Page 1
Siemens Industry, Inc.
125-5050, Rev. AA
Siemens BACnet ATEC
Owner's Manual
Page 2
Technical specifications and availability subject to change without notice.
© 2010 Copyright Siemens Industry, Inc.
We reserve all rights in this document and in the subject thereof. By acceptance of the document the recipient acknowledges these rights and
undertakes not to publish the document nor the subject thereof in full or in part, nor to make them available to any third party without our prior
express written authorization, nor to use it for any purpose other than for which it was delivered to him.
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Copyright Notice
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BACnet ATEC Owner's Manaul
125-5050, Rev. AA
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Copyright Notice
Notice
Document information is subject to change without notice by Siemens Industry, Inc.
Companies, names, and various data used in examples are fictitious unless otherwise
noted. No part of this document may be reproduced or transmitted in any form or by
any means, electronic or mechanical, for any purpose, without the express written
permission of Siemens Industry, Inc.
Warning
This equipment generates, uses, and can radiate radio frequency energy. If equipment
is not installed and used in accordance with the instructions manual, it may cause
interference to radio communications. Equipment has been tested and found to comply
within the limits for a Class B digital device pursuant to Part 15 of the FCC rules. These
limits are designed to provide reasonable protection against such interference when
operated in a commercial environment. Operation of this equipment in a residential
area is likely to cause interference. Residential area equipment users are required to
take whatever measures necessary to correct the interference at their own expense.
Service Statement
Control devices are combined to make a system. Each control device is mechanical in
nature and all mechanical components must be regularly serviced to optimize their
operation. Siemens Industry, Inc. branch offices and authorized distributors offer
Technical Support Programs that will ensure continuous, trouble-free system
performance.
For further information, contact your nearest Siemens Industry, Inc. representative.
Copyright 2010 by Siemens Industry, Inc.
FCC Regulations
The manual for an intentional or unintentional radiator shall caution the user that
changes or modifications not expressly approved by the party responsible could void
the user’s authority to operate the equipment.
For a Class B digital device or peripheral, the instructions furnished the user shall
include the following or similar statement, placed in a prominent location in the text of
the manual:
NOTE: This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to
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Copyright Notice
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radio communications. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following
measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
To the Reader
Your feedback is important to us. If you have comments about this manual, please
submit them to: mailto:Sbt_technical.editor.us.sbt@siemens.com
Credits
APOGEE, APOGEE GO, InfoCenter Administrator, InfoCenter Report Manager,
InfoCenter Server, InfoCenter Suite, Insight, Staefa, and TALON are registered
trademarks of Siemens Industry, Inc.
Other product or company names mentioned herein may be the trademarks of their
respective owners.
Printed in USA
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Copyright Notice ....................................................................................... 3
How To Use This Manual .......................................................................... 7
Chapter 1 – Product Overview ................................................................. 9
Hardware Inputs ...................................................................................................... 10
Hardware Outputs ................................................................................................... 10
Power Wiring ...................................................................................................... 11
Communication Wiring ....................................................................................... 12
Controller LED Indicators ................................................................................... 12
Temperature Sensors .............................................................................................. 13
Room Temperature Sensor ................................................................................ 13
Duct Temperature Sensor .................................................................................. 13
Related Equipment ............................................................................................. 13
Chapter 2 – Applications ........................................................................ 14
Basic Operation ....................................................................................................... 14
Sequencing Logic (optional) ............................................................................... 14
Control Temperature Setpoints .......................................................................... 14
Day/Night Mode .................................................................................................. 14
Night Mode Override Switch ............................................................................... 14
Control Loops ..................................................................................................... 14
Calibration .......................................................................................................... 15
Damper Status Operation ................................................................................... 15
Fail-safe Operation ............................................................................................. 15
Heating and Cooling Switchover ........................................................................ 15
Modulate Damper During Heating Mode (optional)............................................ 16
Hot Water Reheat ............................................................................................... 16
Electric Reheat ................................................................................................... 16
Notes .................................................................................................................. 16
Application 2860 VAV Cooling Only ........................................................................ 17
Application 2861 VAV Cooling or Heating ............................................................... 17
Application 2862 VAV with Electric Reheat or Baseboard Radiation ...................... 17
Baseboard Radiation .......................................................................................... 18
Electric Heat Interlock ........................................................................................ 18
Application 2863 VAV with Hot Water Reheat ........................................................ 18
Application 2864 VAV Series Fan Power ed with El ec tric Reheat ........................... 19
Fan Operation .................................................................................................... 19
Application 2865 VAV Series Fan Power ed with H ot Water Reheat ...................... 20
Fan Operation .................................................................................................... 20
Application 2866 VAV Parallel Fan Powered with Electric Reheat ......................... 20
Fan Operation .................................................................................................... 21
Application 2867 VAV Parallel Fan Powered with Hot Water Reheat ..................... 21
Fan Operation .................................................................................................... 22
Application 2897 Slave Mode .................................................................................. 22
Using Auxiliary Points ......................................................................................... 22
Table of contents
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Using the Controller as a Point Extension Device .............................................. 22
Chapter 3 – Point Database ................................................................... 24
Chaper 4 – Troubleshooting .................................................................. 30
Basic Service Information ........................................................................................ 30
Preventive Maintenance .......................................................................................... 30
Safety Features ....................................................................................................... 31
Controller LEDs ....................................................................................................... 31
Glossary .................................................................................................. 32
Index ........................................................................................................ 35
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How To Use This Manual
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How To Use This Manual
This manual is written for the owner and user of the Siemens Industry BACnet VAV
Actuator. It is designed to help you become familiar with the Siemens BACnet VAV
Actuator and its applications.
This section covers manual organization, manual conventions, symbols used in the
manual, and other information that will help you use this manual.
Manual Organization
This manual contains the following chapters:
Chapter 1, Hardware,
describes the hardware components and the accessories
that are used with the BACnet VAV Actuator.
Chapter 2, Applications for BACnet VAV Actuator,
describes the control
applications available in the model of the BACnet VAV Actuator that includes a
terminal block for wireable input/output connections.
Chapter 3, Point Database,
defines the point database descriptors and includes
address and applications.
Chapter 4, Troubleshooting,
describes basic corrective measures you can take
should you encounter a problem when using the BACnet VAV Actuator. For issues
not covered in this chapter, consult your local Siemens Industry representative.
The
Glossary
describes the terms and acronyms used in this manual.
The
Index
helps you locate information presented in this manual.
Manual Conventions
The following table lists conventions to help you use this manual in a quick and
efficient manner.
Convention
Examples
Numbered Lists (1, 2, 3…) indicate a
procedure with sequential steps.
1. Turn OFF power to the field panel.
2. Turn ON power to the field panel.
3. Contact y the local Siemens Building
Technologies representative.
Conditions that must be completed or met
before beginning a task are designated with a
⊳
.
Intermediate results (what will happen
following the execution of a step), are
designated with a
⇨.
Results, which inform the user that a task was
completed successfully, are designated with a
⇨.
⊳Composer software is properly installed.
⊳A Valid license is available.
1. Select
Start
>
Programs
>
Siemens
>
GMS
>
Composer
.
⇨
The Project Management window displays.
2. Open an existing project or create a new
one.
⇨
The project window displays.
Actions that should be performed are specified
in boldface font.
Type F for Field panels.
Click OK to save changes and close the
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How To Use This Manual
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Convention
Examples
dialog box.
Error and system messages are displayed in
Courier New font.
The message Report Definition
successfully renamed displays in the
status bar.
New terms appearing for the first time are
italicized.
The PXC Modular continuously executes a
user-defined set of instructions called the
control program
.
This symbol signifies Notes. Notes provide
additional information or helpful hints.
Cross references to other information are
indicated with an arrow and the page number,
enclosed in brackets: [→92]
For more information on creating flowcharts,
see Flowcharts [→92].
Manual Symbols
The following table lists the safety symbols used in this manual to draw attention to
important information.
Symbol
Meaning
Description
NOTICE
CAUTION
Equipment damage may occur if a procedure or instruction is not
followed as specified. (For online documentation, the NOTICE displays
in white with a blue background.)
CAUTION
Minor or moderate injury may occur if a procedure or instruction is not
followed as specified.
WARNING
Personal injury or property damage may occur if a procedure or
instruction is not followed as specified.
DANGER
Electric shock, death, or severe property damage may occur if a
procedure or instruction is not followed as specified.
Getting Help
For more information about the BACnet VAV Actuator, contact your local Siemens
Industry representative.
Where to Send Comments
Your feedback is important to us. If you have comments about this manual, please
submit them to SBT_technical.editor.us.sbt@siemens.com
Page 9
Chapter 1 – Product Overview
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Chapter 1 – Product Overview
The BACnet Actuating Terminal Equipment Controller (ATEC) is the Siemens Industry
FLN controller used in pressure independent Variable Air Volume applications (See the
following figure.). It provides Direct Digital Control (DDC) for eight applications, and
can operate independently as a stand-alone DDC room controller or networked with a
field panel. The controller provides all input/output, system, and local communication
connections. Hardware consists of the controller and the mounting bracket.
Table 1 lists the BACnet ATEC products that are covered:
Table 1. BACnet ATEC – Electronic Output Applications.
Application Number
Application Description
2860 VAV Cooling Only
2861 VAV Cooling or Heating
2862 VAV with Electronic Reheat or Baseboard
Radiation
2863 VAV with Hot Water Reheat
2864 VAV Series Fan Powered with Electric Reheat
2865 VAV Series Fan Powered with Hot Water
Reheat
2866 VAV Parallel Fan Powered with Electric
Reheat
2867 VAV Parallel Fan Powered with Hot Water
Reheat
2897 Slave Mode
Ordering Notes
Part Number
Description
550-440 BACnet ATEC Model 0001, cooling only (GDE)
550-441 BACnet ATEC Model 0001, cooling only (GLB)
550-445 BACnet ATEC Model 2301, full feature (GDE)
550-446 BACnet ATEC Model 2301, full feature (GLB)
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Chapter 1 – Product Overview
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Siemens BACnet ATEC
Hardware Inputs
Analog
Air Velocity Sensor (AVS)
Duct temperature sensor (optional) – Application 2861
Room temperature sensor (RTS)
Room temperature setpoint dial (optional)
Digital
Night mode override (optional)
Wall switch (optional)
Hardware Outputs
Analog
None
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Digital
Application
Damper Actuator All
Fan 2865, 2866, 2867
First valve actuator (required) 2863
Stage 1 electric reheat; or, 2-position heating valve 2862
Stage 1 electric reheat 2864, 2866
Stage 2 electric reheat (optional) 2862, 2864, 2866
Stage 3 electric reheat (optional) 2862
Valve actuator 2865, 2867
Power Wiring
The controller is powered by 24 Vac. Power wiring connects to the two screw terminals
on the controller labeled “C” (Common) and “H” (Hot) on the terminal block labeled “24
VAC”. No earth ground connection is required. See the following figure.
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Chapter 1 – Product Overview
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Communication Wiring
The controller connects to the field panel by means of a Floor Level Network (FLN)
trunk. Communication wiring connects to the three screw terminals on the controller
labeled “+” (positive), “-“(negative), and “S” (Shield). See the following figure.
Controller LED Indicators
The controller has six Light Emitting Diode (LED) indicators (see the figure
Siemens
BACnet ATEC
).
Controller LEDs.
LED Type
Label
(if present)*
LED
Number
Indication
DO LED 3 - LED 5 3 - 5 Indicates the ON/OFF status of the DO
associated with it. A glowing LED indicates
that the DO is energized.
Transmit TX 0 Indicates, when flashing, that the controller is
transmitting information to the field panel.
Receive RX 1 Indicates, when flashing, that the controller is
receiving information from the field panel.
BST
”Basic Sanity
Test”
BST 2 Indicates, when flashing ON and OFF once
per second, that the controller is functioning
properly.
* Some LED labels and numerals may be hidden by the controller cover.
See also
Chapter 1 – Product Overview [ 9]
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Chapter 1 – Product Overview
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Temperature Sensors
Room Temperature Sensor
The controller room temperature sensor connects to the controller by means of a cable
terminated at both ends with a six-conductor RJ-11 plug-in connector.
Duct Temperature Sensor
An optional duct temperature sensor provides duct air temperature sensing inputs to
the controller.
For more information about temperature sensors, contact your local Siemens Industry
representative.
Related Equipment
Autozero Module (optional) 540-200
Relay Module
Damper Actuator(s)
Duct Temperature Sensor (optional)
Room Temperature Sensor
Contact your local Siemens Industry representative for product numbers and more
information.
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Chapter 2 – Applications
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Chapter 2 – Applications
Basic Operation
The BACnet ATEC provides Direct Digital Control (DDC) for Variable Air Volume (VAV)
terminal box applications. Temperature control varies with the application. If present,
heating can be provided by hot water, up to three stages of electric reheat, or optional
baseboard radiation.
Sequencing Logic (optional)
This application has the additional capability to sequence the flow and mechanical
heating when heated supply air is available.
Control Temperature Setpoints
The controller maintains a specified temperature setpoint based on Day/Night mode, or
the heating/cooling mode, or the setpoint dial (if used).
Day/Night Mode
The controller maintains the specified day setpoint temperature during daytime hours
and the specified night setpoint at night.
Night Mode Override Switch
If the ROOM TEMPERATURE SENSOR has an override switch, it can be used to
command the controller into day mode for an adjustable period of time. This only
affects a controller in night mode.
Control Loops
Temperature Loop – Heating Loop – Cooling Loop
Maintain temperature setpoint by changing the flow setpoint or modulating the heat
source (valve/electric heat).
Flow Loop
Maintains flow setpoint by modulating the damper actuator.
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Chapter 2 – Applications
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Calibration
Air Velocity Sensor
Calibration of the controller's internal air velocity sensor is periodically required to
maintain accurate air velocity readings. Calibration may be set to take place
automatically or manually.
Autozero Module (AZM)
Used when damper cannot be closed and constant airflow is needed.
For a controller used with an AZM, calibration occurs without closing the damper.
Application 6520, 6521, 6522, 6523.
For a controller used without an AZM, the damper is briefly commanded closed to
get a zero airflow reading and an accurate damper position during calibration.
Application 6520, 6521, 6522, 6523.
Hot Water Valve
Calibration of a hot water valve (if used) is done by briefly commanding the valve
closed. Application 2863, 2865, 2867.
Damper Status Operation
It is possible, after a period of operation, for the calculated damper position to differ
from the actual (physical) damper position.
If this occurs, the controller will
automatically
compensate for any difference by
readjusting the calculated damper position. This calculated position may not match the
actual position.
Fail-safe Operation
If the air velocity sensor fails, the controller uses pressure dependent control. The
temperature loop controls the operation of the damper.
If the room temperature sensor fails, then the controller operates using the last known
temperature value.
Heating and Cooling Switchover
The heating/cooling switchover determines whether the controller is in heating or
cooling mode by monitoring the room temperature and the demand for heating and
cooling (as determined by the temperature control loops).
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Modulate Damper During Heating Mode (optional)
CAUTION
If the damper is set to modulate in heating mode, make sure the controller is in
the appropriate mode for the current supply air temperature.
Applications that have a heating source (valve/electric) can be configured to modulate
the flow setpoint in sequence with the heating source.
Hot Water Reheat
CAUTION
Do not set HTG FLOW MIN to 0 cfm (0 lps). A minimum airflow should be
provided across the heating coils when the heating valve is open.
When the controller is in cooling mode, the heating valve(s) are closed.
The heating loop modulates the heating valve(s) to warm up the room. In cooling
mode, the heating valve is closed.
Electric Reheat
CAUTION
Verify that the equipment is supplied with safeties by others to ensure that there
is airflow across the heating coils when they are to be energized.
The heating loop controls up to three stages of electric reheat to warm up the room.
The electric reheat is time modulated using a duty cycle. When the controller is in
cooling mode, the electric heat is OFF at all times.
Notes
1. If the temperature swings in the room are excessive or if there is trouble in
maintaining the setpoint, contact your local Siemens Industry representative for
more information.
2. The BACnet ATEC, as shipped from the factory, keeps all associated equipment
OFF. The controller and its equipment are released to application control at
start-up.
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Chapter 2 – Applications
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3. “Safeties by Others”: This note implies that the associated equipment has safety
features installed, for example adding mechanical stops to the dampers.
Application 2860 VAV Cooling Only
In Application 2860, the controller modulates the supply air damper of the terminal box
for cooling. In order for it to work properly, the central air-handling unit must provide
cool supply air.
See the following figure.
Application 2861 VAV Cooling or Heating
In Application 2861, the controller modulates the supply air damper of the terminal box
for cooling and heating. In order for it to work properly, the central air-handling unit
must provide cool supply air in cooling mode and warm air during heating mode.
See the following figure.
Application 2862 VAV with Electric Reheat or Baseboard Radiation
In Application 2862, the controller modulates the supply air damper of the terminal box
for cooling and controls stages of electric reheat or baseboard radiation for heating.
When in heating, the terminal box either maintains minimum airflow or modulates the
supply air damper. In order for the terminal box to work properly, the central airhandling unit must provide supply air.
See the following figure.
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Chapter 2 – Applications
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Baseboard Radiation
Baseboard radiation can be a two-position valve or electrical resistance heating.
If the controller is in cooling mode, the heating valve is closed. When in heating mode,
the controller will operate the heating valve to maintain the heating setpoint.
Electric Heat Interlock
CAUTION
Do not set EHEAT FLOW (the defined minimum) to less than 5%; otherwise, the
electric heat interlock will be disabled.
The electric heat stages will be disabled (turned off) when the electric heat airflow is
less than the defined minimum.
Application 2863 VAV with Hot Water Reheat
In Application 2863, the controller modulates the supply air damper of the terminal box
for cooling and controls a hot water valve or baseboard radiation for heating. When in
heating, the terminal box either maintains minimum airflow or modulates the supply air
damper. In order for the terminal box to work properly, the central air-handling unit
must provide supply air for cooling.
See the following figures.
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Chapter 2 – Applications
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Application 2864 VAV Series Fan Powered with Electric Reheat
In Application 2864, the controller modulates the supply air damper of the terminal box
for cooling and controls stages of electric reheat for heating. When in heating, the
terminal box either maintains minimum airflow or modulates the supply air damper.
Application 2864 has a series fan for air circulation. In order for the terminal box to
work properly, the central air-handling unit must provide supply air.
See the following figure.
Fan Operation
CAUTION
On series fan powered terminal boxes, the terminal box fan must be
controlled/interlocked to start either before or at the same time as the central air
handler. Failure to do so may cause the terminal box fan to rotate backwards and
cause consequent damage at start up.
In day mode, the fan is ON all the time. In night mode, the fan cycles on when heating
or cooling is required.
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Chapter 2 – Applications
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[insert TEC2564CD]
Application 2865 VAV Series Fan Powered with Hot Water Reheat
In Application 2865, the controller modulates the supply air damper of the terminal box
for cooling and modulates a hot water valve for heating. When in heating, the terminal
box either maintains minimum airflow or modulates the supply air damper. Application
2865 has a series fan for air circulation. In order for the terminal box to work properly,
the central air-handling unit must provide supply air.
See the following figure.
Fan Operation
CAUTION
On series fan powered terminal boxes, the terminal box fan must be
controlled/interlocked to start either before or at the same time as the central air
handler. Failure to do so may cause the terminal box fan to rotate backwards and
cause consequent damage at start up.
In day mode, the fan is ON all the time. In night mode, the fan cycles on when heating
or cooling is required.
Application 2866 VAV Parallel Fan Powered with Electric Reheat
In Application 2866, the controller modulates the supply air damper of the terminal box
for cooling and controls stages of electric reheat for heating. When in heating, the
terminal box either maintains minimum airflow or modulates the supply air damper.
Application 2866 has a parallel fan that re-circulates the room air. In order for the
terminal box to work properly, the central air-handling unit must provide supply air.
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See the following figure.
Fan Operation
The fan turns on when heating is required.
[insert TEC2566CD]
Application 2867 VAV Parallel Fan Powered with Hot Water Reheat
In Application 2867, the controller modulates the supply air damper of the terminal box
for cooling and modulates a hot water valve for heating. When in heating, the terminal
box either maintains minimum airflow or modulates the supply air damper. Application
2867 has a parallel fan that re-circulates the room air. In order for the terminal box to
work properly, the central air-handling unit must provide supply air.
See the following figure.
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Chapter 2 – Applications
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Fan Operation
The fan turns on when heating is required.
[insert TEC2567CD]
Application 2897 Slave Mode
Application 2897 is the slave mode application for the BACnet ATEC (see Ordering
Notes [ 9] for product numbers). Slave mode is the default application that comes up
when power is first applied to the controller. Slave mode provides no control. Its
purpose is to allow the operator to perform equipment checkout before a control
application is put into effect and to set some basic controller parameters (CTLR
ADDRESS, APPLICATION, etc.). A controller in default state can also be used as a
point extension device by unbundling spare I/O points at the field panel.
Using Auxiliary Points
It is possible to have extra points available on a BACnet VAV Controller — Electronic
Output in addition to the ones used by the current application that is running in the
controller. If these extra points are to be controlled by a field panel, then they must be
unbundled at the field panel.
Using the Controller as a Point Extension Device
If the controller is only used as a point extension device, with no control application in
affect, its application must be set to slave mode and points must be unbundled at the
field panel. All points must be controlled from the field panel in order to be used.
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DO 3, DO 4, and DO 5 may be used as separate DOs or in pairs to control a motor as
shown in the example.
NOTE:
If using either a motor or DOs as auxiliary points, be sure to set MTR SETUP to
the correct value. If using a pair of DOs to control a motor, then the DOs cannot
be unbundled. Only MTR COMD can be unbundled to control the motors.
Contact your local Siemens Industry representative for other combinations of DOs and
motors.
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Chapter 3 – Point Database
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Chapter 3 – Point Database
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
Address1
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.
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 CLG STPT 08 All
except
2597 The temperature setpoint in degrees that the controller
maintains during the night periods in cooling mode.
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.
RM STPT MAX 12 All
except
2597 The maximum temperature setpoint in degrees that the
controller can use from the setpoint dial. This overrides any
temperature setpoint from the setpoint dial that falls above this
maximum.
RM STPT DIAL {13}2 All The temperature setpoint in degrees from the room
temperature sensor (not available on all temperature sensor
models). This setpoint will be used for control in day mode
(heating or cooling) when enabled by STPT DIAL.
STPT DIAL 14 All
except
2597 YES indicates that there is a room setpoint dial on the room
temperature sensor and it should be used as the temperature
setpoint for control in day/occupied mode. NO indicates that
the appropriate preset setpoint will be used as the
temperature setpoint for control in day/occupied heating or
cooling mode. Valid input: YES or NO.
AUX TEMP UI 1 {15} All except 2561 Actual reading from a 10K thermistor connected to the
controller's Ul 1 input. When a thermistor is connected at Ul 1,
UI 1 is not available. See UI 1.
SUPPLY TEMP {15} 2561 Actual reading from a 10K thermistor connected to the
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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
2560, 2561, 2597
Determines how the damper modulation will be sequenced
while in heating mode. When HTG LOOPOUT is above this
value, then FLOW STPT starts to increase.
FLOW END 17 All
except
2560, 2561, 2597
Determines how the damper modulation will be sequenced
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
2597
The amount of time in hours that the controller will operate in
day/occupied mode when the override switch is pressed while
the controller is in night/unoccupied mode.
NGT OVRD {21}2 All
except
2597
Indicates the mode that the controller is operating in with
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
2560, 2561, 2597
Determines how the reheat modulation will be sequenced
while in heating mode. When HTG LOOPOUT is above this
value, then the reheat modulates upward.
REHEAT END 23 All
except
2560, 2561,
2597
Determines how the reheat modulation will be sequenced
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
2561
Actual status of a contact connected to the controller UI 1. ON
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,
2567
When flow rises above this value, the parallel fan will turn
OFF.
CLG FLOW MIN 31 All
except
2597 The minimum amount of air in CFM (LPS) to be supplied to
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Descriptor
Address1
Application
Description
the space in cooling mode.
CLG FLOW MAX 32 All
except
2597 The maximum amount of air in CFM (LPS) to be supplied to
the space in cooling mode.
HTG FLOW MIN 33 All
except
2560, 2597 The minimum amount of air in CFM (LPS) to be supplied to
the space in heating mode.
HTG FLOW MAX 34 All
except
2560, 2597 The maximum amount of air in CFM (LPS) to be supplied to
the space in heating mode.
AIR VOLUME {35}2 All Actual amount of air in CFM (LPS) currently passing through
the air velocity sensor.
FLOW COEFF 36 All Calibration factor for the airflow sensor.
DO 3 {43} All
except
2562, 2564, 2566
Digital output 3 controls a 24 Vac load with an ON or OFF
status. If Motor 2 is enabled, DO 3 is coupled with DO 4 to
control an actuator.
HEAT STAGE 1 {43} 2562, 2564, 2566 This point is DO 3 in applications with electric reheat. This
digital output controls the contact for the first stage of heating
and has a status of ON or OFF.
DO 4 {44} All
except
2562, 2564, 2566
Digital output 4 controls a 24 Vac load with an ON or OFF
status. If Motor 2 is enabled, DO 4 is coupled with DO 3 to
control an actuator.
HEAT STAGE 2 {44} 2562, 2564, 2566 This point is DO 4 in applications with electric reheat. This
digital output controls the contact for the second stage of
heating and has a status of ON or OFF.
DO 5 {45} 2560, 2561, 2563,
2597
Digital output 5 controls a 24 Vac load with an ON or OFF
status. If Motor 3 is enabled, DO 5 is coupled with DO 6 to
control an actuator.
DO 5 {45} 2565, 2567 Digital output 5 controls a 24 Vac load with an ON or OFF
status.
HEAT STAGE 3 {45}2 2562, 2564, 2566 This point is a digital output used to control the contact for the
third stage of heating and has a status of ON or OFF.
FAN {46} 2564, 2565, 2566,
2567
This point is a digital output used to control the fan. ON
indicates that the DO is energized; OFF indicates that the DO
is de-energized.
DMPR COMD {48} All
except
2597 The value to which the damper motor is commanded in
percent of full travel.
MTR1 COMD {48} 2597 The value to which the Motor 1 actuator is commanded in
percent of full travel.
DMPR POS {49} All
except
2597 The current position of the damper motor in percent of full
travel. This value is calculated based on motor run time.
MTR1 POS {49} 2597 The current position of Motor 1 in percent of full travel. This
value is calculated based on motor run time. See MTR1
TIMING.
MTR1 TIMING 51 All The time required for the Motor 1 actuator to travel from full
closed to the full open position.
MTR2 COMD {52}2 2560, 2561, 2597 The value to which the Motor 2 actuator is commanded in
percent of full travel (for use as an auxiliary slave point).
VLV COMD {52} 2565, 2567 The value to which the valve actuator is commanded in
percent of full travel for applications using a water valve.
VLV1 COMD {52} 2563 The value to which the valve 1 actuator is commanded in
percent of full travel for applications using a water valve.
MTR2 POS {53} 2560, 2561, 2597 The current position of the Motor 2 actuator in percent of full
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Descriptor
Address1
Application
Description
travel (for use as an auxiliary slave point). This value is
calculated based on motor run time. See MTR2 TIMING.
VLV POS {53} 2565 The current position of the valve in percent of full travel for
applications using a water valve. This value is calculated
based on motor run time.
VLV1 POS {53} 2563 The current position of valve 1 in percent of full travel for
applications using a water valve. This value is calculated
based on motor run time.
MTR2 TIMING 55 All
except
2562, 2564, 2566
The time required for the Motor 2 actuator to travel from full
closed to the full open position.
DMPR ROT ANG 56 All
except
2597 The number of degrees the damper is free to travel.
DPR1 ROT ANG 56 2597 The number of degrees that damper 1 is free to travel.
DPR2 ROT ANG 57 2597 The number of degrees that damper 2, the hot duct damper, is
free to travel.
MTR SETUP 58 All The configuration setup code for Motors 1 and 2. This enables
the motors individually and sets each motor to be either direct
or reverse acting.
Note: When a motor is enabled, its associated DOs are
enabled.
DO DIR.REV 59 All The configuration setup code for DOs. Allows the DOs to be
direct or reverse acting (enabled equals energized or disabled
equals de-energized).
EHEAT FLOW 60 2562 The flow required before the electric heat will be enabled.
COOL TEMP 61 2561 The discharge air temperature where the controller will switch
from heating to cooling mode. Used only in applications with
SUPPLY TEMP.
HEAT TEMP 62 2561 The discharge air temperature where the controller will switch
from cooling to heating mode. Used only in applications with
SUPPLY TEMP.
CLG P GAIN 63 All
except
2597 The proportional gain value for the cooling temperature
control loop.
CLG l GAIN 64 All
except
2597 The integral gain value for the cooling temperature control
loop.
CLG D GAIN 65 All
except
2597 The derivative gain value for the cooling temperature control
loop.
CHK OUT 66 All The procedure tests all of the necessary I/O and ensures the
controller has the ability to operate within the set airflow
range, between CLG FLOW MIN and CLG FLOW MAX.
HTG P GAIN 67 All
except
2560, 2597
The proportional gain value for the heating temperature
control loop.
HTG l GAIN 68 All
except
2560, 2597 The integral gain value for the heating temperature control
loop.
HTG D GAIN 69 All
except
2560, 2597 The derivative gain value for the heating temperature control
loop.
CHK STATUS 70 All Displays the results of CHK OUT.
FLOW P GAIN 71 All
except
2597 The proportional gain value for the flow control loop.
FLOW l GAIN 72 All
except
2597 The integral gain value for the flow control loop.
FLOW D GAIN 73 All
except
2597 The derivative gain value for the flow control loop.
FLOW BIAS 74 All
except
2597 The biasing of the flow control loop.
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Descriptor
Address1
Application
Description
FLOW {75}2 All
except
2597 Indicates the amount of air currently passing the air velocity
sensor. The value is calculated as a percentage based on
where the value of AIR VOLUME is in the range between 0
and CTL FLOW MAX.
CTL FLOW MIN {76}2 All
except
2597 The active minimum flow used as a limit for the flow control
loop. This value is the same as CLG FLOW MIN if the
controller is in cooling mode, or is the same as HTG FLOW
MIN if the controller is in heating mode, unless it is overridden.
CTL FLOW MAX {77} All
except
2597 The active maximum flow used as a limit for the flow control
loop. This value is the same as CLG FLOW MAX if the
controller is in cooling mode, or is the same as HTG FLOW
MAX if the controller is in heating mode unless, it is
overridden.
CTL TEMP {78} All
except
2597 The temperature used as input for the temperature control
loops. This value is the same as the value in ROOM TEMP
and RM TEMP OFFSET unless it is overridden.
CLG LOOPOUT {79} All
except
2597 The cooling temperature control loop output value in percent.
HTG LOOPOUT {80} All
except
2560, 2597 The heating temperature control loop output value in percent.
AVG HEAT OUT {81}2 2562, 2564, 2566 This point is used to determine what stages of electric heat
are used for a given loop output value. The ranges for the
value are determined by the number of stages used: 0 to 100
for 1 stage of electric heat, 0 to 200 for 2 stages of electric
heat, and 0 to 300 for 3 stages of electric heat.
With electric heat, this value is equal to: HTG LOOPOUT ×
STAGE COUNT.
STAGE MAX 82 2562, 2564, 2566 The value, in percent, which the heating loop must exceed for
the electric heat to be ON for the full duty cycle (STAGE
TIME).
STAGE FAN 83 2565, 2567 The valve must be opened greater than this value before the
fan will turn ON.
STAGE MIN 83 2562, 2564, 2566 The value, in percent, which the heating loop must go below
for the electric heat to be OFF for the full duty cycle (STAGE
TIME).
DMPR STATUS {84}2 2560, 2561, 2562,
2563
This point is used only when CAL MODULE set to YES. It
readjusts the damper position if the command value is not
equal to the actual position of the damper. CAL indicates that
the damper is operating normally. RECAL indicates that the
damper position was adjusted (recalibrated) by 25% because
the desired airflow was not obtainable under its current status.
SWITCH LIMIT 85 All
except
2560, 2561, 2597
The active temperature control loop output must be less than
this value to switch between cooling mode and heating mode.
Actual switchover depends on SWITCH DBAND being
exceeded and is subject to SWITCH TIME being expired.
SWITCH TIME 86 All
except
2560, 2561, 2597
The time, in minutes, before the heat/cool mode can change
over when the other parameters are appropriate.
STAGE COUNT 88 2562, 2564, 2566
The number of electric heating stages used by the application.
DOs associated with unused stages may be used as spare
DOs.
VALVE COUNT 88 2563 The number of heating valves available.
STAGE TIME 89 2562, 2564, 2566 The cycle time in minutes for the electric reheat stages. For
example, if there are three stages of electric heat and STAGE
TIME = 10 minutes, STAGE COUNT = 3, and AVG HEAT
OUT = 150% then, Stage 1 is ON for 10 minutes (100% of the
time), Stage 2 is ON for 5 minutes (50% of 10 minutes) and
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Descriptor
Address1
Application
Description
OFF for 5 minutes, and Stage 3 is OFF.
SWITCH DBAND 90 All
except
2560, 2561, 2597
The temperature range in degrees which is compared to the
difference between CTL TEMP and CTL STPT. The difference
must exceed this value for temperature control mode to
change over. Changeover is also subject to the active
temperature control loop output being below SWITCH LIMIT
(Point 85) and SWITCH TIME being expired.
CTL STPT {92} All
except
2597
The actual setpoint value being used as input for the active
temperature control loop.
FLOW STPT {93} All
except
2597
The setpoint of the flow control loop.
CAL AIR {94} All YES commands the controller to go through calibration
sequence for the air velocity transducers. YES is also
displayed when the calibration sequence is started
automatically. CAL AIR automatically returns to NO after the
calibration sequence is completed. Valid input: YES or NO.
CAL SETUP 95 All The configuration setup code for the calibration sequence
options.
CAL TIMER 96 All Time interval, in hours, between the calibration sequence
initiations if a timed calibration option is selected in CAL
SETUP.
DUCT AREA 97 All Area, in square feet (square meters), of the duct where the air
velocity sensor is located. This is a calculated value
(calculated by the field panel or computer being used) that
depends on duct shape and size. It is used in calculating all
points in units of CFM, CF, LPS and L.
Valid input: .025 ft2 (.002 m2) through 6.375 ft2 (.5923 m2).
LOOP TIME 98 All
except
2597
The time, in seconds, between control loop calculations.
ERROR STATUS {99}2 All The status code indicating any errors detected during
controller power up. A status of 0 indicates there are no
problems.
UI 1 CFG 102 All Configuration point for universal input 1 (digital, analog –
thermistor, 0 to 10V or 4 to 20mA).
PERCENT UI1 {103} All Universal input 1 when configured as 0 to 10V or 4 to 20 mA.
UI2 CFG 104 All Configuration point for universal input 2 (digital, analog –
thermistor, 0 to 10V or 4 to 20 mA).
PERCENT UI2 {105} All Universal input 2 when configured as 0 to 10V or 4 to 20 mA.
AIR ALTITUDE 106 All Optional correction factor for flow sensor based on altitude.
TUBE LEN 107 All
Optional correction factor for flow sensor based on tube length
of air tube pickup.
TUBE DIAMETE 108 All Tube diameter (inside) of air tube pickup.
AUX TEMP UI2 {109} All Temperature sensor (when UI 2 is configured for 10K
thermistor).
STAT SUPV 126 All Room unit configuration point, values are additive.
RM RH 127 All Room humidity when room unit is provided with humidity
sensing.
1)
Points not listed are not used in this application.
2)
Point numbers that appear in brackets { } may be unbundled at the field panel.
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Chaper 4 – Troubleshooting
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Chaper 4 – Troubleshooting
This chapter describes corrective measures you can take should you encounter a
problem when using a BACnet ATEC.
You are not required to do any controller troubleshooting. You may want to contact
your local Siemens Industry representative if a problem occurs or you have any
questions about the controller.
NOTE:
When troubleshooting, record what the problem is and what actions were
performed immediately before the problem occurred. Being able to describe the
problem in detail is important, should you need assistance from your local
Siemens Industry representative.
Basic Service Information
Always remove power to the BACnet ATEC when installing or replacing it. Since the
controller does not have a power switch, the recommended method of removing power
to a locally powered controller is to turn OFF the power to the 24 Vac transformer. The
recommended method of removing power to a controller on a power cable (even to
service a single controller) is to turn OFF the power at the transformer.
NOTE:
When removing power to a controller to perform maintenance or service, make
sure that the person in charge of the facility is aware of this and that appropriate
steps are taken to keep the building in control.
Never remove the cover from the BACnet ATEC. There are no serviceable parts
inside. If a problem is found with this device, contact your local Siemens Building
Technologies representative for replacement. An anti-static wrist strap is
recommended when installing or replacing controllers.
Preventive Maintenance
Most controller components are designed so that, under normal circumstances, they
do not require preventive maintenance. Periodic inspections, voltage checks, and point
checks are normally not required. The rugged design makes most preventive
maintenance unnecessary. However, devices that are exposed to dusty or dirty
environments may require periodic cleaning to function properly.
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Safety Features
The controller board stores the controller's address, applications, and point values. In
the event of a power failure or a reset, these values are retrieved from the controller's
permanent memory and are used by the controller unless overridden by a field panel. If
one of the following conditions occurs, the controller will activate safety features
present in its fail-safe mode.
Sensor failure.
Loss of power. Upon controller power loss, communication with the controller is
also lost. The controller will appear as failed (*F*) at the field panel.
Controller LEDs
NOTE:
The TX and RX LEDs indicate communication over the FLN.
To determine if the controller is powered up and working, verify that the Basic Sanity
Test (BST) Light Emitting Diode (LED) is flashing ON/OFF once per second. The
controller contains seven LEDs located on the circuit board. See the Controller LED
lndicators [ 12] section of Chapter 1 - Product Overview [ 9] for more information
about LEDs.
Page 32
Glossary
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Glossary
The glossary contains terms and acronyms that are used in this manual. For definitions
of point database descriptors, see Chapter 3 - Point Database [ 24] , in this manual.
airflow
Rate at which a volume of air moves through a duct. Usually expressed in cubic feet
per minute (cfm) or liters per second (lps).
algorithm
Mathematical formula that uses varying inputs to calculate an output value.
AVS
Air Velocity Sensor.
centralized control
Type of control offered by a controller that is connected by means of Field Level
Network (FLN).
cfm
Cubic Feet per Minute.
control loop
PID algorithm that is used to control an output that is based on a setpoint and an input
reading from a sensor.
DDC
Direct Digital Control.
DO
Digital Output. Physical output point that sends a two-state signal (ON/OFF,
OPEN/CLOSED, YES/NO).
English units
The foot-pound-second system of units for weights and measurements.
equipment controller
FLN device that provides additional point capacity to a field panel or provides individual
room or mechanical equipment control.
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Glossary
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field panel
A device containing a microprocessor for centralized control of system components
and equipment controllers.
FLN
Field Level Network. Network consisting of equipment controllers, FLN end devices,
fume hoods, etc.
lps
Liters per Second.
loopout
Output of the control loop expressed as a percentage.
HMI
Human Machine Interface. Terminal and its interface program that allows you to
communicate with a field panel or equipment controller.
override switch
Button on a room temperature sensor that an occupant can press to change the status
of a room from unoccupied to occupied (or from night to day) for a predetermined time.
pressure independent
Variable Air Volume (VAV) room temperature control system in which the temperature
drives an airflow setpoint.
PID
Proportional, Integral, Derivative.
RTS
Room Temperature Sensor.
setpoint
Virtual point that stores a point value such as a temperature setting. Points that monitor
inputs, such as temperature, report actual values.
SI units
Systeme International d'Unites. The international metric system.
Page 34
Glossary
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slave mode
Default application that displays when power is first applied to an equipment controller.
No control action is initiated in the slave mode.
stand-alone control
Type of control offered by a controller that is providing independent DDC control to a
space.
Terminal Equipment Controller
Siemens Industry, Inc. product family of equipment controllers (one is the BACnet VAV
Controller - Electronic Output) that house the applications software used to control
terminal units, such as heat pumps, VAV terminal boxes, fan coil units, unit ventilators,
etc.
UI
Universal Input. Can be used as an AI or DI. An AI input is a point receiving a signal
that represents a condition that has more than two states. A DI input is a physical input
point that receives a two-state signal.
unbundle
Term used to describe the entering of a point that resides in a controller's database
into the field panel's database so that it can be monitored and controlled from the field
panel.
VAV
Variable air volume. Ventilation system that changes the amount of air supplied to and
exhausted from the rooms served.
Page 35
Index
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Index
A
Air Velocity Sensor (AVS), 12
algorithm, 33
application 2562
baseboard radiation, 11
application 2564
control drawing, 21
Application 2564
fan operation, 21
application 2566
control drawing, 23
fan operation, 23
application 2567
control drawing, 24
Application 2567
fan operation, 24
Application 2597
using auxiliary points, 24
application 2860
control drawing, 19
overview, 19
application 2861
control drawing, 19
overview, 19
application 2862
baseboard radiation, 20
control drawing, 19
electric heat, 20
electric heat interlock, 20
overview, 19
application 2863
control drawing, 20
overview, 20
application 2864
overview, 21
application 2865
overview, 22
Application 2865
fan operation, 22
application 2866
overview, 23
application 2867
overview, 23
Application 2897
overview, 24
using controller as point extension device, 24
applications
calibration, 17, 27
control loops, 16
control temperature setpoints, 16
damper status operation, 17
day/night mode, 16
electric reheat:stage 1, 11, 18, 21, 23
electric reheat:stage 2, 11, 18, 21, 23
electric reheat:stage 3, 18
fail-safe operation, 17
heating and cooling switchover, 17
hot water reheat, 11, 18, 20, 22, 23
modulate damper during heating mode, 18
night mode override switch, 16
notes, 11, 18
sequencing logic, 16
Page 36
Index
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B
Basic Sanity Test (BST), 32
basic service information, 31
BST LED, 32
C
centralized control, 33
communication wiring, 14
control loop, 33
controller
LEDs/LED indicators, 32
D
DDC, 33
Direct Digital Control (DDC), 11, 16
DO, 33
E
English units, 33
equipment controller, 33, 35
F
fan, 11, 13, 21, 22, 23, 24
FLN, 34
Floor Level Network (FLN), 14
H
hardware
autozero module, 17
fan, 11, 13, 21, 22, 23, 24
LEDs, 14
power wiring, 13
relay module, 15
temperature sensors, 15
L
Light Emitting Diodes (LEDs), 32
BST, 32
RX and TX, 32
loopout, 34
O
override switch, 34
P
PID, 34
point database
overview, 25
power wiring, 13
preventive maintenance, 31
R
related equipment, 15
relay module, 15
RTS, 34
RX LED, 32
S
safety features, 32
service information, basic, 31
SI units, 34
stand-alone control, 35
static discharge, 31
T
temperature sensors
duct temperature sensor, 15
RTS, 15
troubleshooting, 31
basic service information, 31
TX LED, 32
U
units, English, 33
V
valve
2-position heating, 13
Page 37
Index
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W
wiring
communication wiring, 14
power wiring, 13
Page 38
Issued by
Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089, USA
Tel. +1 847-215-1000
© 2010 Copyright Siemens Industry, Inc.
Technical specifications and availability subject to change without notice.
Document ID
125-5050, Rev. AA
Manual Siemens BACnet ATEC
Owner's Manual
Edition
4/20/2010
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