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Safe position - spring return

Safe position - spring return

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BUDNF

Control component with dynamic transducer and separate spring return actuator for VAV terminal units


Universal device for use with VAV terminal units

  • Controller and dynamic differential pressure transducer in one casing
  • Separate actuator with spring return for safe positions 
  • Use in ventilation and air conditioning systems, only with clean air
  • Suitable for constant and variable volume flow rates
  • Activation of override controls via external wiring
  • Volume flow rates qvmin and qvmax are parameterised in the factory and saved in the controller
  • Modification of operating parameters by PC software as well as smartphone and tablet app (TROX FlowCheck app)
  • Service access for PC configuration software
  • Smartphone access via NFC interface and Bluetooth
  • Setpoint value settings, override controls and parameter adjustment via analogue interface or bus communication
  • High data transparency through standardised bus communication MP-Bus, Modbus RTU or BACnet MS/TP

 


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General information

Application

  • All-in-one control engineering device for VAV terminal units
  • Dynamic differential pressure transducer and control electronics in one casing
  • Separate actuator with spring return
  • Safe position can be defined upon failure of the supply voltage or wire breakage in the order code: NC = damper closed, NO = damper in OPEN position
  • For use only with clean air
  • Standard filtration in comfort conditioning systems allows for using the controller in the supply air without additional dust protection.
  • Choice of various control options based on setpoint value default setting
  • Volume flow rate control is based on setpoint values received from room temperature controller, central BMS, air quality controller or other devices as an analogue signal or via communication interface
  • Override controls for activating qvmin, qvmax, shut-off, OPEN position via MP-Bus data points or Modbus/BACnet register or switch/relay possible
  • The volume flow rate actual value is available as a network data point or as a linear voltage signal
  • The damper blade position is available as a network data point
  • Use the TROX FlowCheck app and PC tool to configure the controller and the communication parameters


With heavy dust levels in the room

  • Install suitable extract air filters upstream, as a partial volume flow is routed through the transducer for volume flow rate measurement

If the air is additionally contaminated, e.g. with fluff or sticky particles

  • Use of the BUSNF attachment group instead of the BUDNF universal controller described here

Control strategy

  • The volume flow controller works independent of the duct pressure
  • Differential pressure fluctuations do not result in permanent volume flow rate changes
  • To prevent the control from becoming unstable, a dead band is allowed within which the damper blade does not move
  • The flow rate range for the controller is set in the factory
    • qvmin: minimum volume flow rate
    • qvmax: maximum volume flow rate
  • Operating parameters are set in the factory according to the order code

Interface

Analogue interface

  • Analogue interface with adjustable signal voltage range
  • Analogue signal for volume flow rate setpoint
  • Analogue signal for volume flow rate actual value

Digital communication interface (bus)

  • MP bus
  • Modbus RTU, RS-485
  • BACnet MS/TP, RS-485
  • Data points, see bus lists

Hybrid mode

  • Mixed mode of analogue and digital interface

Factory setting

  • Setpoint value default setting via analogue interface
  • Actual value output via analogue interface and Modbus communication interface

Operating modes

Variable operation (V)

  • Setpoint value setting via analogue signal, Modbus, BACnet or MP-Bus: operating range corresponds to qvmin – qvmax

Constant value mode (F)

  • A setpoint signal is not required, setpoint value corresponds to qvmin

Operating parameters

  • The flow rate range for the controller is set in the factory
    • qvmin: minimum volume flow rate
    • qvmax: maximum volume flow rate
  • qvmin = 0 – 100 % of the nominal volume flow rate qvNom adjustable
  • qvmax = 20 – 100 % of the nominal volume flow rate qvNom adjustable

Signal voltage ranges



  • 0 – 10 V DC
  • 2 – 10 V DC



Parts and characteristics

  • Transducer for dynamic measurement principle
  • Separate actuator with simple connection plug
  • Plug-in terminals for power and bus cables, with cover
  • Socket for the actuator
  • NFC and service interfaces
  • Crank handle for manual winding of the spring return actuator
  • Release button to allow for manual operation
  • Indicator lights for displaying the operating mode
  • Addressing button to confirm the addressing request of an MP master (only in MP-Bus mode)
  • Controller casing prepared with 4 openings for cable glands; 2 cable glands M16 x 1.5 for connecting cable are part of the supply package

Construction

BUDNF with actuator LF24-VST for:

  • TVR, TVZ, TVA up to NW 250

BUDNF with actuator NF24A-VST for:

  • TVJ, TZ-Silenzio, TA-Silenzio all dimensions
  • TVR, TVZ, TVA, for NW 315 – 400
  • TVT up to dimension 1000 × 300 or 800 × 400

Commissioning


  • Due to the volume flow rates set in the factory, always ensure that the control units are only installed in the specified locations
  • Modbus/BACnet/MP bus interface: additional commissioning steps required
  • Operating parameters can be adjusted using the TROX FlowCheck app


Useful additions

  • TROX FlowCheck app for Android and iOS
  • Bluetooth-to-NFC converter ZIP-BT-NFC
  • Type ZTH-EU adjustment device (limited use)
  • Belimo PC-Tool software
  • X-AIRCONTROL zone modules for room control




Operating modes

Variable operation (V)

  • Setpoint value setting via analogue signal, Modbus, BACnet or MP-Bus: operating range corresponds to qvmin – qvmax

Constant value mode (F)

  • A setpoint signal is not required, setpoint value corresponds to qvmin


Signal voltage ranges



  • 0 – 10 V DC
  • 2 – 10 V DC

Technical information

Function, Specification text, Order code

  • Function
  • SPECIFICATION TEXT
  • ORDER CODE
Principle of operation Universal controller: TVR, TVJ, TVT, TZ-/TA-Silenzio, TVZ, TVA, TVRK XD4_gc_01ai.ai.link

① Differential pressure transducer

② Actuator

③ Volume flow controller

④ Setpoint value signal


A closed control circuit for regulation of the volume flow rate, i.e. measuring - comparing - adjusting, is characteristic of air terminal units.
The volume flow rate is recorded by measuring a differential pressure (effective pressure). This is done via a differential pressure sensor. An integrated differential pressure transducer converts the effective pressure into a voltage signal. The volume flow rate actual value is available as a voltage signal. The factory setting is such that an actual output signal of 10 V DC always corresponds to the nominal volume flow rate (qvnom).
The volume flow rate setpoint value is specified by a higher-level controller (e.g. room temperature controller, air quality controller, central BMS). Variable volume flow control results in a value between qvmin and qvmax. It is possible to override the room temperature control by override controls, e.g. by a complete shut-off of the duct.
The controller compares the volume flow rate setpoint value to the actual value and controls the external actuator accordingly to the system deviation. If the supply voltage is interrupted or the wire breaks, the spring return actuator moves to the fail-safe position OPEN (NO) or CLOSED (NC) as specified in the order code.


Category



  • Universal controller for volume flow rate with safe position


Application



  • Control of a constant or variable volume flow rate setpoint
  • Electronic controller for connecting a controlled variable and tapping an actual value signal
  • The actual value signal relates to the nominal volume flow rate such that commissioning and subsequent adjustment are simplified
  • Stand-alone operation or integration in central building management system


Area of application



  • Differential pressure transducer with dynamic measuring principle for clean air in ventilation and air conditioning systems


Actuator

  • Spring return actuator for defined safe position of the damper blade in case of power failure. Run time 120 s for 90°; run time spring return < 20 s for 90°

Installation orientation



  • either direction


Connection



  • Pluggable connection terminals; no additional terminal box required


Supply voltage



  • 24 V AC/DC


Interface/signalling



Analogue signal

  • 0 – 10 V DC or 2 – 10 V DC

Bus interface

  • MP bus
  • Modbus RTU
  • BACnet MS/TP


Interface information

Analogue:

  • Volume flow rate setpoint and actual value

Bus interface:

  • Volume flow rate setpoint and actual value
  • Damper blade position
  • ​​​​​​​Fault status


System connections

MP-Bus for optional extensions

  • Suitable for TROX X-AIRCONTROL zone module X-AIR-ZMO-MP
  • Gateways for Modbus, BACnet, KNX, e.g. Belimo UK24EIB
  • Fan optimiser, e.g. Belimo COU24-A-MP

Modbus RTU for optional extensions

  • Suitable for TROX X-AIRCONTROL zone module X-AIR-ZMO-MOD, e.g. in conjunction with X-SENS-SPLITTER


Special functions



  • Activation qvmin, qvmax, Closed, Open, Control Stop by means of external switching contacts/wiring or bus communication


Parameter setting



Parameters specific to VAV terminal unit parameterised at the factory

  • Operating values qvmin, qvmax factory parameterised
  • Signal characteristic factory parameterised

Subsequent adjustment

  • Via TROX FlowCheck app (NFC or Bluetooth with optional adapter)
  • Via PC software


Factory condition



  • Electronic controller factory-mounted on the terminal unit
  • Factory parameter settings
  • Functional test under air; certified with sticker



Control component BUDNF (shown together with TVR as an example)
TVRDP1/200/D2/BUDNF/V0/500 – 1200 [m³/h] /NO
|||||||||||
12345679101112
1 Type
TVR
VAV terminal unit

2 Acoustic cladding
No entry: none
D With acoustic cladding

3 Material
No entry: galvanised sheet steel
P1 Powder-coated RAL 7001 (silver grey)
A2 Stainless steel construction

4 Duct connection
No entry: push-fit, suitable for ducts according to EN 1506; with groove for optional lip seal
FL Flanges both ends (not for TVR-D-P1)

5 Nominal size [mm]
100, 125, 160, 200, 250, 315, 400

6 Accessories

No entry: without accessories
D2 Double lip seal both ends (push-fit only)
G2 Matching flanges for both ends (only with FL)

7 Attachments (control component)
BUDNF
Universal volume flow rate controller with dynamic transducer and separate spring return actuator

9 Operating mode
F
Constant value mode (one setpoint value, no external switch contact)
V Variable operation (adjustable setpoint value range)

10 Signal voltage range
For the actual and setpoint value signals
0 0 – 10 V DC
2 2 – 10 V DC

11 Operating values for factory setting
Volume flow rate [m3/h or l/s]

Depending on operating mode
F: qvconst
V: qvmin – qvmax

12 Damper blade position
NO Power off to open (Normally Open)
NC Power off to close (Normally Closed)


Order example: TVR-D-P1/200/D2/BUDNF/V0/500-1200[m³/h]/NO

TypeTVR
Acoustic claddingWith acoustic cladding
MaterialPowder-coated RAL 7001 (silver grey)
Duct connectionPush-fit, suitable for ducts according to EN 1506; with groove for optional lip seal
Nominal size [mm]200
AccessoriesDouble lip seal both ends
Attachments (control component)BUDNF – Universal controller with dynamic transducer and separate spring return actuator
Operating modeVariable operation
Signal voltage range2 – 10 V DC
Operating values for factory setting500 – 1200 [m3/h]
Damper blade positionPower off to open (Normally Open)

Variants, Product details

  • VARIANTEN
  • PRODUCT DETAILS


Digital communication interface
 

An on-site changeover using the smartphone app is necessary for a setpoint specification via the bus interface. The bus interface can be set to Modbus, BACnet and MP-Bus. For smooth data exchange in the on-site bus network, the communication parameters and user address must be set for the bus interface. The communication parameters for the bus systems (address, baud rate etc.) can be set using the smartphone app. The interface provides standardised bus register/object access to the available data points.

 

Setpoint value setting

  • In the operating mode Modbus RTU (factory setting), the setpoint value is only set by specifying the volume flow rate set point value [%] in the Modbus register 0.
  • The transferred percentage value refers to the volume flow rate range specified by qvmin  –  qvmax fixed volume flow rate range.
  • Volume flow rate range qvmin –  qvmax pre-set in the factory according to the order code entries.
  • Subsequent adjustment of qvmin  or qvmax possible using service tool smartphone app or Modbus/BACnet interface.

 

Actual value as feedback for monitoring or tracking control

  • The actual values can be read off in m³/h (factory setting) in both Modbus and BACnet. Other units such as m³/s, l/s, l/min, l/h, gpm, cfm possible.
  • In addition to the volume flow rate actual value, further information on other Modbus registers/BACnet objects can be read out. Overview of registers/objects in the communication tables.
  • For diagnostic purposes, the volume flow rate actual value can be tapped at terminal 5 in bus mode.
    The volume flow rate range 0 – qvnom here always corresponds to the signal voltage range of (0)2 – 10 V DC.

 

Override control

For special operating situations, the volume flow controller can be put in a special operating mode (override control). The following are possible: control qvmin, control qvmax, damper blade in the OPEN position or damper blade CLOSED.

 

Override control via the bus

This is set via the Modbus register 1 or via BACnet object type MO[1].

 

Override control via bus timeout monitoring (Modbus)

If the Modbus communication fails for a stipulated time period, a pre-defined operating mode qvmin, qvmax, OPEN or CLOSED can be activated.

  • The override control to be activated upon bus timeout is specified via Modbus register 108 or 109 
  • The time period after which override control is activated upon bus timeout is specified via Modbus register 109 or 110 
  • Each Modbus communication resets the timeout of the bus timeout monitoring

 

Override control via bus timeout monitoring (Modbus)

If the BACnet communication drops out for a specified time period, a predefined operating mode can be activated.

  • The setpoint value to be activated upon bus timeout is specified via Relinquish_Default from SpRel (object AO1)
  • Bus timeout period is defined via BusWatchdog (object type AV [130])
  • Communication on the datapoints SpRel (Object AO[1] and Override (Object MO[1])

 

Override controls for diagnostic purposes

Activation via bus system, external/on-site switch contacts (jumpers), and smartphone app.

 

Prioritisation of various setting options

Settings for override controls via analogue are prioritised over Modbus/BACnet settings.

  • Highest priority: setting via an analogue override control 
  • Medium priority: settings via the service connector (smartphone app) for test purposes
  • Lowest priority: setting via Modbus/BACnet/MP bus 

 


Technical data

  • PRODUCT DETAILS
  • VARIANTS

Universal controller for VAV terminal units

Controller

Actuator

Order code detail

Part number

Type

Part number

Type

VAV terminal units

BUDNFA00000073650VRU-D3-M/B TRA00000076097LF24-VST TR


BUDNFA00000073650VRU-D3-M/B TRA00000073648NF24A-VST TR


TVR, TVZ, TVA up to NW 250


TVR, TVZ, TVA from NW 315
TVJ
TVT up to dimension 1000 × 300 or 800 × 400

Universal controller VRU-D3-M/B TR

Type of measurement/installation orientation

dynamic measuring principle, position-independent

Nominal voltage

AC/DC 24 V
Rated voltage frequency50/60 Hz

Functional range

19.2 - 28.8 V AC or 21.6 - 28.8 V DC

Power consumption (when running/when idle)

1.5 W

Power requirement dimensioning

2 VA plus connected VST drive

Power consumption dimensioning note

Imax 20 A @ 5 ms

Drive connection

AC/DC supply through controller, PP-Link VST drive

Bus connection

Modbus RTU*, BACnet MS/TP, MP-Bus

Modbus RTU communication parameters to be set

Baud rate: 9600, 19200, 38400*, 76800, 115200;

Address: 1*,2.3 – 247;

Parity: 1-8-N-2*, 1-8-N-1, 1-8-E-1, 1-8-O-1;

Number of nodes: maximum 32 (without repeater)

Terminal resistor: 120 Ω, integral, can be activated

BACnet MS/TP communication parameters to be set

Baud rate: 9600, 19200, 38400*, 76800, 115200;

Address: 1*,2.3 – 127;

Number of nodes: maximum 32 (without repeater)

Terminal resistor: 120 Ω, integral, can be activated

Addressing

Required on site: through TROX FlowCheck App

Setpoint value signal input (analogue optional)

0 - 10 V DC, 2 - 10 V DC
Input resistance 100 kΩ

Actual value signal output

0 - 10 V, 2 - 10 V, maximum 0.5 mA

Protection class IEC/ENIII (protective extra-low voltage)
Protection levelIP 42

Weight

0.3 kg

EMC

CE according to 2014/30/EU

* Factory setting

Actuator with spring return LF24A-VST TR

Power supplyfrom the controller
Power consumption – when running

2.5 W

Power requirement dimensioning

5 VA

Self-consumption (idle state)

1 W

Torque

4 Nm

Run time for 90°

120 s/90°

Running time emergency control function

< 20 s/90°

Setpoint value signal inputfrom the controller
IEC protection classIII (protective extra-low voltage)
Protection level

IP 54

EMCEMC to 2014/30/EU
Weight

1.8 kg

Manual adjustment

by hand crank; locking by counter-rotation

Actuator with spring return NF24A-VST TR

Power supplyfrom the controller
Power consumption – when running

5 W

Power requirement dimensioning

8 VA

Self-consumption (idle state)

2.5 W

Torque

10 Nm

Run time for 90°

120 s/90°

Running time emergency control function

< 20 s/90°

Setpoint value signal inputfrom the controller
IEC protection classIII (protective extra-low voltage)
Protection level

IP 54

EMC

EMC to 2014/30/EU
Weight

2.3 kg

Manual adjustmentby hand crank and locking switch

Commissioning

 


  • As the volume flow rates are factory set, the terminal units have to be installed at the specified locations
  • After installation and wiring, the controller is ready for operation via the analogue interface
  • Comply with the volume flow rate control ranges of the VAV terminal units; do not set a volume flow rate lower than the minimum flow rate
  • Only briefly remove the protective cap of the control component during wiring
     

For bus operation, further commissioning steps are required depending on the required integration of the control component into the local network:



 


For operation with Modbus interface


  • Switching the setpoint to bus with the service tool
  • Bus protocol is already set in the factory from Modbus RTU; no adjustment required
  • Adjust Modbus participant address and communication settings

 

For operation with BACnet interface


  • Switching the setpoint to bus with the service tool
  • Switch bus protocol to BACnet MS/TP with service tool
  • Adjust BACnet subscriber address and communication settings

 


For operation with MP-Bus interface


  • Switching the setpoint to bus with the service tool
  • Switch bus protocol to MP-Bus with service tool
  • Adjusting the MP-Bus subscriber address and communication settings
  • For operation with MP-Bus interface in existing systems as a replacement for VRP-M controllers: Activation of VRP-M compatibility mode required

Functional scope of service tools

Function/parameter setting

TROX FlowCheck app

PC-Tool ¹

ZTH-EU

Setting of qvmin, qvmax

R, W ²

R, WR, W

Signal voltage range setting 0 – 10 V or 2 – 10 V DC for analogue interface

R, W ²

R, W
Setpoint value default setting via analogue connection or bus (Modbus, BACnet or MP bus)

R, W ²

R, W
Modbus, BACnet settings (address, communication parameters)

R, W ²

R, W
MP-Bus settings (address)

R, W ²

R, W
Execute override controls (test function)

yes ³

yes

Trend display

yes ³

yes

R, W = function is readable and writable


- = Function is not available for the service tool


 

¹ Requires interface converter, e.g. setting devices ZTH-EU


² Function/parameterisation is possible without connecting the controller to supply voltage


3 Function/parameterisation only in conjunction with ZIP-BT-NFC and connected power supply to the controller


 


For the proper use of the service tools, they should always be kept up to date with the latest software version.
Information on current versions/updates for PC-Tool software and setting device ZTH-EU on the Belimo homepage www.belimo.com.
Minimum versions for ZTH-EU firmware: V 2.09.0004


Modbus RTU communication interface

NumberRegister AddressDescriptionRange EnumerationUnitScalingAccess
1

0

Setpoint value between 


qvmin/Δpmin (reg. address 105) and


qvmax/Δpmax (reg. address 106)

(*1) (*2) (*3) (*4)

0 – 10,000

Factory setting: 0

%

0.01[R / W]
21

Override control


 


Overwrites the setpoint value with override control

0: None

1: OPEN

2: CLOSED

3: qvmin/Δpmin

5: qvmax/Δpmax

Factory setting: None

[R / W]
32

Command triggering 


 


Triggering of functions for service and test purposes. Command ends automatically with 0


 

0: None

1: Adapting

3: Synchronisation

Factory setting: None 

[R / W]
43

Type of actuator

 

(*5)

0: Actuator not connected/not known

1: Actuator Air/Water with/without safety function

2: Volume flow controller VAV/EPIV

3: Fire damper

4: Energy Valve

5: 6way EPIV

[R]
54

Current damper blade position acc. to mechanical limits


 


(*5)

0 – 10,000

%

0.01[R]
65

Blade angle acc. to angle range


 


(*5)

0 – 9,600

°

0.01[R]
76

Relative volume flow rate related to qvnom (reg. address 110)


 


(*6)

0 – 15,000

%

0.01[R]
87

Absolute volume flow rate

 

(*6)

0 – qvnom

m³/h

 

1[R]
98

Sensor value (voltage, resistance, switch)


Value dependent on the setting of the sensor type (reg. address 107)

0 – 65,535

 

mV,


Ω,


0/1

0.1[R]
109

-[–]
1110

Absolute volume flow rate in selected volume flow unit acc. to (reg. address 117)


 


(Low word) < 16 of 32 bit


 


(*6)

0 – 500,000,000

UnitSel

0.001[R]
1211

Absolute volume flow rate in selected volume flow unit acc. to (reg. address 117)


 


(High word) > 16 of 32 bit


 


(*6)

0 – 500,000,000

UnitSel

0.001[R]
1312

Analogue setpoint value 

 

Shows the setpoint value in % with analogue control input signal. Active if reg. address 118 = 0 (analogue)

0 – 10,000

%

0.01[R]
51

Relative differential pressure 


 


According to application case as per (reg. address 128)

0 – 20,000

%

0.01[R]
52

Absolute differential pressure

-1,000 – 15,000

[Pa]

0.1[R]
53

[–]
54

Absolute differential pressure in selected unit (reg. address 145)


(Low word) < 16 of 32 bit

-10,000,000 – 100,000,000

UnitSel

0.001[R]
55

Absolute differential pressure in selected unit as per (reg. address 145) 


 


(High word) > 16 of 32 bit

-10,000,000 – 100,000,000 

UnitSel

0.001[R]
10099

Bus terminal resistor 


 


Indicates whether the terminal resistor (120 Ω) is active or deactivated.


Can only be set using service tools.

0: Not active


1: Active


Factory setting: Not active

[R]
101100

Serial number, part 1


Example: 00839-31324-064-008


1st part: 00839


2st part: 31324


3st part: 008

[R]
102101

Serial number, part 2

[R]
103102

Serial number, part 3

[R]
104103

Firmware version

Example: 101, version 01.01.

[R]
105104

Malfunctions and service information –


automatic reset if status has ceased

Bit 0: –

Bit 1: Mechanical travel too high

Bit2: Actuator cannot be moved (e.g. mechanical overload)

Bit 3: –

Bit 4: Error of dP sensor

Bit 5: Return air flow detected

Bit 6: Volume flow rate too low

Bit 7: Flow rate in closed position

Bit 8: Internal activity (e.g. test run, adaptation)

Bit9: Gear release active

Bit10: Bus monitoring triggered

Bit 11: Actuator not suitable for application

Bit 12: Pressure sensor incorrectly connected

Bit 13: Pressure sensor not reached

Bit 14: Error in dP sensor outside of measuring range

[R]
106105

Setting work areas qvmin/Δpmin 


 


Requirements: qvmin/Δpmin < qvmax/Δpmax


Vmax in the area 0 – 100 % of qvnom/Δpnominal

0 – qvmax/Δpmax

 

%

0.01[R / W*]
107106

Setting work areas qvmax/Δpmax 

 

Requirements: qvmax/Δpmax < qvmin/Δpmin

Vmax in the area 20 – 100 % of qvnom/Δpnominal

2,000 10,000  

 

%

0.01[R / W*]
108107

Type of sensor 


 


If reg. address 118 = 0 (analogue), then reg. address 107 = 1 (active) for mV

0: None


1: Active


2: Passive


3: –


4: Switch


 


Factory setting: None

[R / W*]
109108

Bus timeout monitoring 

 

If there is a bus timeout, the actuator moves into a position specified here. 

The position is mech. limited, qvmin/Δpmin and qvmax/Δpmax have no impact.

Release if no change takes place in reg. address 1 or reg. address 2 in the specified time for reg. address 109.

Display of release in reg. address 104.

In hybrid mode, bus timeout activation is deactivated. 

 

 

Bus timeout time: acc. to reg. address 109

0 – 10,000

Factory setting: 0

%

0.01[R / W*]
110109

Time until release bus timeout monitoring

 

If reg. 108 ≠ 0, then the initial automatic status is reg. 108 = 120 s. 

0 – 3,600 


0: Inactive


Factory setting: Deactivated


 

s

1[R / W*]
113112

Nominal volume flow rate in selected volume flow unit acc. (reg. address 117)


 


(Low word) < 16 of 32 bit

0 – 60,000,000

UnitSel

0.001[R]
114113

Nominal volume flow rate in selected volume flow unit acc. (reg. address 117)


 


(High word) > 16 of 32 bit

0 – 60,000,000

UnitSel

0.001[R]
115114

[–]
116115

[–]
117116

Control mode

0: Position control (open loop)

1: Volume flow control

Factory setting: Volume flow control 

[R]
118117

Unit selection –


 


Unit selection for reg. address 11 and 12

0: –

1: m³/h

2: l/s

3: –

4: –

5: –

6: cfm

-

[R / W*]
119118

Setpoint value setting

 

If reg. address 118 = 0 (analogue), then reg. address 12 = active.

If reg. address 118 = 1 (Bus), then reg. address 1 = active.

 

0: Analogue (0 – 10 V, 2 – 10 V)

1: Bus (Modbus, BACnet, MP-Bus)

Factory setting: Analogue 

[R / W*]
120

Pressure operating mode 

 

Only for VRU-M1R-M/B TR.

0: Negative pressure

1: Positive pressure

 

[R / W*]
121

 

[–]
122

[–]
123

[–]
124

Room pressure cascade release 

 

Only available if reg. address 124 = 0 (volume flow control) or 2 (room pressure control).

 

 

0: Inactive


1: Active


2: Active fast (only for VRU-M1R-M/B TR)

[R]
125

Applications

 

 

0: Volume flow control

1: Pressure control

2: Room pressure control

3: Flow measurement

[R]
126

Unit height

0 – 3,000

Factory setting: 0

m

1[R / W*]
127

Nominal differential pressure in the selected unit as per (reg. address 145)

 

More info in (reg. address 128)

D3: 0 – 50000

M1: 0 – 60000

M1R: 0 – 60000

UnitSel

[R]
128

[–]
129

Nominal differential pressure in Pa 

 

If reg. address 124 = 0 (volume flow control), then reg. address 110 as qvnom.

If reg. address 124 = 1 (differential pressure control) or 2 (room pressure control), then the maximum is defined by the diff. pressure.

D3: 0 – 500

M1: 0 – 600

M1R: 0 – 750

Pa

0.1[R]
146

Selection of the pressure unit 

 

The selected unit is displayed in (reg. address 126).

0: Pascal


1: –


2: Water column


Factory setting: Pascal 

[R / W*]

[R] = Read-only access to register
[R/W] = Register readable and writable
[R/W*] = Register readable and writeable with restrictions; all writeable registers from 100 are persistent (stored in the EEPROM), regular or cyclical writing must be avoided.


(*1) If reg. addr. 118 = 1 (bus), then reg. addr. 0 = active

(*2) If reg. addr. 124 = 0 (flow rate control), then reg. addr. 0 = flow rate

(*3) If reg. addr. 124 = 0 (volume flow control) and reg. addr. 116 = 0 (position control), then reg. addr. = damper blade position

(*4) If reg. addr. 124 = 1 (differential pressure control) or 2 (room pressure control), then reg. addr. = pressure

(*5) If reg. addr. 124 = 2 (room pressure control) or 3 (volume flow measurement), then reg. addr. = deactivate 65.535

(*6) If reg. addr. 124 = 1 (differential pressure control) or 2 (room pressure control), then reg. addr. = deactivate 65.535

BACnet MS/TP - Protocol Implementation Conformance Statement - PICS (General information)

Date

2020-06-11

Vendor NameTROX GmbH
Vendor ID

329

Product NameVRU-D3-BAC, VRU-M1-BAC, VRU-M1R-BAC
Product Model NumberVRU - BAC
Applications Software Version

01.02.0001

Firmware revision

10.02.0000

BACnet Protocol Revision

12

Product DescriptionController for VAV/CAV and pressure applications
BACnet Standard Device ProfileBACnet Application Specific Controller (B-ASC)
BACnet Interoperability Building Blocks supported

Data Sharing – ReadProperty-B (DS-RP-B)
Data Sharing – ReadPropertyMultiple-B (DS-RPM-B)
Data Sharing – WriteProperty-B (DS-WP-B)
Data Sharing – WritePropertyMultiple-B (DS-WPM-B)
Data Sharing – COV-B (DS-COV-B)
Device Management – DynamicDeviceBinding-B (DM-DDB-B)
Device Management – DynamicObjectBinding-B (DM-DOB-B)
Device Management – DeviceCommunicationControl-B (DM-DCC-B)

Segmentation CapabilityNo
Data Link Layer OptionsMS/TP master, baud rates: 9600, 19200, 38400, 76800, 115200
Device Address BindingNo static device binding supported
Networking OptionsNone
Character Sets SupportedISO 10646 (UTF-8)
Gateway OptionsNone
Network Security OptionsNon-secure device

,

,

Communication interface BACnet MS/TP - Object processing

Object type

Optional properties

Writeable properties

Analog Input [AI]

Description
COV Increment

COV Increment

Analog Output [AO]

Description
COV Increment

Present Value
COV Increment
Relinquish Default

Analog Value [AV]

Description

COV Increment

Present Value

COV Increment

Binary Input [BI]

Description
Active Text
Inactive Text

Device

Description
Location
Active COV Subscriptions
Max Master
Max Info Frames
Profile Name

Object identifier
Object Name
Location
Description
APDU Timeout (1000 – 60000)
Number Of APDU Retries (0 – 10)
Max Master (1 – 127)
Max Info Frames (1 – 255)

Multi-state Input [MI]

Description
State Text

Multi-state Output [MO]

Description
State Text

Present Value
Relinquish Default

Multi-state Value [MV]

Description
State Text

Present Value (if marked)

Editing of services

  • The unit does not support the services "Create object" and "Delete object".
  • The specified maximum length of writable strings is based on single-byte characters.
  1. Object name 32 characters
  2. Location 64 characters
  3. Description 64 characters
  • The unit supports DeviceCommunicationControl services, no password required.
  • A maximum of 6 active COV subscriptions with a runtime of 1 - 28800 s (maximum 8 h) are supported.

Communication interface BACnet MS/TP - BACnet objects

Object NameObject TypeDescriptionValuesCOV IncrementAccess
Device

Device [Inst.No]

0 – 4,194,302

Factory setting: 1

WR
RelPosAI[1]

Damper blade position in %

 

Status flags: (*1), (*2)

0 – 100

0.01 – 100

Factory setting: 1

RD
AbsPosAI[2]

Absolute position in ° 

Angular position corresponding to the entire rotation range.

 

Status flags: (*1), (*2)

 

0 – max. angle

0.01 – 90

Factory setting: 1

RD
SpAnalogueAI[6]

Analogue setpoint value in %

Shows the analogue setpoint value according to the selected application flow rate, pressure, damper blade position as per ApplicationSel MV[2]. 
If setpoint value setting in SpSource MV[122] = 1 (analogue), then SpAnalog AI[6] = active.
The analogue setpoint value is limited by Min AV[97] and Max AV[98].
 

 

Status flags: (*1), (*3)

 

0 – 100

0.01 – 100

Factory setting: 1

RD
RelDeltaP

AI[9]

Relative differential pressure in % with respect to DeltaPnom_Pa AV[122]

 

 

0 – 150

0.01 – 150

Factory setting: 1

RD
RelFlowAI[10]

Relative volume flow rate in % related to Vnom_m3h AV[112]

 

Status flags: (*4)

0 – 150

0.01 – 150

Factory setting: 1

RD
AbsFlow_m3h

AI[12]

Absolute volume flow rate in m³/h

 

Status flags: (*4)

0 – 60,000

 

1 – 60,000

Factory setting: 10

RD
DeltaP_UnitSel

AI[18]

Absolute differential pressure in selected unit as per UnitSelPressure MV[127]

-10,000 – 100,000

0.001 – 100,000

Factory setting: 1

RD
AbsFlow_UnitSelAI[19]

Absolute volume flow rate in selected unit as per UnitSelAirFlow MV[121]

 

Status flags: (*4)

 

0 – 500,000

0.01 – 500,000

Factory setting: 1

RD
Sens1AnalogueAI[20]

Sensor 1 as analogue value 
 

If Sensor1Type MV[220] = 2 (active), then display = analogue value in 0 – 10 V.

If Sensor1Type MV[220] = 3 (passive), then display = resistance value.

If RmPCascade MV[10] = 2 (enabled) or 3 (quickly enabled), then the sensor input is not available. 
 

Status flags: (*5)

 

0 – 65535

0.01 – 1000

Factory setting: 1

RD
DeltaP_Pa

AI[29]

Absolute differential pressure in Pa

0 – 600

0.01 – 600

Factory setting: 10

RD
SpRelAO[1]

Relative setpoint value in % 

 

The rel. setpoint value depends on the application (flow rate/pressure/damper blade position).
If SpSource MV[122] = 2 (bus), then SpRel AO[1] = active.
The analogue setpoint value is limited by Min AV[97] and Max AV[98].

 

Status flags: (*1), (*2)

0 – 100

Factory setting: 0

0.01 – 100

Factory setting: 1

C
MinAV[97]

Minimum setpoint value in % (qvmin/Pmin)

 

Requirement:

qvmin/Δpmin < qvmax/Δpmax

qvmin/Δpmin in the range 0 - 100 & qvnom/Δpnom

0 – qvmax/Δpmax

 

0.01 – 100

Factory setting: 1

WR
MaxAV[98]

Maximum setpoint value in % (qvmax/Pmax)

 

Requirement:

qvmax/Δpmax > qvmin/Δpmin

qvmax/Pmax in the range 20 - 100 % of qvnom/Pnom

qvmin/Δp – 100

 

0.01 – 100

Factory setting: 1

WR
Vnom_m3h

AV[112]

Nominal volume flow rate in m³/h

0 – 50,000

0.01 – 50,000

Factory setting: 1

RD
Vnom_UnitSel

AV[119]

Nominal volume flow rate in selected unit as per UnitSel MV[121]

 

0 – 250,000

0.01 – 1,000:

Factory setting: 1

RD
SystemAltitude

AV[120]

System altitude in metres above sea level

0 – 3,000

 

1 – 3,000

Factory setting: 10

WR
DeltaPnom_Pa

AV[122]

Nominal differential pressure in Pa 

 

The nominal differential pressure depends on the selected pressure sensor (D3, M1, M1R).

Depending on the selected application, the nominal differential pressure serves as dp@Vnom or as the maximum pressure limitation

If ApplicationSel MV[2] = 1 (flow control), then display = nominal differential pressure

If ApplicationSel MV[2] = 2 (pressure control) or 3 (room pressure control), then display = max. pressure limitation

 

D3: 0 – 500

M1: 0 – 600

M1R: 0 – 75

1 – 600

Factory setting: 1

RD
DeltaPnom_UnitSel

AV[129]

Nominal differential pressure in selected unit as per UnitSelPressure MV[127]

 

More infos: see AV[122].

 

 

0.01 – 1000

Factory setting: 1

RD
BusWatchdogAV[130]

Time until the release bus timeout monitoring in s 


If BusWatchdog AV[130] ≠ 0, then monitoring of SpRel AO[1] and override MO[1] for change.
If changes in SpRel AO[1] and override MO[1], then reset the bus timeout monitoring. 
If SpSource MV[122] = 1 (analogue), then BusWatchdog AV[130] only takes account of override MO[1].  

0 – 3600 s

Factory setting: 0 (bus timeout monitoring deactivated)

0.01 – 1000

Factory setting: 1

WR
Sens1SwitchBI[20]

Switch status of the switch at the sensor input 

 

If SenType MV[220] = 5 (switch), then Sens1Switch BI[20] = active.

 

Status flags: (*6)

 

 

0: Inactive

1: Active

RD
BusTerminationBI[99]

Terminal resistor 

 

Shows whether the terminal resistor (120 Ω) has been activated via the service tools.

 

0: Deactivated

1: Activated

RD
SummaryStatusBI[101]

Condensed status 


Groups together the status of the objects: 

"StatusSensor" MI[103] 
"StatusFlow" MI[104] 
"StatusActuator" MI[106] 
"StatusPressure" MI[109] 
"StatusDevice" MI[110]  

Not equal to 1: OK

1: Not OK

RD
RmPCasacade

MV [10]

Room pressure cascade 

 

If RmPCascade MV[10] = 2 (active) or 3 (active fast), then sensor1 is the input for the room cascade (0 – 10 V).

If ApplicationSel MV[2] =1 (volume flow control) or 3 (room pressure control), then RmPCascade MV [10] = active.

 

Status flags: (*7)

1: Inactive

2: Active

3: Active fast (for M1R only) 

RD
InternalActivity

MI[100]

Internal status 

 

1: None

2: –

3: Adaption

4: Synchronisation

RD
StatusSensor

MI[103]

Status of the differential pressure sensor 

If status end = automatic reset

1: OK

2: dP sensor not OK

3: dP sensor outside of measuring range

4: dP sensor incorrectly connected

RD
StatusFlow

MI[104]

Volume flow rate status 


If there is no volume flow rate within 600 s, then StatusFlow MI[104] = 3.

1: OK

2: –

3: No airflow detected

RD
StatusActuator

MI[106]

Status of the actuator 

 

Status flags: (*2)

1: OK

2: Actuator cannot be moved

3: Gear release active

4: Mechanical travel exceeded

5: Actuator not suitable for application

 

RD
StatusPressure

MI[109]

Differential pressure status 

 

If the differential pressure is not reached within 180 s, then StatusPressure MI[109] = 3.

1: OK

2: –

3: Pressure not reached

RD
StatusDevice

MI[110]

Status of the device during bus monitoring 


According to BusWatchdog AV[130].

1: OK

2: Bus timeout monitoring activated

RD
Override

MO[1]

Override control 

 

Overwrites the setpoint value with a forced command.

 

Status flags: (*8)

1: None

2: OPEN

3: CLOSED

4: qvmin/Δpmin

5: –

6: qvmax/Δpmax

Factory setting: None (1)

C
ApplicationSel

MV[2]

Display of application 

 

VRU-D3-M/B TR, VRU-M1-M/B TR

- Flow control
- Pressure control
- Flow measurement

 

VRU-M1R-M/B TR
- Room pressure control

 

1: Flow control

2: Pressure control

3: Room pressure control

4: Flow measurement

RD
ControlMode

MV[100]

Control mode

 

Status flags: (*9)

1: PosCtrl

2: FlowCtrl

Factory setting: FlowCtrl

RD
OperationMode

MV[102]

Operating mode 

 

Only relevant for VRU-M1R-BAC.

 

Status flags: (*10)

1: Negative pressure

2: Positive pressure

WR
Command

MV[120]

Release test functions

 

Status flags: (*2)

1: None

2: Adaption

3: –

4: Reset

Factory setting: None 

WR
UnitSelAirFlow

MV[121]

Selection of the volume flow unit 

 

The selected unit is indicated in AI[19] and AV[104]

1: –

2: m³/h

3: l/s

4: –

5: –

6: –

7: cfm

 

WR
SpSource

MV[122]

Selection of the setpoint value setting 

 

If SpSource MV[122] = 1 (analogue), then SpAnalog AI[6] = active.

If SpSource MV[122] = 2 (bus), then SpRel AO [1] = active.

1: Analogue (0 – 10 V, 2 – 10 V)

2: Bus (Modbus, BACnet, MP-Bus)

Factory setting: Analogue

WR
UnitSelPressure

MV[127]

Selection of the pressure unit

 

The selected unit is indicated in DeltaP_UnitSel AI[18] and DeltaPnom_UnitSel AV[129].

1: Pascal

3: Water column

Factory setting: pascal 

WR
UnitSelTemp

MV[128]

Selection of temperature unit

The selected unit is located in AI[20].

1: K

2: °C

3: °F

Factory setting: °C (2)

W
Sens1Type

MV[220]

Definition of the sensor type 

 

If Sens1Type MV[220] = 2 (active) or 3 (passive), then Sens1Analog AI[20] active.

If Sens1Type MV [220] = 5 (switch), then Sens1Schalter BI[20] active. 

 

1: None

2: Active sensor (in hybrid mode)

3: Passive sensor 

4: –

5: Switch

Factory setting: None 

WR

RD = Read-only access
WR = Read/write access
C = Commendable with priority array

Status flags:

(*1) If gear disengagement pressed, then Overridden = 1

(*2) If ApplicationSel MV[2] = 3 (room pressure control) or 4 (flow measurement), then Out of Service = 1

(*3) If SpSource MV[122] = 2 (bus), then Out of Service = 1

(*4) If ApplicationSel MV[2] = 2 (pressure control) or 3 (room pressure control), then Out of Service = 1

(*5) If Sens1Type MV[220] = 1 (none), then Out of Service = 1

(*6) If Sens1Type MV[220] ≠ 5, then Out of Service = 1

(*7) If ApplicationSel MV[2] = 2 (pressure control) or 4 (flow measurement), then Out of Service = 1

(*8) If ApplicationSel MV[2] = 4 (flow measurement), then Out of Service = 1

(*9) If ApplicationSel MV[2] ≠ 1 (flow rate control), then Out of Service = 1

(*10) If ApplicationSel MV[2] ≠ 3 (room pressure control), then Out of Service = 1


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