Schneider Electric TAC Xenta 102 Users Manual

Zone controller TA C Xenta 102

Handbook

TAC impr oves indoor c limate and reduces operating costs.

0-004-7516-1 (GB), 1999-08-18

Air flow

Heating

Changeover via

network variable

Cooling

Cooling demand

TAC Xenta 102 Handbook Foreword

Foreword

This is the technical handbook for the TAC Xenta 102 controller, a zone controller for VAV applications in offices and other larger buildings.

In this second edition of the handbook, sections that were earlier complicated to the user, have been made clearer, and most of the content has been reorganized. The trouble-shooting section has been made into its own chapter, and there are now appendices in the end of the handbook; one containing setpoint calculating examples, and one containing a commissioning protocol which can be used together with chapter 3 when commissioning.

The programs in TAC Xenta 102 now have new versions. For both the system program and the application program in the controller, the versions are 1.10. If there is a service replacement in the system, all variable bindings—if the controller is run on a network—must be remade when an older or newer version of the controller is fitted. Th is is because the controller has got a new “Standard Program ID”. There are also three new network variables.

TAC AB, 1999-08-18

0-004-7516-1 (GB), i (ii)

TAC Xenta 102 Handbook Foreword

This document contains information which is the property of TAC and is therefore only available for those using and maintaining TAC’s equipment. Disclosure, reproduction or use of either the document or the information within for any other purpose are strictly prohibited.

TAC reservs the right to make necessary changes of and additions to the material.

Echelon, Lon, LonWorks, LonTalk, Neuron, 3150, LonMark and the LonMark logo are registered trademarks for Echelon Corporation, USA. TAC Xenta® is a registered trademark for TAC AB in Sweden and other countries. All other trademarks are the property of their respective owners.

Revisions list

Part number Comment Editor Date

0-004-7516-0 First edition. KRRO 1997-09-11 0-004-7516-1 Second edition. System and application program in a new SUWA 1999-08-18

version 1.10.

ii (ii), 0-004-7516-1 (GB)

TAC AB, 1999-08-18

TAC Xenta 102 Handbook Contents

Zone controller TAC Xenta 102

Handbook

Reservations for changes.

Contents

1 Introduction .................................................................................................................. 1:1

1.1 The content of the handbook ............................................................................................................... 1:1

1.2 Documentation .................................................................................................................................... 1:2

1.3 Terminology ........................................................................................................................................ 1:3

2 The zone controller T A C Xenta 102 ............................................................................ 2:1

2.1 General ................................................................................................................................................ 2:1

2.2 Wall modules ....................................................................................................................................... 2:3

2.3 Applications ......................................................................................................................................... 2:4

2.3.1 General ............................................................................................................................................... 2:4

2.3.2 Air flow control only (TAC Xenta 102-B) ................................................................................... ..... 2 : 4

2.3.3 Air flow control with modulating valve reheat (TAC Xenta 102-VF) ................................................ 2:5

2.3.4 Air flow control with modulating valve water reheat and fan (TAC Xenta 102-VF) .................... 2: 5

2.3.5 Air flow control with one stage electric reheat (TAC Xenta 102-EF) ............................................. 2: 6

2.3.6 Air flow control with one stage electric reheat and fan (TAC Xenta 102-EF) ............................... 2: 6

2.3.7 Air flow control with thermo-actuator for radiators (TAC Xenta 102-EF) ................................... 2:7

3 Installation .................................................................................................................... 3:1

3.1 Mechanical installation ....................................................................................................................... 3:1

3.1.1 Fitting.................................................................................................................................................. 3:1

3.2 Electrical installation.......................................................................................................................... 3:3

3.2.1 General ............................................................................................................................................... 3:3

3.2.2 Wiring of TAC Xenta 102-B............................................................................................................. 3 :5

3.2.3 Wiring of TAC Xenta 102-EF ............................................................................................... ........... 3 :6

3.2.4 Wiring of TAC Xenta 102-VF ............................................................................................... ........... 3 : 7

3.3 Commissioning ................................................................................................................................... 3:8

3.3.1 General ............................................................................................................................................... 3 :8

3.3.2 Node status.......................................................................................................................................... 3:8

3.3.3 Configuration parameters (nci’s)...................................................................................................... 3: 9

3.3.4 Network installation ......................................................................................................................... 3:10

3.3.5 Network variable binding ................................................................................................................ 3:10

3.3.6 Function test ..................................................................................................................................... 3:10

4 Configuration parameters ............................................................................................ 4:1

4.1 Basic parameters ................................................................................................................................ 4:2

4.2 Other configuration parameters ......................................................................................................... 4:3

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TAC Xenta 102 Handbook Contents

5 Functional description................................................................................................. 5:1

5.1 General ................................................................................................................................................ 5:1

5.2 The controller’s basic functions ......................................................................................................... 5:2

5.2.1 Operation modes ................................................................................................................................ 5:2

5.2.2 Operation mode, manual mode and emergency mode .................................................................... 5:4

5.2.3 Measuring zone temperature ............................................................................................................ 5: 5

5.2.4 Setpoint calculation ........................................................................................................................... 5:6

5.2.6 Control sequence with TAC Xenta 102-B ......................................................................................... 5:8

5.2.5 Control sequence with TAC Xenta 102-EF and 102-VF .................................................................. 5: 8

5.3 More about functions......................................................................................................................... 5:10

5.3.1 Air flow control ................................................................................................................................ 5:10

5.3.2 Heating and fan control ................................................................................................................... 5:11

5.3.3 Air quality control ........................................................................................................................... 5:12

5.3.4 Window contact ................................................................................................................................ 5:13

5.3.5 Occupancy sensor ............................................................................................................................ 5 :13

5.3.6 Minimum value for heating valve (TAC Xenta 102-VF only) ...................................................... 5:14

5.3.7 Alarm ................................................................................................................................................ 5:15

5.3.8 Master/slave operation .................................................................................................................... 5:16

6 Trouble-shooting ........................................................................................................... 6:1

6. 1 General ................................................................................................................................................ 6:1

6.2 Inputs and outputs (nvi/nvo’s).............................................................................................................. 6:2

6.3 Problems and solutions ....................................................................................................................... 6:3

7 T echnical data............................................................................................................... 7:1

7.1 T echnical data...................................................................................................................................... 7:1

7.2 Dimensions.......................................................................................................................................... 7:3

7.2.1 With semi-protection ......................................................................................................................... 7 :3

7.2.2 Without semi-protection .................................................................................................................... 7 :3

8 Communication ............................................................................................................. 8:1

8. 1 General ................................................................................................................................................ 8:1

8.2 Default settings and power on ............................................................................................................. 8:1

8.3 Monitoring network variables, Heartbeat ........................................................................................... 8:2

8.4 Not accepted values.............................................................................................................................. 8:3

8.5 The node object .................................................................................................................................... 8:3

8.5.1 The node object’s inputs (nvi)............................................................................................................ 8 :3

8.5.2 The node object’s outputs (nvo)......................................................................................................... 8 :4

8.5.3 The node object’s configuration parameters (nci) ........................................................................... 8:4

8.6 The controller object ........................................................................................................................... 8:4

8.6.1 The controller object’s inputs (nvi) ...................................................................................... ............. 8 :6

8.6.2 The controller object’s outputs (nvo) ................................................................................................ 8: 7

8.6.3 The controller object’s configuration parameters (nci) .................................................................. 8 :8

Appendix A: Setpoint calculation

Appendix B: Commissioning protocol Index Reply form

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TAC Xenta 102 Handbook About this handbook

1 Introduction

1.1 The content of the handbook

• Chapter 1 Introduction,

gives an overview over the structure of this handbook, additional information about the product, and has a short terminology section.

• Chapter 2 The zone controller TAC Xenta 102,

briefly describes the wall module, the controller’s functions and control examples of the three different models of TAC Xenta 102.

• Chapter 3 Installation,

contains instructions on mechanical and electrical installation of the controller, and instructions on commissioning and network installation.

• Chapter 4 Configuration parameters,

describes the setting of the zone controller’s configuration parameters.

• Chapter 5 Functional description,

gives detailed information about the zone controller’s basic functions, operating modes, and other functions.

• Chapter 6 Trouble-shooting during operation and

commissioning,

contains trouble-shooting measures you can use to find and remedy possible faults in the system.

• Chapter 7 Technical data,

lists all technical data and dimensions for TAC Xenta 102.

• Chapter 8 Communication,

describes the zone controller’s communication with other units via the network by means of network variables.

• Appendix A, Setpoint calculation

contains calculating examples for the setpoint calculation in chapter 5.

• Appendix B

contains a commissioning protocol, which can be used together with chapter 3 during installation and commissioning.

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TAC Xenta 102 Handbook About this handbook

• Index and Reply form,

are in the end of the handbook. Use the index to make your search for information easier, and the reply form to let us know whether there is something wrong or unclear in this handbook.

1.2 Documentation

Enclosed documentation

TAC Xenta 102 is delivered with an installation instruction for each of the controllers below:

• TAC Xenta 102-B, Installation instruction, part number 0FL-3857

• TAC Xenta 102-EF, Installation instruction, part number 0FL-3859

• TAC Xenta 102-VF, Installation instruction, part number 0FL-3861

Other documentation

There is additional information about TAC Xenta 102 in the following documents:

• Data sheet for TAC Xenta 102-B, part number 0-003-1611

• Data sheet f or TAC Xenta 102-EF, part number 0-003-1617

• Data sheet f or TAC Xenta 102-VF, part number 0-003-1623

• Data sheet for ZS 101–ZS 105, part number 0-003-1661. Here the wall modules are described.

• TAC Xenta Network Guide, part number 0-004-7460. Here you can find additional information on network installation.

• TAC Xenta OP Handbook, part number 0-004-7506. Here you find information on how to use TAC Xenta OP together with TAC Xenta 102 and the wall modules.

• TAC Xenta, Zone System Guidelines part number 0-004-7637. Here you find information on how a zone system is built with TAC Xenta components.

• TAC Xenta 102 Handbook, part number 0-004-7516-0. Here you find information on the earlier version of the zone controller.

All the above mentioned documents can be found on the internet: www.tac.se or they can be ordered from the nearest TAC service point.

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TAC Xenta 102 Handbook About this handbook

1.3 Terminology

In this handbook there are some abbreviations and terms which are specific for the zone controller’s applications and network communication. Therefore, the most common terms have been gathered, together with a short explanation, in the list below.

neuron .................. communication processor with built-in

protocol

node ..................... communication unit on the network

SNVT ................... Standard Network Variable Type

nvixxx .................. variable which gets its value from another

unit on the network

nvoxxx ................. variable which value is sent out to another

unit on the network

ncixxx .................. configuration parameter; variable which gets

its value from another unit on the network and which keeps it during a power failure

service pin ........... function which can be used during installation

on the network

wink ..................... confirmation that the connection to a controller

via the network is working (a light emitting diode is lit for appr. 15 seconds)

LNS ...................... LonWork Network Services. System tool for

installation, configuration and maintenance of LonWorks network

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TAC Xenta 102 Handbook The zone controller TAC Xenta 102

2 The zone controller TAC Xenta 102

2.1 General

The zone controller TAC Xenta 102 is intended for “Variable Air Volume” (VAV) applications in offices and other large buildings. A VAV controller usually controls the temperature in a given zone by controlling the volume sub-tempered air which is supplied to the zone.

The controller’ s basic functions

All controller models have a number of built-in functions which handle the normal control situation. There are four operating modes to choose from (comfort, economy, bypass, and off) and five modes to force the controller (only heating allowed, only cooling allowed, night cooling, auto, and off).

Measuring the zone temperature is made by means of a permanent thermistor sensor or a temperature node connected to the network, and setpoint calculation is made according to special methods.

There is a detailed functional description of all the basic functions in chapter 5.2.

More about functions

Apart from the controller’s basic functions, there are additional possibilities to control the climate in the zone. In section 5.3, these are described in detail, and also which external functions that may be connected, e.g. window contact sensor and occupancy sensor.

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TAC Xenta 102 Handbook The zone controller TAC Xenta 102

Communication possibilities

The controller can work either as a free-standing unit, without being connected to a network during operation, or be a part of a larger system with several other units such as TAC Xenta 300/400 and other zone controllers in the TAC Xenta family (figure 2.1). A detailed description of how units work together in a larger zone system, is found in “Guide lines for zone applications”, part number 0-004-7637.

TAC Vista is an excellent tool for reading variables and as a configuration tool during commissioning and/or operation. When TAC Vista is not a part of the system, reading and configuration of variables can be made from the operating panel TAC Xenta OP, version 3.11 or later.

4th

floor

3rd

floor

Office 3:1 Office 3:2

Office 3:3 Office 3:4

TAC

Xenta

300

Office 3:5

Analog

Digital

I/O

Office 3:6 Office 3:7 Office 3:8 Office 3:9

TAC

Xenta

400

2nd

floor

1st

floor

Router

Room

Slave

1:1

101-1VF 101-2VF101-1VF101-1VF101-1VF101-1VF101-1VF101-1VF101-1VF

Master

Room 1:2

Slave

Room 2:2

Slave

102-B 102-B102-B

Room 1:3

Slave

TAC Vista

Room 2:3

Room

1:4

Slave

Office 2:1

Room 1:5

Master

102-EF102-EF102-EF102-EF102-EF

Office 2:2

Office 1:1

Office 2:3

Office 1:2

Office 2:4 Office 2:5

Office 1:4

Office 1:3

103-A103-A103-A103-A

Office 2:6Room 2:1

101-2VF101-2VF101-2VF101-2VF101-2VF101-2VF

Ground

floor

TAC

Xenta

400

Figure 2.1 Zone controller in a larger system together with TA C Vista

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TAC Xenta 102 Handbook The zone controller TAC Xenta 102

The controller is LONMARK® approved and communicates on a LONTALK® TP/FT-10 network via a twisted-pair, unpolarized cable.

2.2 Wall modules

Locking screw

COMFORT

Bypass key

ECONOMY OFF

OP connection

Figure 2.2 Wall module in the ZS100 series

Position indicator

Setpoint knob

In the controlled zone, there is usually a wall module from the ZS 100 series, which measures the temperature. The wall modules ZS 101–ZS 105 may very well be used together with all controller models. On the wall module (figure 2.2) there are among other things a setpoint knob and a bypass key with setting possibilities.

The setpoint knob is used to adjust the zone temperature setpoint with a maximum of ± 5 °C.

The bypass key is used to change the operating mode, and by pressing the key, an internal timer in the controller, which runs for two hours, is started. Read more about different operating modes and ways to force the controller in sections 5.2.1–5.2.2.

On all ZS 100 wall modules, the current operating mode is indicated by the position indicator (red light emitting diode) as follows:

· Steady light: Comfort or bypass mode

· Slow flashing: Economy mode

· Fast flashing for appr. 15 s: Answer to “wink” command.

Confirmation that the OP is connected to the correct controller

· Off: Other operating modes

There is additional information on the wall modules and how the temperatures can be adjusted locally in the zone by means of the keys in “Data sheet for ZS 101–ZS 105”, part number 0-003-

1661.

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TAC Xenta 102 Handbook The zone controller TAC Xenta 102

2.3 Applications

2.3.1 General

All models have this in common:

• they are intended for use together with a Belimo® VAV-Compact

air flow controller. TAC Xenta 102 sends air flow setpoints to the VAV-Compact, and reads measured air flow from the air flow controller.

• they have air quality control as an option, which means that the

controller can control the air flow to keep down the carbon dioxide concentration in the zone. However, the function needs a carbon dioxide sensor to be connected to the controller, electronically or via the network.

• a window contact to stop the heating and cooling functions,

should a window be opened, can be connected. An occupancy sensor can detect the presence of a person in the controlled zone and change the controller from economy to comfort mode.

The window contact sensor, occupancy sensor, and air quality control are described in detail in section 5.3.2–5.3.4.

2.3.2 Air flow control only (TAC Xenta 102-B)

The controller controls the zone temperature by means of the air damper via VAV-Compact. The air flow is minimum and maximum limited. Usually the controller only uses one cooling sequence (sub-tempered air in the duct), but it can be changed to heating (hot air in the duct) given a central command.

Window contact

Damper and air flow controller

Wall

sensor

module

Carbon dioxide

Occupancy

sensor

Figure 2.3 Control application for TA C Xenta 102-B

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TAC Xenta 102 Handbook The zone controller TAC Xenta 102

2.3.3 Air flow control with modulating valve water reheat (TAC Xenta 102-VF)

The controller controls the zone temperature by sequence controlling the air flow controller (VAV-Compact) and the heating coil. The air flow is minimum and maximum limited. The heating sequence controls the valve and minimum limits the air flow.

Wall module

Carbon dioxide

sensor

Occupancy

sensor

Window contact

Damper and air flow controller

Heating water coil

Valve and actuator

Figure 2.4 Control application for TA C Xenta 102-VF

2.3.4 Air flow control with modulating valve water reheat and fan (TAC Xenta 102-VF)

The controller controls the zone temperature by sequence controlling the air flow controller (VAV-Compact) and the heating coil. The airflow is minimum and maximum limited. The heating combines the valve control with the fan to increase the air circulation through the heating coil.

Window contact

Damper and air flow controller

Fan

Heating water coil

Wall module

Carbon dioxide

sensor

Occupancy

sensor

Valve and actuator

Figure 2.5 Control application for T A C Xenta 102-VF

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TAC Xenta 102 Handbook The zone controller TAC Xenta 102

2.3.5 Air flow control with one stage electric reheat (TAC Xenta 102-EF)

The controller maintains the zone temperature by sequence controlling the air flow controller (VAV-Compact) and the electric heating coil. The air flow is minimum and maximum limited. When heating, the controller controls the electric heating coil via a relay in combination with setting the air flow to its minimum value.

Window contact

Damper and air flow controller

Electric heating coil

Wall module

Carbon dioxide

sensor

Occupancy

sensor

Figure 2.6 Control application for T A C Xenta 102-EF

2.3.6 Air flow control with one stage electric reheat and fan (TAC Xenta 102-EF)

The controller controls the zone temperature by sequence controlling the air flow controller (VAV-Compact) and the electric heating coil. The air flow is minimum and maximum limited. When heating, the controller controls the electric heating coil by means of a relay in combination with the fan running to increase the air circulation through the heating coil. In this application (electric reheat + fan), the minimum limitation may have separate settings for cooling and heating.

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TAC Xenta 102 Handbook The zone controller TAC Xenta 102

Wall

Fan

module

Carbon dioxide

sensor

Occupany sensor

Window contact

Damper and air flow controller

El. heating coil

Figure 2.7 Control application for T A C Xenta 102-EF

2.3.7 Air flow control with thermo-actuator for radiators (TAC Xenta 102-EF)

The controller controls the zone temperature by sequence controlling the air flow controller (VAV-Compact) and the themo-actuators for radiators. The air flow is minimum and maximum limited.

Carbon dioxide

Window contact

Damper and air flow controller

Valve

Radiators

Figure 2.8 Control application for T A C Xenta 102-EF

Wall module

sensor

Occupancy

sensor

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TAC Xenta 102 Handbook Installation

3 Installation

3.1 Mechanical installation

3.1.1 Fitting

TAC Xenta 102 can either be snapped onto a DIN rail (figure

3.1) or fastened with two screws to a level surface (figure 3.2). On the controllers which controls equipment with 230 V supply, a semi-protection which covers the relay terminals, should be fitted (figure 3.3). A semi-protection is delivered together with these controllers.

T o fasten the contr oller onto a DIN rail:

1. Place the controller on the top of the rail as is shown by arrow 1.

2. Turn the controller downwards until it snaps onto the rail as is indicated by arrow 2.

3. To remove, place a screwdriver in the lock on the bottom of the controller and pull down. Then it is possible to lift the controller diagonally upwards and off the rail.

Figure 3.1 TA C Xenta 102 fastened on a DIN ra il

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TAC Xenta 102 Handbook Installation

Fastening the controller on a level surface:

Use the two sockets provided for fastening the controller; the maximum screw size is M4 or ST 3,5. The head of the screw should not exceed 7,5 mm in diameter.

Figure 3.2 TA C Xenta 102 f astened on a le v el surface

T o fit the semi-protection:

When the cables are secured, the protection is fitted by means of the enclosed screw.

Figure 3.3 Fitting the semi-protection

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TAC Xenta 102 Handbook Installation

3.2 Electrical installation

3.2.1 General

Warning! All 230 V supply cables must be

1. Each controller or group of controllers must be fitted with max. 6 A fuses.

2. Secure the cables to the controller by means of clamps or similar, to limit their mobility.

3. Wire straps or shrinking tubing must prevent loose 230 V cables from getting in contact with ELV cables—supply or signal cables—and vice versa.

4. It must be simple to break the power supply for the controller or for the complete installation.

5. When several Xenta controllers are supplied from a common transformer, it is important that all G’s are connected with each other and that all G0’s are connected with each other. They must not be interchanged. An important exception connected with the other G0’s. Instead it should be connected to the terminal OP on the controller. At the transformer, G0 should be connected to protective earth. This is to get an grounding point for interference diversion.

installed by authorised electricians.

: G0 on the wall module should not be

6. Connect the two M terminals to the wall module to get the specified measuring accuracy for the room temperature.

Safety standard

Transformers supplying the controller must comply to the safety standard EN 60 742 or any other relevant safety standard for ELV, 24 V AC. When equipment with a power supply of its own is connected, e.g. an occupancy sensor, this power supply must also comply with this norm.

Cable lengths

For information on communication cable lengths, see TAC Xenta Network Guide, part number 0-004-7460. For all other cables, maximum length is 30 m and min. area is 0,7 mm

Wall modules ZS 101–ZS 104

It is mainly the wall modules ZS 101–ZS 104 which are intended for use together with TAC Xenta 102. The wall module ZS 105 can also be used, but then the fan switch on this unit is not used. The wiring diagrams on the following pages show how wiring with ZS 104 should be done, as this is the model that has all connections.

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TAC Xenta 102 Handbook Installation

Connection terminals

The designation of the connection terminals can be seen in two places on the controller: on the edge of the printed circuit board, and on the label on the front of the controller.

Termin Design. Function Type no.

1 C1 TP/FT-10 communication channel 2 C2 TP/FT-10 communication channel -

3 4 M Measurement neutral -

6 7 M Measurement neutral -

8 Z1 Air flow from VAV-Compact Analogue input 9 D1 LED on wall module Digital output 10 M Measurement neutral 11 X1 Bypass key on wall module Digital input

12 R 1 Setpoint adjustment on wall 10 k

X3 Window contact Digital input

(Closed contact=closed window)

X2 Occupancy sensor Digital input Z2 Carbon dioxide sensor Analogue input

Ω linear

module potentiometer

13 M Measurement neutral 14 B1 Room temperature sensor Thermistor input 15 G 24 V AC (G) Input 16 G0 24 V AC (G0) Input

OP 24 V AC supply for TAC Xenta OP -

18 G 24 V AC supply for TAC Xenta OP 19 V 1 Fan on/off (102-EF and 102-VF)

20 G 24 V AC (G) supply for V1 and V2 Output 21 G0 24 V AC (G0) Output 22 Y 2 Control signal 0–10 V for heating Analogue output

valve (only 102-VF) 23 M Measurement neutral 24 Y1 Control signal, air flow controller Analogue output

25 — Not in use 26 — Not in use 27 K 1 On/off, electric heating coil or

thermo-actuator (only 102-EF),

24 V or 230 V AC Relay 28 K C1 Supply for K1 -

See chapter 4 Configuration parameters

Connected alone to G0 on the wall module. Must not be connected to G0 on

the controller.

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TAC Xenta 102 Handbook Installation

3.2.2 Wiring of TAC Xenta 102-B

Note! Read section 3.2.1 “General” before you connect the cables according to the wiring diagram in figure 3.4.

LONT

ALK

TP/FT-10

15 16 17 18 19 20 21 22 23 24 25 26 27 28

Junction box

Wall module

Window

contact

Occupancy

GW1 GQ1GX1

1234567891011121314

C2 X3 M M MMZ1 X1R1 B1

sensor

+–

Carbon dioxide

sensor e.g. GKD 2001

V... 24 V AC/DC

10)(9

ZS 104

D1C1

Xenta 102-B

OP V1 Y1

C2 G0

Belimo VAV-Compact

Air flow controller with damper

24 V AC (G) 24 V AC (G0)

Figure 3.4 Wiring of TA CXenta 102-B

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