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Point database, Overview – Siemens BACNET 125-5037 User Manual

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Siemens Building Technologies, Inc.

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3

Point Database

Overview

Chapter 3 presents a description of the BACnet VAV Controller — Electronic Output point
database, including point descriptors, point addresses, and a listing of applications in which
each point is found.

Descriptor Address

1

Application Description

CTLR ADDRESS

01

All

Identifies the controller on the FLN trunk.

APPLICATION 02

All Identification

number of the program running in the

controller.

RMTMP OFFSET

03

All

Compensates for deviations between the value of
ROOM TEMP and the actual room temperature.
This corrected value is displayed in CTL TEMP.
RMTMP OFFSET + ROOM TEMP = CTL TEMP

ROOM TEMP

{04}

2

All

Actual reading from the room temperature sensor.

HEAT.COOL {05} All

except

2560, 2597

Current mode of operation for applications that can
be in either a heating mode or a cooling mode.

DAY CLG STPT

06

All except 2597

The temperature setpoint in degrees that the
controller maintains during day periods in cooling
mode if a room temperature sensor setpoint dial is
not present or is not used. See STPT DIAL.

NGT CLG STPT

08

All except 2597

The temperature setpoint in degrees that the
controller maintains during the night periods in
cooling mode.

DAY HTG STPT

07

All except 2560,

2597

The temperature setpoint in degrees that the
controller maintains during day periods in heating
mode if a room temperature sensor setpoint dial is
not present or is not used. See STPT DIAL.

NGT HTG STPT

09

All except 2560,

2597

The temperature setpoint in degrees that the
controller maintains during the night periods in
heating mode.

RM STPT MIN

11

All except 2597

The minimum temperature setpoint in degrees that
the controller can use from the setpoint dial. This
overrides any temperature setpoint from the
setpoint dial that falls below this minimum.