X-AIRCONTROL zone module MP bus
Universal device for use with VAV terminal units
Application
Control strategy
Volume flow rate range in the controller set in the factory
qvmin: minimum volume flow rate
qvmax: maximum volume flow rate
Operating parameters are specified via the order code and set in the factory
Interface
Analogue interface
Digital communication interface (Bus)
Hybrid mode
Factory setting
Operating modes
Variable operation (V)
Constant value mode (F)
Operating parameters
Signal voltage ranges
Parts and characteristics
Construction
BUSS with actuator LMQ24A-VST for:
BUSS with actuator NMQ24A-VST for:
Commissioning
Useful additions
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, 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.
Category
Application
Area of application
Actuator
Installation orientation
Connection
Supply voltage
Interface/signalling
Analogue signal
Bus interface
Interface information
Analogue:
Bus interface:
System connections
MP-Bus for optional extensions
Modbus RTU for optional extensions
Special functions
Parameter setting
Parameters specific to VAV terminal unit set at the factory
Subsequent adjustment
Factory condition
| TVR | – | D | / | 200 | / | D2 | / | BUSS | / | V | 0 | / | qvmin | – | qvmax | m³/h | ||
| | | | | | | | | | | | | | | | | | | ||||||||||
| 1 | 2 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | ||||||||||
P1 Powder-coated RAL 7001, silver grey
A2 Stainless steel construction
4 Duct connection
5 Nominal size [mm]
100, 125, 160, 200, 250, 315, 400
6 Accessories
No entry: none
D2 Double lip seal both sides
G2 Matching flanges for both ends
7 Attachments (control component)
BUSS Universal controller with static transducer and fast-running actuator
8 Operating mode
F Constant value (a setpoint value)
V variable (setpoint value range)
9 Signal voltage range
0 0 – 10 V DC
2 2 – 10 V DC
10 Operating values for factory setting
Volume flow rates in m³/h or l/s
qvconst (only with operating mode F)
qvmin (only with operating mode V)
qvmax (only with operating mode V)
11 Volume flow unit
m³/h
| Acoustic cladding | None |
| Material | galvanised sheet steel |
| Nominal size | 100 mm |
| Accessories | Double lip seal both sides |
| Attachment | VARYCONTROL Universal controller, static transducer |
| Signal voltage range | 0 – 10 V DC |
| Operating values | qvmin= 50 m³/hqvmax = 354 m³/h |
① Adaptation key
② Actuator connection socket
③ NFC interface
④ Dummy cover (not in use)
⑤ Cable glands (separate supply and control)
⑥ Fixing holes
⑦ Connection for effective pressure
① Signal voltage range 0 – 10 V DC
② Signal voltage range 2 – 10 V DC
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
Actual value as feedback for monitoring or tracking control
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.
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.
Override controls for diagnostic purposes
Activation via bus system, external switch contacts / switch contacts provided by others (jumpers), and smartphone app.
Prioritisation of various setting options
Settings for override controls via analogue are prioritised over Modbus/BACnet settings.
Nomenclature
1, 6, 9, 13: ⊥, – = Ground, neutral
2, 10, 14: ~, + = Supply voltage 24 V
3: Y = Setpoint signal Y and override controls
5: U/MP = Actual value signal or MP-Bus or service tool connection
7: D+ = B = C2 = RS-485 bus (BACnet MS/TP or Modbus RTU)
8: D- = A = C1 = RS-485 bus (BACnet MS/TP or Modbus RTU)
11, 12: z1, z2 = Forced control inputs
15: Extension for external sensor
16: Not used
Universal controller for VAV terminal units
– | Controller | Actuator | – | ||
Order code detail | Part number | Type | Part number | Type | VAV terminal units |
| BUSS | A00000073652 | VRU-M1-M/B TR | A00000073644 | LMQ24A-VST TR | ① |
| BUSS | A00000073652 | VRU-M1-M/B TR | A00000073646 | NMQ24A-VST TR | ② |
① TVR, TVZ, TVA, TVRK, nominal sizes 100 – 250
②
Universal controller Type VRU-M1-M/B TR
Measurement principle | Static, independent of the transducer's installation orientation |
Nominal voltage | AC/DC 24 V |
| Nominal frequency | 50/60 Hz |
Functional range | AC 19.2 – 28.8 V/DC 21.6 – 28.8 V |
Power requirement (normal operation/when idle) | 1.5 W |
| Power rating | 2 VA |
| Power rating - note | Imax 20 A @ 5 ms |
| Actuator connection | AC/DC supply from controller, PP link VST drive |
| Bus connection | Modbus RTU*, BACnet MS/TP, MP bus |
| Adjustable communication parameters with Modbus RTU | 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: max. 32 (without repeater) Terminal resistor: 120 Ω; |
| Adjustable communication parameters with BACnet MS/TP | Baud rate: 9600, 19200, 38400*, 76800, 115200; Address: 1*,2.3 – 127; Number of nodes: max. 32 (without repeater) Terminal resistor: 120 Ω; |
| Addressing | By others, with Smartphone app |
| Setpoint value signal input (analogue optional) | 0 – 10 V, 2 – 10 V |
| Actual value signal output | 0 – 10 V, 2 – 10 V, max. 0.5 mA |
| IEC/EN protection class | III (protective extra-low voltage) |
| Protection level | IP 42 |
EMC | CE according to 2014/30/EU |
* Factory setting.
Actuator with fast-running drive LMQ24A-VST TR
| Supply voltage | From the controller |
| Power consumption – when running | 13 W |
| Power rating | 23 VA |
| Self-consumption (idle state) | 2 W |
| Torque | 4 Nm |
| Run time for 90° | 2.5 s/90° |
| Setpoint value signal input | From the controller |
| IEC protection class | III (protective extra-low voltage) |
| Protection level | IP 54 |
EMC | EMC to 2014/30/EU |
| Weight | 0.56 kg |
Actuator with fast-running drive NMQ24A-VST TR
| Supply voltage | From the controller |
| Power consumption – when running | 13 W |
| Power rating | 23 VA |
| Self-consumption (idle state) | 2 W |
| Torque | 8 Nm |
| Run time for 90° | 4 s/90° |
| Setpoint value signal input | From the controller |
| IEC protection class | III (protective extra-low voltage) |
| Protection level | IP 54 |
EMC | EMC to 2014/30/EU |
| Weight | 0.78 kg |
Commissioning
Functional scope of service tools
Function/parameterisation | TROX FlowCheck app | PC-Tool | ZTH-EU |
| Setting qvmin, qvmax | R, W | R, W | R, W |
Actual value signal 0 - 10 V DC, 2 - 10 V DC | R, W | R, W | – |
| Setpoint value setting analogue, Bus | R, W | R, W | – |
| Modbus, BACnet | R, W | R, W | – |
| MP bus | R, W | R, W | – |
| Set bus parameters | R, W | R, W | – |
| Carry out override controls | No | No | No |
| Trend display | Yes | Yes | – |
R,W = Function can be read and written.
- = Function is not available for the service tool.
Communication interface Modbus RTU
| Number | Register Address | Description | Range Enumeration | Unit | Scaling | Access |
|---|---|---|---|---|---|---|
| 1 | Setpoint value between qvmin/Δpmin (reg. address 105) and qvmax/Δpmax (reg. address 106) | 0 – 10,000 Factory setting: 0 | % | 0.01 | [R / W] | |
| 2 | 1 | Override control
Overwrites the setpoint value with override control | 0: None 1: OPEN 2: CLOSED 3: qvmin/Δpmin 5: qvmax/Δpmax Factory setting: None | – | – | WR |
| 3 | 2 | Command triggering
Triggering of functions for service and test purposes. Command ends automatically with 0
| 0: None 1: Adapting 3: Synchronisation Factory setting: None | – | – | WR |
| 4 | 3 | 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 | – | – | RD |
| 5 | 4 | Current damper blade position acc. to mechanical limits
(*5) | 0 – 10,000 | % | 0.01 | RD |
| 6 | 5 | Blade angle acc. to angle range
(*5) | 0 – 9,600 | ° | 0.01 | RD |
| 7 | 6 | Relative volume flow rate related to qvnom (reg. address 110)
(*6) | 0 – 15,000 | % | 0.01 | RD |
| 8 | 7 | Absolute volume flow rate
(*6) | 0 – qvnom | m³/h
| 1 | RD |
| 9 | 8 | 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 | RD |
| 10 | 9 | – | – | – | - | [–] |
| 11 | 10 | 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 | RD |
| 12 | 11 | 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 | RD |
| 13 | 12 | 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 | RD |
| 51 | 50 | Relative differential pressure
According to application case as per (reg. address 128) | 0 – 20,000 | % | 0.01 | RD |
| 52 | 51 | Absolute differential pressure | -1,000 – 15,000 | [Pa] | 0.1 | RD |
| 53 | 52 | – | – | – | – | [–] |
| 54 | 53 | Absolute differential pressure in selected unit (reg. address 145) (Low word) < 16 of 32 bit | -10,000,000 – 100,000,000 | UnitSel | 0.001 | RD |
| 55 | 54 | 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 | RD |
| 100 | 99 | 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 | – | – | RD |
| 101 | 100 | Serial number, part 1 Example: 00839-31324-064-008 1st part: 00839 2st part: 31324 3st part: 008 | – | – | – | RD |
| 102 | 101 | Serial number, part 2 | – | – | – | RD |
| 103 | 102 | Serial number, part 3 | – | – | – | RD |
| 104 | 103 | Firmware version Example: 101, version 01.01. | – | – | – | RD |
| 105 | 104 | 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 | – | – | RD |
| 106 | 105 | Setting work areas qvmin/Δpmin
Requirements: qvmin/Δpmin < qvmax/Δpmax Vmax in the area 0 – 100 % of qvnom/Δpnominal | 0 – qvmax/Δpmax
| % | 0.01 | WR |
| 107 | 106 | 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 | WR |
| 108 | 107 | 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 | – | – | WR |
| 109 | 108 | 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 | WR |
| 110 | 109 | 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 | WR |
| 113 | 112 | 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 | RD |
| 114 | 113 | 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 | RD |
| 115 | 114 | – | – | – | – | [–] |
| 116 | 115 | – | – | – | – | [–] |
| 117 | 116 | Control mode | 0: Position control (open loop) 1: Volume flow control Factory setting: Volume flow control | – | – | [R] |
| 118 | 117 | Unit selection –
Unit selection for reg. address 11 and 12 | 0: – 1: m³/h 2: l/s 3: – 4: – 5: – 6: cfm | - | – | WR |
| 119 | 118 | 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 | – | – | WR |
| 120 | 119 | Pressure operating mode
Only for VRU-M1R-M/B TR. | 0: Negative pressure 1: Positive pressure
| – | – | WR |
| 121 | 120 | – |
– | – | – | [–] |
| 122 | 121 | – | – | – | – | [–] |
| 123 | 122 | – | – | – | – | [–] |
| 124 | 123 | 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) | – | – | RD |
| 125 | 124 | Applications
| 0: Volume flow control 1: Pressure control 2: Room pressure control 3: Flow measurement | – | – | RD |
| 126 | 125 | Unit height | 0 – 3,000 Factory setting: 0 | m | 1 | WR |
| 127 | 126 | 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 | – | RD |
| 128 | 127 | – | – | – | – | [–] |
| 129 | 128 | 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 | RD |
| 146 | 145 | Selection of the pressure unit
The selected unit is displayed in (reg. address 126). | 0: Pascal 1: – 2: Water column Factory setting: Pascal | – | – | [–] |
RD = Register can only be read
WR = Register can be read and written
(*1) If reg. address 118 = 1 (Bus), then reg. address 0 = active.
(*2) If reg. address 124 = 0 (volume flow control), then reg. address 0 = volume flow rate
(*3) If reg. address 124 = 0 (volume flow control) and reg. address 116 = 0 (position control), then reg. address = damper blade position
(*4) If reg. address 124 = 1 (differential pressure control) or 2 (room pressure control), then reg. address = pressure
(*5) If reg. address 124 = 2 (room pressure control) or 3 (volume flow rate measurement), then reg. address = deactivate 65535
(*6) If reg. address 124 = 1 (differential pressure control) or 2 (room pressure control), then reg. address = deactivate 65535
Protocol Implementation Conformance Statement – PICS (general information)
| Date | 2020-06-11 |
| Vendor name | TROX GmbH |
| Vendor ID | 329 |
| Product name | VRU-D3-BAC, VRU-M1-BAC, VRU-M1R-BAC |
| Product model number | VRU – BAC |
| Application software version | 01.02.0001 |
| Firmware revision | 10.02.0000 |
| BACnet Protocol Revision | 12 |
| Product description | Controller for VAV/CAV and pressure applications |
| BACnet Standard Device Profile | BACnet Application Specific Controller (B-ASC) |
| BACnet Interoperability Building Blocks Supported | Data Sharing – ReadProperty-B (DS-RP-B) |
| Segmentation Capability | No |
| Data Link Layer Options | MS/TP master, baud rates: 9600, 19200, 38400, 76800, 115200 |
| Device Address Binding | No static device binding supported |
| Networking Options | None |
| Character Sets Supported | ISO 10646 (UTF-8) |
| Gateway Options | None |
| Network Security Options | Non-secure device |
Object processing
Object type | Optional properties | Writeable properties |
Analogue input [AI] | Description | COV Increment |
Analogue Output [AO] | Description | Present Value |
Analogue Value [AV] | Description COV Increment | Present Value COV Increment |
Binary Input [BI] | Description | |
Device | Description | Object Identifier |
Multi-state Input [MI] | Description | |
Multi-state Output [MO] | Description | Present Value |
Multi-state Value [MV] | Description | Present Value (if marked) |
Processing of services
Communication interface BACnet MS/TP
| Object Name | Object Type | Description | Values | COV Increment | Access |
|---|---|---|---|---|---|
| Device | Device [Inst.No] | 0 – 4,194,302 Factory setting: 1 | – | WR | |
| RelPos | AI[1] | Damper blade position in %
Status flags: (*1), (*2) | 0 – 100 | 0.01 – 100 Factory setting: 1 | RD |
| AbsPos | AI[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 |
| SpAnalogue | AI[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].
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 |
| RelFlow | AI[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_UnitSel | AI[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 |
| Sens1Analogue | AI[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 |
| SpRel | AO[1] | Relative setpoint value in %
The rel. setpoint value depends on the application (flow rate/pressure/damper blade position).
Status flags: (*1), (*2) | 0 – 100 Factory setting: 0 | 0.01 – 100 Factory setting: 1 | C |
| Min | AV[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 |
| Max | AV[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 | |
| BusWatchdog | AV[130] | Time until the release bus timeout monitoring in s
| 0 – 3600 s Factory setting: 0 (bus timeout monitoring deactivated) | 0.01 – 1000 Factory setting: 1 | WR |
| Sens1Switch | BI[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 |
| BusTermination | BI[99] | Terminal resistor
Shows whether the terminal resistor (120 Ω) has been activated via the service tools.
| 0: Deactivated 1: Activated | – | RD |
| SummaryStatus | BI[101] | Condensed status
| 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 | 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
| 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
| 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
VRU-M1R-M/B TR
| 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 = Register can only be read
WR = Register can be read and written
C = Commendable with priority array
Status flags:
(*1) If the gear latch is 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 (volume flow control), then Out of Service = 1
(*10) If ApplicationSel MV[2] ≠ 3 (room pressure control), then Out of Service = 1
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