

Position

Setpoint

FrcFanSp Analog

Input

Override to

force the VFD

to this

percentage

speed. Conﬁ g-

uring “Auto”

will restore

normal unit

control of the

VFD speed.

0% 100%

Auto=65535

OnBoard

Relay

Status

OnRlys Analog

Output

See page 38.

Revised 7/7/14

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