Chapter 3 – Point Database

 

 

 

 

Descriptor

Address1

Application

Description

 

 

 

controller's Ul 1 input. The controller uses this value to

 

 

 

determine whether it is in heating or cooling mode.

FLOW START

16

All except

Determines how the damper modulation will be sequenced

 

 

2560, 2561, 2597

while in heating mode. When HTG LOOPOUT is above this

 

 

 

value, then FLOW STPT starts to increase.

FLOW END

17

All except

Determines how the damper modulation will be sequenced

 

 

2560, 2561, 2597

while in heating mode. When HTG LOOPOUT is below this

 

 

 

value, then FLOW STPT starts to decrease.

WALL SWITCH

18

All

YES indicates that the controller is to monitor the status of a

 

 

 

wall switch that is connected to UI 2. NO indicates that the

 

 

 

controller will not monitor the status of a wall switch, even if

 

 

 

one is connected. Valid input: YES or NO.

DI OVRD SW

{19}2

All

Actual indication of the status of the override switch (not

 

 

 

physically available on all temperature sensor models) at the

 

 

 

room temperature sensor. ON indicates that the switch is

 

 

 

being pressed. OFF indicates that the switch is released.

 

 

 

Valid input: ON or OFF.

OVRD TIME

20

All except

The amount of time in hours that the controller will operate in

 

 

2597

day/occupied mode when the override switch is pressed while

 

 

 

the controller is in night/unoccupied mode.

NGT OVRD

{21}2

All except

Indicates the mode that the controller is operating in with

 

 

2597

respect to the override switch. NIGHT indicates that the switch

 

 

 

has not been pressed and the override timer is not active.

 

 

 

DAY indicates that the switch has been pressed and the

 

 

 

override timer is active. The controller then uses a day mode

 

 

 

temperature setpoint. This point is only in effect when

 

 

 

DAY.NGT indicates night mode.

REHEAT START

22

All except

Determines how the reheat modulation will be sequenced

 

 

2560, 2561, 2597

while in heating mode. When HTG LOOPOUT is above this

 

 

 

value, then the reheat modulates upward.

 

 

 

 

REHEAT END

23

All except 2560, 2561,

Determines how the reheat modulation will be sequenced

 

 

2597

while in heating mode. When HTG LOOPOUT is below this

 

 

 

value, then the reheat modulates downward.

 

 

 

 

DIGITAL UI 2

{24}

All

Actual status of a contact connected to the controller at UI 2.

 

 

 

ON indicates that the contact is closed; OFF indicates that the

 

 

 

contact is open. If a wall switch is used, it is connected to UI

 

 

 

2. See WALL SWITCH.

DIGITAL UI 1

{25}2

All except

Actual status of a contact connected to the controller UI 1. ON

 

 

2561

indicates that the contact is closed; OFF indicates that the

 

 

 

contact is open. When a contact is connected as a digital

 

 

 

input, the analog input is not available. See AUX TEMP.

SERIES ON

26

2564, 2565

When flow rises above this value, the series fan will turn ON.

 

 

 

 

SERIES OFF

27

2564, 2565

When flow drops below this value and other conditions have

 

 

 

been met, the series fan will turn OFF.

PARALLEL ON

28

2566, 2567

When flow drops below this value and other conditions have

 

 

 

been met, the parallel fan will turn ON.

DAY.NGT

{29}

All

Indicates the mode in which the controller is operating. Day

 

 

 

temperature setpoints will be used in day mode. Night

 

 

 

temperature setpoints will be used in night mode. This point is

 

 

 

normally set by the field panel.

PARALLEL OFF

30

2566,

When flow rises above this value, the parallel fan will turn

 

 

2567

OFF.

CLG FLOW MIN

31

All except 2597

The minimum amount of air in CFM (LPS) to be supplied to

 

 

 

 

 

 

 

 

25

 

 

 

 

 

 

Siemens Industry, Inc.

 

 

BACnet ATEC Owner's Manaul

125-5050, Rev. AA

 

 

4/20/2010

 

Page 25
Image 25
Siemens 125-5050 owner manual Descriptor Address1