BUSNF

–

VAV terminal units

static measuring principle, position-independent

1.5 W

2 VA plus connected VST drive

I_max 20 A @ 5 ms

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

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

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

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

Address: 1*,2.3 – 127;

Number of nodes: maximum 32 (without repeater)

Terminating resistor: 120 Ω; integrated, switchable

Required on site: by smartphone app

0 - 10 V DC, 2 - 10 V DC

Input resistance 100 kΩ

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

0.3 kg

5 W

8 VA

2.5 W

10 Nm

120 s/90°

< 20 s/90°

IP 54

2.3 kg

TROX FlowCheck app

PC-Tool ¹

ZTH-EU

R, W ²

R, W ²

R, W ²

R, W ²

R, W ²

yes ³

yes

yes ³

0

Setpoint value between 

q_vmin/Δp_min (reg. address 105) and

q_vmax/Δp_max (reg. address 106)

(*1) (*2) (*3) (*4)

0 – 10,000

Factory setting: 0

%

Override control

Overwrites the setpoint value with override control

0: None

1: OPEN

2: CLOSED

3: q_vmin/Δp_min

5: q_vmax/Δp_max

Factory setting: None

–

Command triggering 

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

0: None

1: Adapting

3: Synchronisation

Factory setting: None 

–

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

–

Current damper blade position acc. to mechanical limits

(*5)

0 – 10,000

%

Blade angle acc. to angle range

(*5)

0 – 9,600

°

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

(*6)

0 – 15,000

%

Absolute volume flow rate

(*6)

0 – q_vnom

m³/h

Sensor value (voltage, resistance, switch)

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

0 – 65,535

mV,

Ω,

0/1

–

–

–

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

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

Analogue setpoint value 

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

0 – 10,000

%

Relative differential pressure 

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

0 – 20,000

%

Absolute differential pressure

-1,000 – 15,000

[Pa]

–

–

–

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

(Low word) < 16 of 32 bit

-10,000,000 – 100,000,000

UnitSel

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

(High word) > 16 of 32 bit

-10,000,000 – 100,000,000 

UnitSel

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

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Serial number, part 1

Example: 00839-31324-064-008

1^st part: 00839

2^st part: 31324

3^st part: 008

–

–

Serial number, part 2

–

–

Serial number, part 3

–

–

Firmware version

Example: 101, version 01.01.

–

–

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

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Setting work areas q_vmin/Δp_min 

Requirements: q_vmin/Δp_min < q_vmax/Δp_max

Vmax in the area 0 – 100 % of q_vnom/Δp_nominal

0 – q_vmax/Δp_max

%

Setting work areas q_vmax/Δp_max 

Requirements: q_vmax/Δp_max < q_vmin/Δp_min

Vmax in the area 20 – 100 % of q_vnom/Δp_nominal

2,000 –10,000  

%

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

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Bus timeout monitoring 

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

The position is mech. limited, q_vmin/Δp_min and q_vmax/Δp_max 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

%

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

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

(Low word) < 16 of 32 bit

0 – 60,000,000

UnitSel

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

(High word) > 16 of 32 bit

0 – 60,000,000

UnitSel

–

–

–

–

–

–

Control mode

0: Position control (open loop)

1: Volume flow control

Factory setting: Volume flow control 

–

Unit selection –

Unit selection for reg. address 11 and 12

0: –

1: m³/h

2: l/s

3: –

4: –

5: –

6: cfm

-

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 

–

Pressure operating mode 

Only for VRU-M1R-M/B TR.

0: Negative pressure

1: Positive pressure

–

–

–

–

–

–

–

–

–

–

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)

–

Applications

0: Volume flow control

1: Pressure control

2: Room pressure control

3: Flow measurement

–

Unit height

0 – 3,000

Factory setting: 0

m

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

–

–

–

Nominal differential pressure in Pa 

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

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

Selection of the pressure unit 

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

0: Pascal

1: –

2: Water column

Factory setting: Pascal 

–

2020-06-11

329

01.02.0001

10.02.0000

12

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)

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)

Device [Inst.No]

0 – 4,194,302

Factory setting: 1

–

Damper blade position in %

Status flags: (*1), (*2)

0 – 100

0.01 – 100

Factory setting: 1

Absolute position in ° 

Angular position corresponding to the entire rotation range.

Status flags: (*1), (*2)

0 – max. angle

0.01 – 90

Factory setting: 1

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

AI[9]

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

0 – 150

0.01 – 150

Factory setting: 1

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

Status flags: (*4)

0 – 150

0.01 – 150

Factory setting: 1

AI[12]

Absolute volume flow rate in m³/h

Status flags: (*4)

0 – 60,000

1 – 60,000

Factory setting: 10

AI[18]

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

-10,000 – 100,000

0.001 – 100,000

Factory setting: 1

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

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

AI[29]

Absolute differential pressure in Pa

0 – 600

0.01 – 600

Factory setting: 10

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

Minimum setpoint value in % (q_vmin/P_min)

Requirement:

q_vmin/Δp_min < q_vmax/Δp_max

q_vmin/Δp_min in the range 0 - 100 & q_vnom/Δp_nom

0 – q_vmax/Δp_max

0.01 – 100

Factory setting: 1

Maximum setpoint value in % (q_vmax/P_max)

Requirement:

q_vmax/Δp_max > q_vmin/Δp_min

q_vmax/P_max in the range 20 - 100 % of q_vnom/P_nom

q_vmin/Δp – 100

0.01 – 100

Factory setting: 1

AV[112]

Nominal volume flow rate in m³/h

0 – 50,000

0.01 – 50,000

Factory setting: 1

AV[119]

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

0 – 250,000

0.01 – 1,000:

Factory setting: 1

AV[120]

System altitude in metres above sea level

0 – 3,000

1 – 3,000

Factory setting: 10

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

AV[129]

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

More infos: see AV[122].

0.01 – 1000

Factory setting: 1

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

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

–

Terminal resistor 

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

0: Deactivated

1: Activated

–

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

–

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) 

–

MI[100]

Internal status 

1: None

2: –

3: Adaption

4: Synchronisation

–

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

–

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

–

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

–

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

–

MI[110]

Status of the device during bus monitoring 

According to BusWatchdog AV[130].

1: OK

2: Bus timeout monitoring activated

–

MO[1]

Override control 

Overwrites the setpoint value with a forced command.

Status flags: (*8)

1: None

2: OPEN

3: CLOSED

4: q_vmin/Δpmin

5: –

6: q_vmax/Δpmax

Factory setting: None (1)

–

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

–

MV[100]

Control mode

Status flags: (*9)

1: PosCtrl

2: FlowCtrl

Factory setting: FlowCtrl

–

MV[102]

Operating mode 

Only relevant for VRU-M1R-BAC.

Status flags: (*10)

1: Negative pressure

2: Positive pressure

–

MV[120]

Release test functions

Status flags: (*2)

1: None

2: Adaption

3: –

4: Reset

Factory setting: None 

–

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

–

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

–

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 

–

MV[128]

Selection of temperature unit

The selected unit is located in AI[20].

1: K

2: °C

3: °F

Factory setting: °C (2)

–

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 

–