Vector TRA-F22 A Series User manual

TRA-F22x-A
Doc: 70-00-0958A V1.0, 20221102 © Vector Controls GmbH, Switzerland Page 1-34
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VECTOR
TRA-F22x-A
Fan coil controller with Modbus RTU
Document sections
Chapter
Page
General Description
1
2
Technical Specifications
2
4
Operation
3
6
Setting up the controller
4
12
Configuration (parameter options)
5
13
Runtime Data
6
31
Additional Information
7
33

TRA-F22x-A
GENERAL DESCRIPTION
Doc: 70-00-0958A V1.0, 20221102 © Vector Controls GmbH, Switzerland Page 2-34
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VECTOR
1General Description
The TRA-F22x-A is a communicating electronic fan coil controller that controls the room temperature.
It supports motorized valves in 2-pipe and 4-pipe fan coil units (heating or cooling). There is an analog or digital
fan available. The digital fan supports 1- or 3 fan speeds, whereas the analog fan runs continuously variable.
Additional inputs can be used for external temperature sensor, room occupancy (motion) detection and more.
The controller offers the operating modes Comfort, Economy and Protection.
The TRA-F221-A includes a Modbus RTU interface and can easily be integrated into a building automation system.
Typical application includes:
•Fan coil systems
- 2-pipe fan coil (cooling or heating on/off valve)
- 2-pipe fan coil (cooling or heating modulating valve)
- 2-pipe fan coil with 3-position valve (cooling or heating valve)
- 2-pipe fan coil and electric heater
- 4-pipe fan coil (cooling and heating on/off valve)
- 4-pipe fan coil (cooling and heating modulating valve)
•Floor heating systems (on/off, modulating or 3-position valve)
•Chilled/Heated ceilings or chilled beams systems (on/off, modulating or 3-position valve)
1.1 Features
•LCD display with backlight
•Room temperature control via built-in temperature sensor
•2 configurable inputs temperature or digital
•2 analog outputs for modulating valve control or analog fan
•3 digital outputs for 1- or 3-speed fan control or digital valves (on/off or 3-position valve)
•Comfort, Economy and Protection operating mode
•Display of current room temperature or temperature set point in °C or °F
•Display of outdoor temperature received from Modbus master
•Manual or automatic heating / cooling changeover
•Select operating mode via operating mode button on the controller
•Minimum and maximum limitation of room temperature set point
•Floor heating temperature limitation
•Key lock function
•RTU Modbus slave interface (TRA-F221 only)
•Reload default settings for commissioning and control parameters
•110…230 VAC operating voltage
•Flush mount on all 75x75x35mm wall mounting box or larger boxes
•Selection of application via parameter
•No data loos on power fail
1.2 Safety
DANGER! Safety advice
This device is for use as an operating controller. It is not a safety device. Where a device failure could endanger
human life and property, it is the responsibility of the client, installer and system designer to add additional safety
devices to prevent such a device failure. Ignoring specifications and local regulations may cause equipment
damage and endangers life and property. Tampering with the device and misapplication will void the warranty.

TRA-F22x-A
GENERAL DESCRIPTION
Doc: 70-00-0958A V1.0, 20221102 © Vector Controls GmbH, Switzerland Page 3-34
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1.3 Types and Ordering
Product Name
Product No.
Description / Type
Size / Length
Weight
Controller
TRA-F220-A
40-10-0274
Fan coil controller standalone
88 x 88 x 41 mm (3.5 x 3.5 x 1.6 inch)
168g
(5.92oz)
TRA-F221-A
40-10-0256
Fan coil controller with Modbus
88 x 88 x 41 mm (3.5 x 3.5 x 1.6 inch)
168g
(5.92oz)
Installation box (optional)
AMB-001
40-51-0009
Flush mounting installation box
80 x 80 x 40 mm (3.2 x 3.2 x 1.6 inch)
40g
(1.41oz)
AMB-005
40-51-0010
Surface mounting installation box
85 x 85 x 37 mm (3.4 x 3.4 x 1.5 inch)
46g
(1.62oz)
Passive temperature sensor with flying lead (NTC 10kΩ at 25 ºC (77 °F))
S-Tn10-2
40-200001
-
2 m (6 ft.) PVC cable
-
S-Tn10-6
40-200142
-
6 m (19 ft.) PVC cable
-
Passive temperature sensor for duct mounting (NTC 10kΩ at 25 ºC (77 °F))
SD-Tn10-12-2
40-200002
12 cm (4.7 inch) probe
2 m (6 ft.) PVC cable
-
SD-Tn10-20-2
40-200003
20 cm (7.8 inch) probe
2 m (6 ft.) PVC cable
-
SDB-Tn10-12-1
40-200124
12 cm (4.7 inch) probe
-
-
SDB-Tn10-20-1
40-200133
20 cm (7.8 inch) probe
-
-
Passive temperature sensor for contact mounting on pipes (NTC 10kΩ at 25 ºC (77 °F))
SC-Tn10-2
40-200095
-
2 m (6 ft.) PVC cable
-
SC-Tn10-6
40-200159
-
6 m (19 ft.) PVC cable
-
Passive temperature sensor for indoor mounting (NTC 10kΩ at 25 ºC (77 °F))
SRA-Tn10
40-200005
Indoor temperature sensor
88 x 88 x 21 mm
(3.5 x 3.5 x 0.8 inch)
-
Passive temperature sensor for outdoor mounting (NTC 10kΩ at 25 ºC (77 °F))
SOD-Tn10-1
40-200108
Outdoor temperature sensor
64 x 64 x 36 mm
(2.5 x 2.5 x 1.4 inch)
-
Additional sensors and accessories can be found on the Vector Controls home page www.vectorcontrols.com.

TRA-F22x-A
TECHNICAL SPECIFICATIONS
Doc: 70-00-0958A V1.0, 20221102 © Vector Controls GmbH, Switzerland Page 4-34
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VECTOR
2Technical Specifications
Power supply
Power requirements
110…250 VAC, 50/60 Hz
Power consumption
Max. 5 VA
Electrical connection
Screw terminals
Wire 0.15…2.05 mm2 (AWG 26…14)
Built-in sensor
Temperature range
Accuracy 0…50°C
0…50°C (32…122°F)
0.5°C (1°F)
Signal inputs
Digital and temperature input
Temperature range
Temperature accuracy
Selectable via parameter
-20…60°C (-4…140°F)
0.5°C (1°F) at 0…50°C (32…122°F)
1.0°C (2°F) at <0°C (<32°F), >50°C (>122°F)
Type & range of temperature sensor
NTC (Sxx-Tn10): -40…140°C (-40…284°F)
Signal outputs
Relays outputs (SPST NO)
Insulation strength
between relays and system electronics
between neighboring contacts
Electronic control type
0…250 VAC, resistive load current 5A, inductive 2A
2500V to EN 60 730-1
2500V to EN 60 730-1
2.B (micro-disconnection)
Analog outputs
Output signal
Resolution
Maximal load
0…10 VDC
10 bit, 9,7 mV
Voltage signal: ≥1kΩ
Temperature
resolution
Displayed temperature
0.1°C (0.5°F)
Set point
0.5°C (1°F)
Network
Hardware interface
Max nodes per network
Max nodes per segment
RS485 in accordance with EIA/TIA 485
247
128 (TRA-F22x-A only)
Conductor wire
Impedance
Shielded Twisted Pair (STP) cable
100 –130 Ω
Galvanic isolation
The communication circuitry is non-isolated
Network topology
According Modbus manual (Modbus over serial line)
Recommended maximum length per chain
1200 m (4000 ft.)
Modbus
Communication standard
Modbus RTU (www.modbus.org)
Default setting
38400 baud rate, even parity, 1 stop bit
Communication speed (baud rate)
2400, 4800, 9600, 19200, 38400, 57600, 115200
Modbus RTU protocol (8 data bits)
no parity –1 or 2 stop bits;
even or odd parity –1 stop bit
Environment
Operation
Climatic conditions
Temperature
Humidity
To IEC 721-3-3
class 3K5
0…50 °C (32…122 °F)
<85 % RH non-condensing
Transport & storage
Climatic conditions
Temperature
Humidity
Mechanical conditions
To IEC 721-3-2 and IEC 721-3-1
class 3K3 and class 1K3
0…50 °C (32…122 °F)
<95 % RH non-condensing
class 2M2
Standards
Safety class
II (IEC 61140)
Degree of protection
IP30 to EN 60529
General
Material
Fire proof PC+ABS plastic (UL94 class V-0)
Dimensions front part (H x W x D)
Dimensions back part (H x W x D)
88 x 88 x 16 mm (3.5 x 3.5 x 0.6 in)
67 x 61 x 25 mm (2.6 x 2.4 x 1.0 in)
Weight (including package)
250 g (8.81 oz)
2.1 Product testing and certification
Declaration of
Conformity
Information on the conformity of our products can be found on our website
www.vectorcontrols.com on the corresponding product page under "Downloads".

TRA-F22x-A
TECHNICAL SPECIFICATIONS
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VECTOR
2.2 Dimensions, mm (inch)
For flush mounting, a 75 x 75 x 35 mm (3.0 x 3.0 x 1,4 inch) installation box or larger must be used.
See Ordering for recommended installation boxes (chapter 1.3, page 3).
2.3 Connection diagram
For details see the TRA-F22x-A installation sheet no. 70-000957 (www.vectorcontrols.com).
The wiring for the different predefined TRA-F22x-A applications can be found in chapter 5.6.3, page 19.
A typical connection of the TRA-F22x-A is shown below:
61(2.4)
16(0.6) 25(1.0)
88(3.5)
88(3.5)

TRA-F22x-A
OPERATION
Doc: 70-00-0958A V1.0, 20221102 © Vector Controls GmbH, Switzerland Page 6-34
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VECTOR
3Operation
Content of chapter
3.1 User interface ____________________________________________________________________________6
3.1.1 Button operation_______________________________________________________________________6
3.2 LCD Display _____________________________________________________________________________7
3.2.1 Operating modes ______________________________________________________________________7
3.2.2 Controlling modes______________________________________________________________________7
3.2.3 Large and small digits___________________________________________________________________8
3.2.4 Alarm messages _______________________________________________________________________8
3.2.5 Error messages________________________________________________________________________8
3.3 Temperature control _______________________________________________________________________8
3.4 Controller operation _______________________________________________________________________9
3.4.1 Operating mode _______________________________________________________________________9
3.4.2 Controlling Mode_______________________________________________________________________9
3.4.3 Temperature control ___________________________________________________________________10
3.4.4 Fan speed ___________________________________________________________________________10
3.4.5 Controller start up ____________________________________________________________________10
3.4.6 Power Failure ________________________________________________________________________11
3.5 View input status (RT1/RT2)________________________________________________________________11
3.1 User interface
3.1.1 Button operation
Symbol
Function
Description
Operating mode
(Return)
Operating mode selection (Comfort Mode, Economy Mode, Protection Mode)
Menu navigation: Return to top menu
Controlling mode
(Return)
Controlling mode selection (Heating Mode, Cooling Mode, Fan Only)
Menu navigation: Return to top menu point
Long press: Switch °C/°F
Down
(-)
Adjust temperature set points and control parameters
Up
(+)
Adjust temperature set points and control parameters
Fan
(Enter, Save)
Change fan mode (auto mode or fan speed)
Menu navigation: Enter menu point
Parameter change: Save parameter
Long press: Display external input status
°C/°F

TRA-F22x-A
OPERATION
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VECTOR
3.2 LCD Display
1
Controlling Mode (see chapter 3.2.2)
8
Dew point alarm (see chapter 3.2.4)
2
Operating Mode (see chapter 3.2.1)
9
Fan auto mode
3
Temperature set point or parameter setting
active
10
Floor heating
4
Room temperature large digits
11
Electric heater
5
Room temperature small digits
12
Fan speed (low, medium, high)
6
Keys locked
13
Large digits (see chapter 3.2.3)
7
Alarm (see chapter 3.2.4)
14
Small digits (see chapter 3.2.3, 3.2.4, 3.2.5)
, and not used.
3.2.1 Operating modes
Display
Mode
Description
Comfort
(occupied)
The controller maintains the Comfort temperature set point defined with parameter P300.
In Comfort mode, the fan can be set to auto or manual fan speed: Low, medium or high.
Economy
(unoccupied)
Controller maintains the Economy temperature set points defined with parameter P301 and
P302.
Protection
The controller runs in standby. The system is protected against overheating and frost if
enabled with parameter P303 and P304.
3.2.2 Controlling modes
Display
Mode
Description
Heating
Heating mode activates heater for temperatures below set point.
When the heating symbol is blinking, the heating valve is turned on. Also, the electric heater
or floor heating symbols are blinking if the heating valve is turned on.
Cooling
Cooling mode activates cooling equipment for temperatures above the set point.
When the cooling symbol is blinking the cooling valve is turned on.
Fan Only
The bars between the fan symbols show the fan speed.
10
9
2
3
4
5
6
7
8
12
13
14
11
1

TRA-F22x-A
OPERATION
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3.2.3 Large and small digits
The large digits show the measured room temperature (default setting) or the Comfort temperature set point
(configurable via parameter P101).
The small digits are off (default setting) or show the outdoor temperature from Modbus master (configurable via
parameter P101). Also, alarms and error messages are shown on the small digits.
The room temperature and temperature set point are given in °C or °F (according to parameter P102).
3.2.4 Alarm messages
Alarm messages with alarm symbol are shown on the small digits.
Small Digits
LCD symbol
Alarm condition
ALA1
Alarm
Dew point alarm from input RT1/2 (parameter P500/P502 = 7)
Dew point
ALA2
Alarm
Overheat protection alarm (only in Protection mode)
ALA3
Alarm
Frost protection alarm (only in Protection mode)
ALA4
Alarm
Electric heater overheat alarm
3.2.5 Error messages
Error messages are shown on the small digits.
Small Digits
Error condition
Err1
Built-in temperature sensor error. Sensor is damaged (open or short circuit).
Err2
Temperature sensor RT1/RT2 error. The temperature sensor is not present. Verify wiring or
parameter configuration. -99.9 is shown on large digits.
Err3
Digital input error. RT1/2 is not fully opened or closed (resistor between 2.5kΩand 350kΩ). Verify
wiring or parameter configuration.
Err4
Configuration error: A parameter is set in an invalid combination with another parameter. Err4 and
one of the conflicting parameters are displayed alternating.
Err5
Time error: Set time and acknowledge error.
3.3 Temperature control
The thermostat measures the room temperature via built-in sensor or external room temperature sensor and maintains
the set point temperature by controlling the fan speeds and the heating and/or cooling valve (or the electric heater). The
following control outputs are available:
•on/off valve
•Modulating valve
•3-position valve (only for 2-pipe systems)
The switching differential or proportional band is 2°C for heating mode and 1°C for cooling mode (configurable via
parameters P400 and P401).
The default integral time is 5 minutes (adjustable via parameter P402 with 300 seconds as default value).

TRA-F22x-A
OPERATION
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VECTOR
3.4 Controller operation
Enable or disable of economy mode and change of set point, fan speed, controlling mode or any user operation
can be done via parameter settings (see parameter P104 to P108, default is ON and key lock disabled).
3.4.1 Operating mode
The controller operating mode can be switched between Comfort and Economy Mode with the operating mode button
( ).
The controller is switched to Protection Mode by pressing the operating mode button ( ) for 2 seconds.
Confort Mode
Economy Mode
Protection Mode
If Economy mode is disabled (see parameter P103), the controller operating mode is switched between Comfort
and Protection mode with the operating mode button ( ).
Comfort Mode
In Comfort mode, the controller measures the room temperature via built-in sensor or external room temperature sensor
and maintains the temperature of the Comfort set point by controlling the fan speeds and the heating and/or cooling valve
(or the electric heater).
Economy Mode
In Economy mode, the controller measures the room temperature via built-in sensor or external room temperature sensor
and maintains the temperature of the Economy set point by controlling the fan speeds and the heating and/or cooling
valve (or the electric heater).
The temperature of the Economy set point depends on the controller configuration (see parameter P301 and P302).
Protection Mode
In Protection mode, the system is protected against frost (default 5 °C, see parameter P304) and protected against
overheating (default OFF) (see parameter P303).
3.4.2 Controlling Mode
The controlling mode of the controller can be switched between Heating Mode, Cooling Mode and Fan Only by pressing
the controlling mode button ( ).
Heating Mode
Cooling Mode
Fan Only
Depending on the configured application (see parameter P200), cooling or heating can’t be selected as controlling
mode.
Heating Mode
In heating mode, the controller measures the room temperature via built-in sensor or external room temperature sensor
and maintains the requested temperature (according to the Operating Mode Comfort, Economy or manual setting), by
controlling the fan speeds and the heating valve (or the electric heater).
Cooling Mode
In cooling mode, the controller measures the room temperature via built-in sensor or external room temperature sensor
and maintains the requested temperature (according to the Operating Mode Comfort, Economy or manual setting), by
controlling the fan speeds and the cooling valve.

TRA-F22x-A
OPERATION
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Fan Only
In fan only mode, the fan speed can be set with the up ( ) or down ( ) button.
Heating or cooling is deactivated.
Fan Only (low)
Fan Only (medium)
Fan Only (high)
Note: The graphics shown are with 3-stage fan setting.
3.4.3 Temperature control
The comfort temperature set point can be adjusted in 0.5°C (1°F) steps with the up ( ) and down ( ) button and saved
ether with the operating mode button ( ), the controlling mode button ( ) or the fan button ( ). The Set symbol is
shown on the display while changing the temperature.
Confort mode (example)
Temperature up
Temperature up
If the Economy mode is active, pressing the up ( ) or down ( ) button will change the controller into the
comfort mode.
3.4.4 Fan speed
The fan speed can be changed between auto, low, medium and high fan speed by pressing the fan button ( ).
With analog fan, the fan speed can be changed between auto and 1 to 6.
Fan auto
Fan low
Fan medium
Fan high
3.4.5 Controller start up
Normal start-up
During start-up, the backlight of the display and all LCD segments are shown for two seconds. Then the software version
and revision are shown for two seconds on the small digits (format: 1r0, means version 1 revision 0).
For TRA-F221-A, the Modbus address of the controller is shown for two seconds.
Display test
Software version (example)
Modbus address (example)

TRA-F22x-A
OPERATION
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VECTOR
Start-up with Modbus address not set (after initial installation)
During start-up, the backlight of the display and all LCD segments are shown for two seconds. Then the software version
and revision are shown for two seconds on the small digits (format: 1r0, means version 1 revision 0).
After the software version, the Modbus address can be set with the up ( ) or down ( ) button and stored with the fan
button ( ).
You can leave the set menu without saving the Modbus address by pressing the operating ( ) or controlling ( ) mode
button.
Display test
Software version (example)
Set Modbus address menu (alternating)
If no address is entered, set mode is left automatically after 10 minutes. The address set menu will appear again
on the next start-up.
After these steps the controller runs in comfort, economy or protection mode.
3.4.6 Power Failure
All temperature set points and parameters are automatically saved and do not need to be re-entered.
Upon return of power, the controller will start in Protection, Comfort or the same mode, according to the controller
configuration (see parameter P110).
3.5 View input status (RT1/RT2)
Press the fan button ( ) for minimum 3 seconds to enter the input menu. The input status of RT1 and RT2 is displayed in
alternation.
RT1 as digital input
RT1 as temperature input
RT2 as digital input
RT2 as temperature input
The status of the inputs is displayed:
Large Digits
Small digits
Condition
on/off
In 1
RT1 configured as NO/NC digital input
Temperature
in °C/°F
In 1
RT1 configured as NTC temperature sensor
on/off
In 2
RT2 configured as NO/NC digital input
Temperature
in °C/°F
In 2
RT2 configured as NTC temperature sensor
Press the Operating ( ) or Controlling ( ) Mode button to leave the menu. After one minute the input menu is left
automatically.

TRA-F22x-A
SETUP
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4Setting up the controller
4.1 Mounting and installation
For details see the TRA-F22x-A installation sheet no. 70-000957 (www.vectorcontrols.com).
4.2 Sealing of cable entries
Important!
All cable entries into the connection box must be sealed to prevent air drafts, which could otherwise affect the
sensors in the device and prevent correct measurements!
4.3 Selection of actuators and sensors
Temperature sensors:
Use Vector Controls NTC sensors to achieve maximum accuracy, see ordering list in chapter 1.3, page 3.
Binary auxiliary devices (e.g. fans, on/off valves, etc.):
Do not directly connect devices that exceed specified limits in technical specifications –observe startup current on
inductive loads.
4.4 Electrical connection of external inputs
Use only twisted pair copper conductors for input connections. The operating voltage must comply with the requirements
for safety extra-low voltage (SELV) as per EN 60 730.
4.5 Power Failure
All temperature set points and parameters are automatically saved and do not need to be re-entered.
4.6 Modbus wiring (TRA-F221-A only)
4.6.1 Wire type
An EIA-485 network shall use shielded, twisted-pair cable for data signaling with characteristic impedance between 100
and 130Ωs. Distributed capacitance between conductors shall be less than 100 pF per meter (30 pF per foot). Distributed
capacitance between conductors and shield shall be less than 200 pF per meter (60 pF per foot). Foil or braided shields
are acceptable.
4.6.2 Line termination
On last node on either end of the bus connect a 120Ωtermination resistor between (+) and (-).
4.6.3 Maximum length
The maximum recommended length per segment is 1200 meters (4000 feet) with AWG 18 (0.82 mm2) conductor area
cable.
4.6.4 Shield connection
See Ashrae Standard 135 for detailed recommendation regarding how to connect the shield depending on type of nodes
present in the network.
4.6.5 Communication wiring
On last node on either end of bus only:
Connect 120Ω termination resistor between Modbus - and Modbus +.
RS485 shielded twisted pair cable
RS485
slave
node
RS485
slave
node
RS485
slave
node
- +
Modbus -
Modbus +
Note:
GND ≠ Modbus Common!
120Ω
Balanced pair
TRA-F221-A controller

TRA-F22x-A
CONFIGURATION
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5Configuration (parameter options)
Content of chapter
5.1 Parameter usage_________________________________________________________________________13
5.1.1 Parameter number, resolution and data format ______________________________________________13
5.1.2 Modbus access (TRA-F221-A only) ________________________________________________________14
5.2 Setting controller parameter with user interface_________________________________________________14
5.3 Modbus settings (TRA-F221-A only) __________________________________________________________14
5.3.1 Parameter P00x overview_______________________________________________________________14
5.4 Operating options ________________________________________________________________________15
5.4.1 Parameter P1xx overview _______________________________________________________________15
5.5 Quick system and output configuration (application specific) _______________________________________16
5.5.1 Parameter P000 overview_______________________________________________________________16
5.5.2 Application modes: Wiring diagrams of outputs ______________________________________________16
5.6 System and output configuration ____________________________________________________________17
5.6.1 Parameter P2xx overview _______________________________________________________________17
5.6.2 Application modes: Valve control diagrams _________________________________________________18
5.6.3 Application modes: Wiring diagrams of outputs ______________________________________________19
5.6.4 Manual vs. auto heat/cool change ________________________________________________________20
5.6.5 3-position valve control ________________________________________________________________21
5.6.6 Modulating valve control________________________________________________________________21
5.6.7 Fan extension time for electric heater _____________________________________________________21
5.6.8 Periodic fan kick ______________________________________________________________________21
5.6.9 Floor heating system with or without floor temperature limitation ________________________________21
5.7 Set points ______________________________________________________________________________22
5.7.1 Parameter 3xx overview________________________________________________________________22
5.7.2 Temperature set point types ____________________________________________________________22
5.8 Control settings _________________________________________________________________________24
5.8.1 Parameter 4xx overview________________________________________________________________24
5.8.2 Proportional control (proportional band or switching differential) _________________________________24
5.8.3 Integral control (integral time) ___________________________________________________________24
5.8.4 On/Off control________________________________________________________________________25
5.8.5 3-position control _____________________________________________________________________25
5.8.6 Modulating control ____________________________________________________________________25
5.8.7 Graphics for modulating and 3-position control ______________________________________________25
5.8.8 On/Off control for 4-pipe application heating and cooling mode__________________________________26
5.8.9 Modulating control for 4-pipe application heating and cooling mode ______________________________26
5.8.10 Analog fan control in automatic mode (on/off control) _________________________________________27
5.8.11 Analog fan control for modulating and 3-position valve ________________________________________27
5.8.12 3-stage fan control in automatic mode (Modulating valve)______________________________________27
5.9 Temperature and digital inputs ______________________________________________________________28
5.9.1 Parameter P5xx overview _______________________________________________________________28
5.9.2 P500/502: 2 = Heat/cool changeover or floor temperature sensor (NTC or DI)______________________28
5.9.3 P500/502: 3/4 = Occupation sensor_______________________________________________________29
5.9.4 P500: 5 = Door switch (DI) and P502: 3 or 4 = Occupation sensor (DI) ___________________________29
5.9.5 P500/502: 7 = Dew point sensor _________________________________________________________29
5.9.6 P500/502 digital input assignment ________________________________________________________29
5.10 Load and store default settings______________________________________________________________30
5.10.1 With user interface ____________________________________________________________________30
5.10.2 With Modbus_________________________________________________________________________30
5.1 Parameter usage
5.1.1 Parameter number, resolution and data format
Parameter number and Modbus data address are the same. They are listed in column “Par/Addr” as decimal number.
E.g. P001 is parameter 001 and has Modbus data address 1.
All temperature related parameters are given in °C for Modbus. Only in the user interface values can be shown in °F.
Parameters without multiplier have a resolution of 1. Parameters with multiplier 10 have a resolution of 0.1.
For example, the default value of the Comfort temperature set point (P300) is 20.0°C and the value read via Modbus is
200 (because multiplier 10 is used for P300).
The multiplier is only used for Modbus data access. On the user interface, the values are displayed in normal resolution.
Parameter with values below 0 (zero) are given as signed integer values.

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5.1.2 Modbus access (TRA-F221-A only)
The controller supports the following Modbus function cods:
Modbus function code
Data
Read multiple register (0x03)
Read n registers (n x 2 bytes) starting from requested address.
Write register (0x06)
Write 1 register (2 bytes) at requested address.
Write multiple registers (0x16)
Write n register (n x 2 bytes) starting from sent address.
Note: The read/write capability of each parameter is defined in column “R/W”. Most parameters can be read and written
defined as “R/W”. Read only parameters are defined as “R”.
5.2 Setting controller parameter with user interface
Entering the password protected parameter menu
1. Press the up ( ) and down ( ) button for at least 3 seconds.
2. The software version is displayed.
3. To continue to the password menu, press ether the up ( ), down ( ) or fan button ( ).
4. Enter the code 241 with the up ( ) or down ( ) button.
5. Confirm the code with the fan button ( ).
Software version (example)
Password
Password entered
Password not valid
Setting parameters
1. Press the up ( ) or down ( ) button to select the desired parameter.
2. To set the value of parameter, press the fan button ( ) then adjust the value with the up ( ) or down ( )
button and save the setting by pressing the fan button ( ) again.
Exit the parameter menu
Press the Operating ( ) or Controlling ( ) Mode button to leave the parameter menu.
5.3 Modbus settings (TRA-F221-A only)
5.3.1 Parameter P00x overview
Each Modbus slave device needs a unique device address (ID) in the network. It can be set with P001. All other Modbus
network properties can be set with parameter P002, P003 and P006.
With parameter P005 the write access to the parameter via Modbus master is disabled (except P005 can always be
written).
P004 is not used.
Par/
Addr
Description
Data type / value
Default
R/
W
P001
Modbus device address (ID)
Address range: 1…247
1
R/
W
P002
Baud Rate Modbus RS485
0 = 2400 BPS
1 = 4800 BPS
2 = 9600 BPS
3 = 19200 BPS
4 = 38400 BPS
5 = 57600 BPS
6 = 115200 BPS
4
R/
W
P003
Parity and stop bits
0 = NO Parity, 2 stop bits
1 = EVEN Parity, 1 stop bit
2 = ODD Parity, 1 stop bit
3 = NO Parity, 1 stop bit
1
R/
W
P004
Mode of communication
Not used (always 1 = RTU)
1
R
P005
Allow changing of parameter settings through
communication
0 = Not allowed (except P005)
1 = Allowed
1
R/
W
P006
Modbus address PLC style
0 = No offset
1 = PLC address style (+1 address offset)
0
R/
W

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5.4 Operating options
5.4.1 Parameter P1xx overview
With parameter P100 –P102 the displayed content can be set.
With parameter P104 –P109 the access via user interface can be restricted.
With P103 the Economy mode can be disabled (default is enabled).
With P110 the controller state after power failure can be set.
When P102 is set to °F, only the user interface values are displayed in °F. The values in the parameter menu are
always in °C.
Par/
Addr
Description
Data type / value
Default
R/
W
P100
Standard temperature display
(large digits)
0 = Room temperature (built-in sensor or external
NTC on RT1/2)
1 = Set point of running operating mode
0
R/
W
P101
Display on small digits
0 = No display
1 = Outdoor temperature (via Modbus)
0
R/
W
P102
Selection of temperature unit
0 = °C
1 = °F
0
R/
W
P103
Enable Economy mode
0 = OFF = Economy mode disabled
1 = ON = Economy mode enabled
1 = ON
R/
W
P104
Enable temperature unit change
with button (long press)
0 = OFF = Changing disabled
1 = ON = Changing enabled
1 = ON
R/
W
P105
Enable change of temperature set
points via user interface
0 = OFF = Change of set points disabled
1 = ON = Change of set points enabled
1 = ON
R/
W
P106
Enable manual control of fan
speeds via user interface
0 = OFF = Manual control of fan speeds via user
interface disabled
1 = ON = Manual control of fan speeds via user
interface enabled
1 = ON
R/
W
P107
Enable manual control of
heat/cool/fan only via user
interface
0 = OFF = Manual control of heat/cool/fan only
disabled
1 = ON = Manual control of heat/cool/fan only enabled
1 = ON
R/
W
P108
Key lock (No button operation)
0 = Disabled
1 = Keys locked (Press 5 sec Up ( ) and Down ( )
button, then 5 sec Operating ( ) and Controlling
Mode buttons ( ) to unlock. After 5min without user
action the buttons are locked again.)
0
R/
W
P109
Enable all parameter for user
interface (P001 to P506)
0 = Disable (parameter can only be changed from
Modbus master)
1 = Enable (parameter can be changed from user
interface)
1
R/
W
P110
State after power failure
0 = Protection mode (OFF)
1 = Comfort mode (ON)
2 = State before power failure
2
R/
W

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5.5 Quick system and output configuration (application specific)
A set of predefined system and output parameters allows for easy selection of a typical TRA application.
With P000, it is possible to select from a set of predefined configurations.
Using a predefined configuration will override some of the affected P200, P201 and P203 parameters accordingly.
If one of the preset P200, P201 or P203 parameters is changed, P000 will be reset to 0.
Note: Changing P000 will affect the output assignment, depending on the chosen configuration. The position of valve and
fan may change. See 5.6.3, page 19.
Par/
Addr
Description
Data type / value
Default
R/
W
P000
Use a predefined application configuration
Range: 0…22
0
R/
W
5.5.1 Parameter P000 overview
The following predefined system configurations are available:
P000 value
Description of predefined system configurations (application)
0
Default TRA application
1
2-pipe heating only, on/off valve, analog fan
2
2-pipe cooling only, on/off valve, analog fan
3
2-pipe manual heating or cooling, on/off valve, analog fan
4
2-pipe automatic heating or cooling, on/off valve, analog fan, changeover sensor at RT1
5
2-pipe heating only, modulating valve, 3 stage fan
6
2-pipe cooling only, modulating valve, 3 stage fan
7
2-pipe manual heating or cooling, modulating valve, 3 stage fan
8
2-pipe automatic heating or cooling, modulating valve, 3 stage fan, changeover sensor at RT1
9
2-pipe cooling only with electric heater, on/off valve, analog fan;
10
4-pipe manual heating or cooling, on/off valve, analog fan
11
4-pipe auto heating or cooling, on/off valve, analog fan, RT1 as digital changeover input (NO)
12
4-pipe heating and cooling, on/off valve, analog fan
13
Floor heating, on/off valve
14
Floor heating, modulating valve
15
Chilled ceiling, modulating valve
16
Chilled ceiling, on/off valve
17
Chilled ceiling, on/off valve, electric heater
18
Heated/chilled ceiling, on/off valve
19
Heated/chilled ceiling, modulating valve
20
4-pipe manual heating or cooling, 2 modulating valves, 3 stage fan
21
4-pipe auto heating or cooling, 2 modulating valves, 3 stage fan, RT1 as digital changeover input (NO)
22
2-pipe manual heating or cooling, modulating valve, analog fan
23
2-pipe manual heating or cooling, 3-point valve, analog fan
24
Chilled ceiling, modulating valve, electric heater
Depending on the desired functionality of the TRA control, additional configuration may be required.
A detailed description of the system and output configuration can be found in chapter 5.6 System and output
configuration, page 17.
5.5.2 Application modes: Wiring diagrams of outputs
An overview of the of the application specific output wiring diagrams can be found in chapter 5.6.3, page 19.

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5.6 System and output configuration
5.6.1 Parameter P2xx overview
With parameter P200 –P203 the installed application and valve type can be selected.
With parameter P204 –P206 the valve characteristics can be set.
With parameter P207 –P214 the fan configuration can be set.
Par/
Addr
Description
Data type / value
Default
R/
W
P200
Application mode:
2-pipe system: 0…3
4-pipe system: 4…6
0 = Heating only
1 = Cooling only
2 = 2-pipe manual heating or cooling
3 = 2-pipe auto heat/cool changeover
4 = 4-pipe manual heating or cooling
5 = 4-pipe auto heat/cool changeover
6 = 4-pipe Heating and cooling
7 = Floor heating system
8 = Chilled ceiling system
9 = Heated/chilled ceiling system
0
R/
W
P201
Enable electric heater
0 = OFF = Electric heater disabled
1 = ON = Electric heater enabled
0 = OFF
R/
W
P202
Fan stop delay after electric heating
0…600 sec
60
R/
W
P203
Valve type of heating/cooling system
Note: Changing this parameter
will change output wiring! See
Note1
0 = on/off valve
1 = 3-position valve (only for 2-pipe systems)
2 = Modulating valve 0-10V
3 = Modulating valve 2-10V
2
R/
W
P204
3-position valve running time
20…500 sec
150 sec
R/
W
P205
Minimum on time of valve for on/off
type
1…30 min
1 min
R/
W
P206
Minimum off time of valve for on/off
type
1…30 min
1 min
R/
W
P207
Number of fan speeds
Note: Changing this parameter
will change output wiring! See
Note1
1 = 1 fan speed (only DO1)
3 = 3 fan speeds
4 = Analog fan (AO1)
3
R/
W
P208
Minimum on time of each fan speed
10…600 sec
120 sec
R/
W
P209
Low fan speed switch on level
(Switch off level 15% lower or 0%)
Note: Ignored for on/off valve (and
electric heater), see chapter 5.8
Control settings
0…25 %
10 %
R/
W
P210
Medium fan speed switching point
(Switch off level 15% lower)
30…75 %
60 %
R/
W
P211
High fan speed switching point
(Switch off level 15% lower)
80…100%
100 %
R/
W
P212
Fan kick period
0 = OFF = Fan kick disabled
5…1500 = period in minutes
0 = OFF
R/
W
P213
Minimum fan speed in auto mode
0 = Fan off
1 = Low speed (In analog fan mode, minimum fan
speed is at 20% of range: (P211-P209)*0.2+P209)
0
R/
W
P214
Minimum fan speed in manual mode
0 = Fan off
1 = Low speed
1
R/
W
P215
Number of fan speeds for analog fan.
(Used in manual fan mode only. In
auto mode, the fan is running
continuously variable between P209
and P211)
1 = One fan speed, Min = P209 and Max = P211
3 = 3 fan speeds, regularly distributed between
P209 and P211
6 = 6 fan speeds, regularly distributed between
P209 and P211
6
R/
W
Note 1: P203 will change the output assignment. See application overview for wiring.
-P203 = 0/1: DO01 and DO02 are used as valve outputs, AO01 is used as the 0-10V fan output.
-P203 = 2/3: DO01 to DO03 are used as 3-stage fan outputs, AO01 and AO02 are used as valve outputs.

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5.6.2 Application modes: Valve control diagrams
Detailed explanation of Comfort and Economy temperature set points are given in chapter 5.7 Set points, page 22.
Detailed explanation of on/off or 3-position valve control are given in chapter 5.8 Control settings, page 24.
Detailed explanation of auto heat/cool changeover are given in chapter 5.9 Temperature and digital inputs, page 28.
Affected Parameters
Parameter Description
P200
Application mode
Application mode
P200 setting
Valve control diagram (comfort mode)
2-pipe system
Heating only
0
Floor heating system
7
2-pipe system
Cooling only
1
Chilled ceiling system
8
2-pipe system
manual heating or cooling
2
4-pipe system
manual heating or cooling
4
Heated/chilled ceiling
9
2-pipe system
auto heat/cool changeover
3
4-pipe system
auto heat/cool changeover
5
4-pipe system
Heating and cooling
6
W
T [°C]
100
0
W: Comfort
set point
W
100
0
T [°C]
W
100
0
T [°C]
User & Modbus
W
100
0
T [°C]
NTC / DI
W
100
0
T [°C]

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5.6.3 Application modes: Wiring diagrams of outputs
Affected Parameters
Parameter Description
P200
Application mode
P201
Enable electric heater
P203
Valve type of heating/cooling system
P207
Number of fan speeds
P215
Number of fan speeds for analog fan
System
P000 predefined settings
P200, P201, P203,
P207, P215 settings
Wiring diagram of outputs
•2-pipe system
•on/off valve
•DO1: Heating or cooling
•AO1: 0-10V analog Fan
1 =
Heating only
Analog fan
P200
0, 1, 2 or 3
P201
0 = OFF
2 =
Cooling only
Analog fan
P203
0 = on/off valve
P207
4 = Analog fan
3 =
Manual heating or cooling
Analog fan
4 =
Automatic heating or cooling
Analog fan
P215
6 = 6 fan speeds (in
manual fan mode)
•2-pipe system
•Modulating valve
•Heating or cooling
•AO1: 0-10V modulating
valve
•DO1-3: 3 stage fan
5 =
Heating only
3-stage fan
P200
0, 1, 2 or 3
P201
0 = OFF
6 =
Cooling only
3-stage fan
P203
2 = 0-10V Modulating
valve
P207
3 = 3 fan speeds
7 =
Manual heating or cooling
3-stage fan
8 =
Automatic heating or cooling
3-stage fan
•2-pipe system cooling
only with electric heater
•on/off cooling valve
•DO1: Cooling
•DO2: Electric Heater
•AO1: 0-10V analog Fan
9 =
Cooling with electric heater
Analog fan
P200
1 = Cooling only
P201
1 = ON = Electric
heater enabled
P203
0 = on/off valve
P207
4 = Analog fan
P215
6 = 6 fan speeds (in
manual fan mode)
•4 pipe system
•on/off valve
•Heating and/or cooling
•DO1: Cooling
•DO2: Heating
•AO1: 0-10V analog Fan
10 =
Manual heating or cooling
3-stage fan
P200
4, 5 or 6
P201
0 = OFF
11 =
Auto heating or cooling
RT1 as normally open DI
3-stage fan
P203
0 = on/off valve
P207
4 = Analog fan
12 =
Heating and cooling
3-stage fan
P215
6 = 6 fan speeds (in
manual fan mode)
•Floor heating system
•on/off valve
•DO1: Heating
13 =
Floor heating
On/off valve
P200
7 or 9
P201
0 = OFF
18 =
Heated/Chilled ceiling
On/off valve
P203
0 = on/off valve
P207
Any value

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System
P000 predefined settings
P200, P201, P203,
P207, P215 settings
Wiring diagram of outputs
•Floor heating / chilled
ceiling system
•AO1: 0-10V modulating
valve
14 =
Floor heating
modulating valve
P200
7, 8 or 9
P201
0 = OFF
15 =
Chilled ceiling
modulating valve
P203
2 = Modulating valve
0-10V
P207
Any value
19 =
Heated/Chilled ceiling
modulating valve
•Chilled ceiling system
•DO1: Cooling
•DO2: Electric heater
(optional)
16 =
Chilled ceiling
On/off valve
P200
8 = Chilled ceiling
system
17 =
Chilled ceiling
On/off valve
Electric heater
P201
0 or 1 (optional electric
heater)
P203
0 = on/off valve
P207
Any value
•4 pipe system
•DO1-3: 3-stage Fan
•AO1: 0-10V Cooling valve
•AO2: 0-10V Heating valve
20 =
4-pipe manual heating or
cooling, 2 analog valves, 3
stage fan
P200
4, 5 or 6
P201
0 = OFF
P203
2 = Modulating valve
0-10V
21 =
4-pipe auto heating or
cooling, 2 analog valves, 3
stage fan, RT1 as digital
changeover input (NO)
P207
3 = 3 fan speeds
•2 pipe system
•AO1: 0-10V analog fan
•AO2: 0-10V modulating
valve
22
2-pipe manual heating or
cooling, analog valve and fan
No DO used
P200
0, 1, 2 or 3
P201
0 = OFF
P203
2 = Modulating valve
0-10V
P207
4 = Analog fan
P215
6 = 6 fan speeds (in
manual fan mode)
•2 pipe system
•AO1: Analog fan
•DO1/DO2: 3-position
valve
23
2-pipe heating or cooling, 3-
position valve
P200
0, 1, 2 or 3
P201
0 = OFF
P203
1 = 3-position valve
P207
4 = Analog fan
P215
6 = 6 fan speeds (in
manual fan mode)
•Chilled ceiling system
•AO1: Modulating valve
•DO2: Electric heater
24
Chilled ceiling system
(modulating valve) with
electric heater enabled
P200
8
P201
1 = ON
P203
2 = modulating valve
0-10V
5.6.4 Manual vs. auto heat/cool change
Manual heating or cooling allows the user interface (via Controlling Mode button ) and Modbus master to change
between heating and cooling. No input (RT1/2) can use the function “Heat/cool changeover” (P400/P402 = 2).
To allow only Modbus master control the heat/cool state parameter, P107(Enable manual control of heat/cool/fan only)
must be set to 0 = OFF. Modbus master can control the Controlling mode (heat/cool/fan only) with controller runtime data
D1101.
Auto heat/cool changeover allows one of the inputs (RT1/2, where RT1 has higher priority) to act as a control input for
heat/cool changeover. See chapter 5.9 Temperature and digital inputs, page 28. User interface and Modbus master
control of heat/cool change are disabled in auto heat/cool application (P200 = 3 or 5). Via user interface the user can only
change to fan only.