DEOS VAV T4 RT Bedienungsanleitung

VAV T4 RT-BACnet Guide-170602.docx

VAV Zone Controller

VAV T4 RT

BACnet Communication Module User Guide

Zoning System

VAV T4 RT VAV Zone Controller

BACnet Communication Module User Guide

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Introduction

The VAV T4 RT VAV Zone Controller BACnet®Communication Module User Guide provides information about using

the controllers in the zoning system with BACnet communications feature. The BACnet communication protocol for

building automation and control networks enables communication between client devices within a network. The

controller provides a BACnet network interface between BACnet client devices and DEOS Controller series devices. It

uses the BACnet Master Slave/Token Passing (MS/TP) protocol at the BACnet MAC layer.

Pre-requisites

The BACnet communication user guide assumes that you are familiar with the concepts of BACnet and its

terminology.

Advantages of BACnet

BACnet enabled controllers have the following advantages:

Quick Message Transmission. The controller uses a synchronous implementation for BACnet messages

making it quick and efficient. Each BACnet confirmed service request is answered as quickly as possible

without using the Reply Postponed frame. The MS/TP implementation is performed within Tusage_delay of

15 minutes to ensure a Tusage_timeout value within 20 minutes.

MS/TP Support. The controller supports a Full Master Node state machine for MS/TP. The Max_Master and

the instances are configured to the device object through BACnet WriteProperty service or via the device's

Programming Mode. The MAC address and the MS/TP baud rate setting of 9600, 19200, 38400, and 76800

are also set through the BACnet Write Property service or via the device's Programming Mode. In

Programming mode, the device is configured through the device’s keypad. For more information about the

WriteProperty, refer to Table 3 - Object Types Supported.

BIBB Support. The controller functions the same way as the B-ASC type profile server and supports the

specific BIBB as per their relevant definitions.

oDS-RP-B

oDS-RPM-B

oDS-WP-B

oDS-WPM-B

oDM-DCC-B

oDM-DDB-B

oDM-DOB-B

oDM-RD-B

oDM-TS-B

oDM-UTC-B

oDS-COV-B

oDS-COVP-B

oSCHED-WS-I-B

Object Support. The controller supports a fixed list of BACnet visible values, which appear as Present_Values

of various BACnet standard object types in addition to a device object. For more information, refer to Table 3 -

Object Types Supported.

Alarms. The controller supports indication of various alarm conditions through value changes in properties of

several objects. However, it does not generate BACnet event notifications.

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BACnet Properties Configuration

To establish communication on the network, and guarantee a unique ID of devices in a BACnet system, the following

properties may have to be configured.

Table 1 - BACnet Properties Configuration

Property

Default Value

Configuration

MAC Address

000

Set to a unique address on the network between 000 and 254.

The value can be set manually via the menu.

The value can be set manually through the WriteProperty service to

Device Object.proprietary-property#1000 MSTP-Address.

The values from 128-254 represent MS/TP non-token passing slave

devices.

Device Instance

Auto

The controller automatically configures its device instance to 877,000 +

MAC address.

The value can be set manually via the menu.

The value can be set manually through the WriteProperty service to

Device Object.Object_Identifier.

The device’s Object_Identifier is a combination of the Device

Object_Type (8) and the Device_Instance (0-4194302), therefore its

decimal or hexadecimal representation tends to be incomprehensible.

For example, the Device_Instance=1000 has an equivalent

Object_Identifier of 0x020003E8 hexadecimal or 33555432 decimal.

Baud Rate

0 = Auto

The controller configures its baud rate automatically by detecting the

network upon connection.

The value can be set manually from the available values of (0) Auto, 9600,

19200, 38400, and 76800.

Max_Master

127

Configure Max_Master value to increase network efficiency when there are

less than 127 devices on the network.

The Max_Master value can be changed through the WriteProperty service

to Device Object.Max_Master.

For more information, refer to the MAC Address and Max_Master section.

Device Object.Object_Name

Name of the

device

Configure the name of the device through the WriteProperty service to

Device Object.Object_Name. For example, VAV T4 RT.

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Configuration Options

The following Configuration options enable you to configure and run the BACnet features of the controllers quickly.

Quick Setup

Configure the controller for BACnet communication without programming.

1. Ensure that no other device on the network has a MAC address of 0 (the controller's default address).

2. Connect the controller to the network and power it up.

3. The controller automatically configures the baud rate and device instance allowing BACnet Property

Configuration through the Write Property service. See Table 1 - BACnet Properties Configuration.

4. Repeat the steps for each controller.

Manual Setup

Configure the controller for BACnet communication with programming.

1. Access Operation Mode (jumper set to RUN position).

2. Press and hold both function buttons for 5 seconds to access the Quick Access menu.

3. Enter the password, 637.

4. Follow the instructions to configure the MAC Address, MAX Master, Device Instance, and Baud Rate,

manually.

5. Disconnect the power to the controller, connect the controller to the network, and connect the power

again.

MAC Address and Max_Master

The MAC address must be unique on the entire MS/TP network. However, having a unique MAC address and a high

baud rate does not guarantee efficient operation of the controller and other MS/TP units on the MS/TP network. Some

MAC address and Max_Master combinations are more efficient than others. BACnet requires token-passing units to

occasionally “poll” for other masters based on the MAC address and Max_Master.

A poor combination of MAC addresses and Max_Master can lead to a slower network due to lost time polling for

masters that are not present. Unless there are 126 other units on the MS/TP network, the default Max_Master value of

127 is not the most efficient choice for the controller. The Max_Master default value of 127 was selected to ensure

that any master, specifically a BACnet client can be found when the controller is initially started.

Examples of MAC Address and Max_Master Configurations

The following are some of the examples to indicate the optimum combination of Mac address and Max_Master

configurations to ensure a quick and efficient output.

Example 1

MAC=0. Max_Master=127

MAC=1, Max_Master=127

This configuration is slow and inefficient because every time either unit is required to find another master unit, it has to

poll 126 units until it finds the right one to pass the token.

Example 2

MAC=0. Max_Master=5

MAC=1 to MAC=4 are not used

MAC=5, Max_Master=5

This configuration is better than Example 1 but it is still not optimal. The Max_Master is set to the most efficient value

but the gap between the two MAC addresses is high. Therefore, each unit must poll four units until it finds the right

one to pass the token.

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Example 3

MAC=0, Max_Master=1

MAC=2, Max_Master=2

This is an incorrect configuration. The MAC=0 will never find MAC=2 because it will never poll for the master MAC

address=2.

Example 4

MAC=0. Max_Master=3

MAC=1, Max_Master=3

MAC=2, Max_Master=3

MAC=3, Max_Master=3

This is an efficient configuration as the units are numbered consecutively and the MAX_Master is set to the most

efficient value. As a general guideline, the most efficient setup for an MS/TP network is one in which the units are

consecutively numbered starting at MAC address 0 and having Max_Master=the maximum MAC address in the

system. If consecutive numbering is not possible, then the next most efficient setup is one in which all units have

Max_Master=the maximum MAC address in the system.

Copy Config

Copy and broadcast the entire configuration of a controller over the network to controllers of the same type using the

Copy Config feature.

1. Access Operation Mode (jumper set to RUN position).

2. Press and hold both function buttons for 5 seconds to access the Quick Access menu.

3. Enter the password, 637.

4. Scroll to Copy Config programming menu and select Yes. Follow the rest of the onscreen instructions.

Note: A Copy Config can also be executed via BACnet. See AV.165, AV.166, AV.167, and BV.90 in Table 6 -

Object Table Information: Analog Value (AV) and Table 9 - Object Table Information: Binary Value (BV) for details.

Network Reset

Reset the controller via BACnet using the Reinitialize Device service. The Reinitialize Device service can be

accessed using the following password: nep.

The Reinitialize Device service has two types of reset such as:

Warm Reset. The Warm Reset restarts the controller with actual configuration.

Cold Reset. The Cold Reset restarts the controller with Factory configuration.

Warning: The Cold Reset erases the actual configuration when setting the MSTP address. Therefore, exercise

caution while performing a Cold Reset.

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Device Object Properties

The following table lists all the BACnet properties supported for the device object. The W indicates that the property is

writable using the BACnet WriteProperty service.

Table 2 - Device Object Properties

Property

Value

Writable

Object_Identifier

Programmable where the instance part of the Object_Identifier is in the range of

0-4194302

The device instance must be unique system-wide

The default value for the device instance=877002 (Vendor_Identifier*1000)

Object_Name

VAV T4 RT, programmable up to 32 Bytes

Description

Programmable up to 32 Bytes (default: BACnet Zone controller)

Object_Type

Device

System_Status

Operational

Vendor_Identifier

Always 877

Vendor_Name

Always DEOS Controls

Model_Name

Example, VAVT4RT

Firmware_Revision

currently, 1.2

Application_Software_Version

currently, 2.07

Protocol_Version

Always 1

Protocol_Revision

Always 14

DataBase_Revision

Max_APDU_Length_Accepted

Always 480

Segmentation_Supported

(3) = No Segmentation

APDU_Timeout

6,000

Number_of_APDU_Retries

Always 3

Local_Time

00:00:00

Local_Date

01-Jan-2015 (Thu)

UtC_Offset

-300 minutes

Daylight_Savings_Status

False

Backup_Failure_Timeout

300

Configuration_Files

File-1

Last_Restore_Time

2017-04-13 (Thu), 00:00:00:00

Backup_And_Restore_State

IDLE

Backup_Preparation_Time

Restore_Completion_Time

Restore_Preparation_Time

Protocol_Services_Supported

subscribeCOV

atomicReadFile

atomicWriteFile

readProperty

readPropertyMultiple

WriteProperty

writePropertyMultiple

deviceCommunicationControl

reinitializeDevice

unconfirmedPrivateTransfer

timeSynchronization

who-Has

who-Is

utcTimeSynchronization

subscribeCOVProperty

Protocol_Object_Types_Supported

analog-input

analog-output

analog-value

binary-input

binary-output

binary-value

device

file

program

schedule

multi-state-value

Object_List

100

Device_Address_Binding

Always empty

Max_Master

Programmable in the range of 1-127 (default: 127)

Max_Info_Frames

Always 1

Active_COV_Subscription

Empty by default. COV subscription will be lost on a power cycle.

Property_List

List of properties that exist within the object.

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Property

Value

Writable

Proprietary property #1000

Programmable (default:0)

Represents the MS/TP MAC address in the range of 0 to 254

Values 128 to 254 represent MS/TP non-token passing slave devices

Proprietary property #1001

Programmable (default: Auto)

Represents the MS/TP Baud rate (unsigned type)

Values are 0 (Auto), 9600, 19200, 38400, and 76800

Reading this property always returns the actual Baud rate

Proprietary property #1002

Programmable (default: 15 minutes)

Represents the period of time that an object in/out of service will automatically

return to normal. Range = 0 to120 minutes (unsigned type)

Writing 0 means no automatic return to normal

Proprietary property #1003

0 = Mode ZNB, 1 = Mode VAV

Object Types Supported

The following table lists all the BACnet properties supported for each object type. Most of the properties are locked.

The exception is Present_Value, which represents the dynamic operating values of the device, and the Status_Flag,

Event_State,and Reliability properties, which reflect the availability of the Present_Value. Unless otherwise specified,

properties are not changeable.

Table 3 - Object Types Supported

Object

Type

Enabled

Optional Properties

Supported

Writable Properties

Notes

Note: Writable properties are different for some objects. Refer to the respective Object Table information to know the writable property for objects.

Analog

Input



Reliability

Description

Min_Present_Value

Max_Present_Value

Resolution

COV-Increment

Out_of_Service

COV-Increment

Object will automatically return to Normal after a

programmable period. Refer to Proprietary property

#1002 of Device Object in Table 2 - Device Object

Properties.

Analog

Value



Reliability

Description

COV-Increment

Priority_Array

Relinquish_Default

Present_Value

Out_of_Service

COV-Increment

Refer to Out_of_Service Property section on page

7 for more information.

Object will automatically return to Normal after a

programmable period. Refer to Proprietary

property #1002 of Device Object in Table 2 -

Device Object Properties.

Analog

Output



Description

Reliability

Min-Pres-Value

Max-Pres-Value

Resolution

COV-Increment

Present_Value

COV-Increment

Binary

Input



Reliability

Active_Text

Inactive_Text

Description

Out_of_Service

Object will automatically return to Normal after a

programmable period. Refer to Proprietary property

#1002 of Device Object in Table 2 - Device Object

Properties.

Binary

Value



Reliability

Active_Text

Inactive_Text

Description

Priority_Array

Relinquish_Default

Present_Value

Out_of_Service

Object automatically returns to Normal after a

programmable time. Refer to Proprietary property

#1002 of Device Object in Table 2 - Device Object

Properties.

Binary

Output



Description

Reliability

Inactive-text

Active-text

Present_Value

Device



Max_Master

Max_Info_Frame

Description

active-COV-subscriptions

#1000 (MSTP addr)

#1001 (Baud rate)

#1002 (Time out)

Local_Time

Local_Date

UTC_Offset

Daylight_Savings_Status

Object_Identifier

Object_Name

Max_Master

Description

Local_Time

Local_Date

UTC_Offset

Daylight_Savings_Status

Apdu_Timeout

Backup_Failure_Timeout

#1000

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Object

Type

Enabled

Optional Properties

Supported

Writable Properties

Notes

Apdu_Timeout

Backup_Failure_Timeout

Configuration_Files

Last_Restore_Time

Backup_And_Restore_State

Backup_Preparation_Time

Restore_Completion_Time

Restore_Preparation_Time

#1001

#1002

#1003

Multi-

State

Value



Description

Reliability

States_Text

Priority_Array

Relinquish_Default

Present_Value

Some objects are commandable. In such case, the

priority-array and Relinquish Default properties are

available.

Program



Description

Reliability

Program_Change

Only LOAD and RESTART are supported for

Program Change.

Use LOAD to apply the new firmware.

File



Description

Archive

File Size

Only 0 is the accepted value to be written into file

size.

Schedule



Description

Weekly Schedule

Effective Period

Weekly Schedule

Schedule Default

Priority For Writing

Out_of_Service

Out_of_Service Property

DEOS controllers offer the use of the Out_of_Service writable property. When the value of this property is set to True,

it disconnects the object from the physical input, enabling you to input other values. This is useful for special

applications or while troubleshooting. For example, you can ignore the temperature read from a sensor and input the

desired temperature value in order to perform specific tests.

For security reasons, a timeout will set the Out_of_Service property back to False after 15 minutes. This value can be

modified to between 0 and 120 minutes (For more information, see proprietary property #1002 in Table 2 - Device

Object Properties).

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Object Table Information

The VAV T4 RT system uses the following BACnet object tables, categorized on the basis of their ID. The type is the BACnet Object type, the instance is the BACnet Object.

Together, the type and instance form the BACnet Object_Identifier for an object according to the following C-language algorithm:

object_identifier=(unsigned long)((unsigned long)type<<22)+instance

Analog Input (AI)

Table 4 - Object Table Information: Analog Input (AI)

Name

List

Description

Notes

AI.2

AI2_AuxIn

Integrator

Auxiliary input. Temperature or percentage 0 to 100% (0 to 100% = 0 to 10

Vdc) or ON/OFF set by MSV.5 Cfg_AI2_Type.

Out_of_Service

COV Increment (0.5)

Temp = -40°F to 212°F or -40°C to 100°C

Resolution 0.2°F/0.1°C

% = 0 Volts to 100 Volts, Resolution 0.1 Volt

On/Off = 0, 1

AI.3

RoomTemperature

Integrator

Room temperature read by the internal sensor.

Out_of_Service

COV Increment (0.1)

32ºF to 122ºF or 0ºC to 50ºC

Resolution 0.02ºF/0.01ºC

Analog Output (AO)

Table 5 - Object Table Information: Analog Output (AO)

Name

List

Description

Notes

AO.1

AnalogOutput1

Integrator

Status value that represents the modulation percentage of analog output 1

based on demand.

Present Value

COV Increment (0.5)

0% to 100%, Resolution 0.1%

AO.2

AnalogOutput2

Integrator

Status value that represents the modulation percentage of analog output 2

based on demand.

Out_of_Service

COV Increment (0.5)

0% to 100%, Resolution 0.1%

Analog Value (AV)

Table 6 - Object Table Information: Analog Value (AV)

Name

List

Description

Notes

AV.3

Local_AI1_SAT_CO

Integrator

Local suply air temperature on analog input 3.

Out_of_Service

COV Increment (0.5)

-40°F to 212°F or -40°C to 100°C

Resolution 0.02ºF/0.01°C

AV.6

OAT

Integrator

Outdoor air temperature from RTC 1010.

COV Increment (0.5)

-40°F to 212°F or -40°C to 100°C

Resolution 0.02ºF/0.01°C

AV.10

Cfg_CalibRoomTemperature

Integrator

Configuration value that represents the calibration of room temperature. Can be

calibrated from the minimum to the maximum temperature.

Present Value

COV Increment

-40°F to 212°F or -40°C to 100°C

Resolution 0.02ºF/0.01°C

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Name

List

Description

Notes

AV.15

OccupiedTemperatureSetpoint

Integrator

Configuration value used to set the actual user setpoint of the zone in

occupied/day mode.

Present Value

COV Increment (0.5)

AV.16 to AV.17, Resolution 0.02ºF/0.01°C

AV.16

Cfg_MinSetpoint

Integrator

Configuration value used to set the user minimum permitted setpoint of the

zone in occupied/day mode.

Present Value

COV Increment (0.5)

-40°F to 212°F or -40°C to 100°C (-40°F/-40°C to

AV.17), Resolution 0.02ºF/0.01°C

AV.17

Cfg_MaxSetpoint

Integrator

Configuration value used to set the user maximum permitted setpoint of the

zone in occupied/day mode.

Present Value

COV Increment (0.5)

-40°F to 212°F or -40°C to 100°C (AV.16 to

212°F/100°C), Resolution 0.02ºF/0.01°C

AV.18

UnoccupiedCoolSetpoint

Integrator

Configuration value of the cooling setpoint during no occupancy mode. The

cooling setpoint is restricted by the heating setpoint.

Present Value

COV Increment

50°F to 104°F or 10°C to 40°C (50°F/10°C to

AV.12), Resolution 0.02ºF/0.01°C

AV.19

UnoccupiedHeatSetpoint

Integrator

Configuration value of the heating setpoint during no occupancy mode for

return air temperature. The heating setpoint is restricted by the cooling setpoint.

Com lost RAT control setpoints.

Present Value

COV Increment

50°F to 104°F or 10°C to 40°C (AV.11 to

104°F/40°C), Resolution 0.02ºF/0.01°C

AV.20

HeatingDemand

Integrator

Status value that represents the heating demand in percentage for the Heating

Ramp. The heating demand value is based on zone temperature, zone setpoint

and values set for the actual ramp (AV.21 and AV.22).

Read only

COV Increment (5)

0 to 100%, Resolution 0.5%

AV.21

Cfg_HeatingPropBand

Advanced

Configuration value that represents the range through which the controller will

modulate the heating output from 0 to 100%.

Present Value

COV Increment (0.5)

1ºF to 10ºF or 0.5ºC to 5ºC, Resolution 1ºF/0.5ºC

AV.22

Cfg_HeatingDeadBand

Advanced

Configuration value that represents the range where the controller will not take

action when below the zone setpoint.

Present Value

COV Increment (0.1)

0°F to 10°F or 0°C to 5°C, Resolution 0.2ºF/0.1ºC

AV.23

DuctReheatDemand

Integrator

Status value that represents the reheat demand.

Read only

COV Increment (0.1)

0 to 100%, Resolution 0.1%

AV.24

Cfg_DuctReheatPropBand

Advanced

Configuration value that represents the range through which the controller will

modulate the reheat output from 0 to 100%.

Present Value

COV Increment (0.5)

1ºF to 10ºF or 0.5ºC to 5ºC, Resolution 1ºF/0.5ºC

AV.25

Cfg_DuctReheatDeadBand

Advanced

Configuration value that represents the range at which the controller will not

take action when below the zone setpoint.

Present Value

COV Increment (0.3)

0°F to 10°F or 0°C to 5ºC, Resolution 0.2ºF/0.1ºC

AV.26

PerimeterReheatDemand

Integrator

Status value that represents the perimeter (baseboard) reheat demand.

Read only

COV Increment (5)

0 to 100%, Resolution 0.1%

AV.27

Cfg_PerimeterReheatPropBand

Advanced

Configuration value that represents the range through which the controller will

modulate the perimeter (baseboard) reheat from 0 to 100%.

Present Value

COV Increment (0.5)

1ºF to 10ºF or 0.5ºC to 5ºC, Resolution 1ºF/0.5ºC

AV.28

Cfg_PerimeterReheatDeadBand

Advanced

Configuration value that represents the range at which the controller will not

take action when below the zone setpoint.

Present Value

COV Increment (0.1)

0°F to 10°F or 0°C to 5ºC, Resolution 0.2ºF/0.1ºC

AV.30

Cfg_IntegralTimeHeating

Advanced

Configuration value that represents the reciprocal of the integral time in

seconds (1/I or repeats per second). To obtain a slower reaction time, the value

of the integral must be small. To obtain a quicker reaction, the integral must be

bigger.

Present Value

COV Increment (5)

0 to 250 seconds, Resolution 5 seconds

AV.36

Cfg_HeatingDemandBalance

Integrator

Configuration value that represents the heating demand balance for a zone.

Present Value

COV Increment (0.1)

0 to 100%, Resolution 0.1%

AV.37

HeatingWeightedDemand

Integrator

Heating weighted demand for a zone (value sent to RTC 1010).

COV Increment (0.1)

0 to 100%, Resolution 0.1%

AV.38

Cfg_CoolingDemandBalance

Integrator

Configuration value that represents the cooling demand balance for a zone.

Present Value

COV Increment (0.1)

0 to 100%, Resolution 0.1%

AV.39

CoolingWeightedDemand

Integrator

Cooling weighted demand for a zone (value sent to RTC 1010).

COV Increment (0.1)

0 to 100%, Resolution 0.1%

AV.40

CoolingDemand

Integrator

Status value that represents the cooling demand for the Cooling Ramp. The

cooling demand value is based on zone temperature, zone setpoint and values

Read only

COV Increment (5)

0 to 100%, Resolution 0.5%

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