Bus interface Modbus RTU
Application
With heavy dust levels in the room
If the air is contaminated with dust, fluff or sticky particles
Control strategy
Operating modes
Interface
Communication interface
Alternatively
Note
Signal voltage ranges
When using the analogue interface (can be set with service tools)
Parts and characteristics
Operating parameters
Construction
Type LMV-D3-M/B TR for volume flow controllers
Type NMV-D3-M/B TR for volume flow controllers
Type SMV-D3-M/B TR for volume flow controllers
Commissioning
Useful additions
Service tools:
VAV terminal units control the volume flow in a closed loop, i.e. measurement – comparison – correction.
For volume flow rate measurement the effective pressure is measured first. This is done with a differential pressure sensor. The integral differential pressure transducer transforms 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 10 V DC always corresponds to the nominal flow rate (qvnom).
The volume flow rate setpoint value comes from 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 differential pressure setpoint value to the actual value and controls the actuator accordingly if there is a difference.
Category
Application
Supply voltage
Actuator
Installation orientation
Interface/signalling
Connection
Interface information
Special functions
Parameter setting
Factory condition
TVR | – | D | – | P1 | – | / | 200 | / | D2 | / | BM0 | / | V | / | 500 – 1200 [m³/h] | |
| | | | | | | | | | | | | | | | | | ||||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 9 | 11 |
Order example: TVR-D-P1/200/D2/BM0/V/500-1200[m³/h]
Type | TVR |
Acoustic cladding | With acoustic cladding |
Material | Powder-coated RAL 7001 (silver grey) |
Duct connection | Push-fit, suitable for ducts according to EN 1506; with groove for optional lip seal |
Nominal size [mm] | 200 |
Accessories | Double lip seal both ends |
Attachments (control component) | BC0 – Compact controller with dynamic transducer and Modbus RTU, BACnet MS/TP or MP bus interface |
Operating mode | Variable operation |
Operating values for factory setting | 500 – 1200 [m3/h] |
Analogue mode or hybrid mode 0 – 10 V DC or 2 – 10 V DC
The controller is supplied from the factory with operating mode Modbus-RTU. For analogue or hybrid mode, it must be switched over on-site using the ZTH-EU or PC tool. The analogue interface can be adjusted for the signal voltage range 0 – 10V DC or 2 – 10 V DC using PC tool.
The assignment of the volume flow rate setpoint value or actual value for voltage signals is shown in the characteristic curves. In hybrid mode, an analogue control input signal with digital feedback as per the bus interface list is possible.
Analogue hybrid mode
Setpoint value setting
Variable operation
Constant value mode
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 controls via signal input Y
Thanks to appropriate wiring on the signal input Y, the override controls can be activated according to the connection diagrams via wiring with external switch contacts / relays (see wiring examples). OPEN and CLOSED are only available if the controller is supplied with alternating current (AC).
Override control CLOSED via control signal on control signal Y
Override controls in analogue mode via Modbus interface
If the Modbus interface is additionally connected in analogue mode, an override control can also be specified via Modbus register 1.
Override control for diagnostic purposes
Activation via service tools ZTH-EU or PC tool
Prioritisation of various setting options
Compact controllers for VAV terminal units
VAV terminal units | Type of installation component | Part number |
TVR, TZ-Silenzio, TA-Silenzio, TVZ, TVA | LMV-D3-M/B TR | A00000070458 |
TVJ and TVT up to 900 × 400 or 800 × 400 | NMV-D3-M/B TR | A00000070469 |
TVM | 2x LMV-D3-M/B TR | A00000070458 |
TVJ | NMV-D3-M/B TR | A00000070469 |
TVT up to 1000 × 300 or 800 × 400 | NMV-D3-M/B TR | A00000070469 |
TVT from 900 × 400 | SMV-D3-M/B TR | A00000090713 |
Compact controller BM0, LMV-D3-M/B TR
Measurement principle/installation orientation | Dynamic measurement principle, position-independent |
Supply voltage (AC) | 24 V AC, 50/60 Hz |
Supply voltage (DC) | 24 V DC |
Power rating (AC) | 4 VA max. (8 A max. @ 5 ms) |
Power rating (DC) | 2 W max. |
Torque | 5 Nm |
Bus connection | Modbus RTU**, BACnet MS/TP, MP-Bus |
Adjustable communication parameters 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; No. of nodes: up to 32 (without repeater); Terminal resistor: 120 Ω, integral, can be activated |
Adjustable communication parameters BACnet MS/TP | Baud rate: 9600, 19200, 38400**,76800, 115200; Address: 0, 1**, 2, 3 – 127; No. of nodes: up to 32 (without repeater); Terminal resistor: 120 Ω, integral, can be activated |
Addressing | Required on-site: e.g. adjustment device ZTH-EU |
Setpoint value signal input (analogue optional) | 0 – 10 V or 2 – 10 V DC |
Actual value signal output (analogue optional) | 2 – 10 V DC |
Connections | Cable, 6 × 0.75 mm², preassembled |
IEC protection class | III (protective extra-low voltage) |
Protection level | IP 54 |
Functional range | 19.2 – 28.8 V AC or 21.6 – 28.8 V DC |
EC conformity | EMC to 2014/30/EU |
Weight | 0.5 kg |
**Factory setting
Compact controller BM0, NMV-D3-M/B TR
Measurement principle/installation orientation | Dynamic measurement principle, position-independent |
Supply voltage (AC) | 24 V AC, 50/60 Hz |
Supply voltage (DC) | 24 V DC |
Functional range | AC 19.2 – 28.8 V/DC 21.6 – 28.8 V |
Power rating (AC) | 5 VA max. (8 A max. @ 5 ms) |
Power rating (DC) | 3 W max. |
Torque | 10 Nm |
Bus connection | Modbus RTU**, BACnet MS/TP, MP-Bus |
Adjustable communication parameters 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; No. of nodes: up to 32 (without repeater); Terminal resistor: 120 Ω, integral, can be activated |
Adjustable communication parameters BACnet MS/TP | Baud rate: 9600, 19200, 38400**, 76800, 115200; Address: 0, 1**, 2, 3 – 127; No. of nodes: up to 32 (without repeater); Terminal resistor: 120 Ω, integral, can be activated |
Addressing | Required on-site: e.g. adjustment device |
Setpoint value signal input (analogue optional) | 0 – 10 V or 2 – 10 V DC |
Actual value signal output (analogue optional) | 2 – 10 V DC |
Connections | Cable, 6 × 0.75 mm², preassembled |
IEC protection class | III (protective extra-low voltage) |
Protection level | IP 54 |
EC conformity | EMC to 2014/30/EU |
Weight | 0.7 kg |
**Factory setting
Compact controller BM0, SMV-D3-M/B TR
Measurement principle/installation orientation | Dynamic measurement principle, position-independent |
Supply voltage (AC) | 24 V AC, 50/60 Hz |
Supply voltage (DC) | 24 V DC |
Power rating (AC) | 6.5 VA max. (8 A max. @ 5 ms) |
Power rating (DC) | 3.5 W max. |
Torque | 20 Nm |
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; No. of nodes: up to 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: 0,1**,2.3 – 127; No. of nodes: up to 32 (without repeater); Terminal resistor: 120 Ω, integral, can be activated |
Addressing | By others; with an adjustment device, for example |
Setpoint value signal input (analogue as an option) | 0 – 10 V or 2 – 10 V DC |
Actual value signal output (analogue as an option) | 2 – 10 V DC |
Connections | Plug-in cable, 6 × 0.75 mm² |
IEC protection class | III (protective extra-low voltage) |
Protection level | IP 54 |
Functional range | AC 19.2 – 28.8 V/DC 21.6 – 28.8 V |
EC conformity | EMC to 2014/30/EU |
Weight | 0.7 kg |
**Factory setting
Commissioning
Additional commissioning steps
LEDs and operation
Green LED/push button
Yellow LED/push button
Additional functions with Modbus or BACnet:
Service tool range of functions
Function/parameter setting | PC-Tool | ZTH-EU1 |
Setting of qvmin, qvmax | R, W | R, W |
Modbus, BACnet settings (address, communication parameters) | - | R, W |
MP bus settings (address) | R, W | R, W |
Setpoint value default setting via analogue connection or bus (Modbus, BACnet or MP bus) | - | R,W |
Signal voltage range setting 0 – 10 V or 2 – 10 V DC for analogue interface | R, W | R, W |
Note:
R,W = Read and write access
R = Read only
W = Write
- = Function is not available with this service tool.
1minimum version for ZTH-EU Firmware: V 2.09.0004
To ensure flawless use, the service tools should always be kept up to date with the latest software version.
Information on current versions/updates for PC-Tool software and adjustment device ZTH-EU can be found on the Belimo Hompage www.belimo.com.
Modbus RTU communication interface
Number | Register Address | Description | Range Enumeration | Unit | Scaling | Access |
---|---|---|---|---|---|---|
1 | Setpoint value Setpoint value between qvmin and qvmax | 0 – 10000 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 4: qvmid 5: qvmax Factory setting: None (0) | - | - | [R / W] |
3 | 2 | Command triggering - Release of functions for service and test purposes. Reset resets the controller and clears internal error memory such as register 105.
| 0: None 1: Adaptation 2: Test 3: Synchronisation 4: Reset Factory setting: None (0) | - | - | [R / W] |
4 | 3 | Type of actuator | 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] |
5 | 4 | Current damper blade position (%) | 0 – 10000 | % | 0.01 | [R] |
6 | 5 | Damper blade angle (°) | 0 – max. | ° | 1 | [R] |
7 | 6 | Relative volume flow rate related to qvnom | 0 – 10000 | % | 0.01 | [R] |
8 | 7 | Absolute volume flow rate related to qvnom | 0 – qvnom | m³/h
| 1 | [R] |
9 | 8 | Sensor value in mV | 0 – 65353 | mV | 1 | [R] |
10 | 9 | - | - | - | - | [–] |
11 | 10 | Absolute volume flow rate in selected volume flow unit acc. to register 15 (Lowword) | - | UnitSel | 0.0001 | [R] |
12 | 11 | Absolute volume flow rate in selected volume flow unit acc. to register 15 (Highword) | - | UnitSel | 0.0001 | [R] |
13 | 12 | Analogue setpoint value (%). Shows the setpoint value in % with control input signal. | 0 – 10000 | % | 0.01 | [R] |
100 | 99 | Bus terminal resistor. Indicates whether the terminating resistor (120 Ω) is active or deactivated. | 0: Inactive 1: Active Factory setting: inactive (0) | - | - | [R / W*] |
101 | 100 | Serial number, part 1 | - | - | - | [R] |
102 | 101 | Serial number, part 2 | - | - | - | [R] |
103 | 102 | Serial number, part 3 | - | - | - | [R] |
104 | 103 | Firmeware Version. Example: 302, Version 3.02 | - | - | - | [R] |
105 | 104 | Malfunctions and service information | Bit1: Mechanical travel exceeded Bit2: Actuator cannot be moved (e.g. mechanical overload) Bit8: Internal activity (e.g. test run, adaptation) Bit9: Gear release active Bit10: Bus monitoring triggered | - | - | [R] |
106 | 105 | Setting work areas qvmin Requirements qvminvmax Vmax in the area 0 - 100 % qvnom | 0 – qvmax Standard: 0 | % | 0.001 | [R / W*] |
107 | 106 | Setting work areas qvmax Requirements qvmaxvmin Vmax in the area 20 - 100 % qvnom | qvmin –10000 Standard: 10000 | % | 0.01 | [R / W*] |
108 | 107 | Sensor type | 0: None 1: Active sensor (in hybrid mode) 2: - 3: - 4: Switch contact Factory setting: None (0) | - | - | [R / W*] |
109 | 108 | Bus timeout monitoring | 0: Last setpoint value 1: Fast close – CLOSED 2: Quick open – OPEN 3: Center position Factory setting: Last setpoint value (0) | - | - | [R / W*] |
110 | 109 | Time until release bus timeout monitoring | 0 - 3600 seconds Factory setting: 0 (bus timeout monitoring deactivated)
| s | 1 | [R / W*] |
111 | 110 | Nominal volume flow rate [m³/h] | - | m³/h | 1 | [R] |
112 | 111 | - | - | - | - | [–] |
113 | 112 | Nominal volume flow rate in selected volume flow unit acc. to Reg 118 (LowWord) | - | UnitSel | 0.001 | [R] |
114 | 113 | Nominal volume flow rate in selected volume flow unit acc. to 118 (HighWord) | - | UnitSel | 0.001 | [R] |
115 | 114 | - | - | - | - | [–] |
116 | 115 | - | - | - | - | [–] |
117 | 116 | Control mode | 0: Position control (open loop) 1: Volume flow control | - | - | [R / W*] |
118 | 117 | Unit selection | 0: m³/s 1: m³/h 2: l/s 3: l/min 4: l/h 5: gpm 6: cfm Standard m³/h (1) | - | - | [R / W*] |
119 | 118 | Setpoint value setting
| 0: Analogue (0 – 10 V, 2 – 10 V) 1: Bus (Modbus, BACnet, MP-Bus) Factory setting: Bus (1) | - | - | [R / W*] |
R = Read-only access to register
R/W = Read/write access to register
R/W* = Limited read/write access to register
Registers from 100 with write access are persistent (stored in EEPROM), regular or cyclical writing must be avoided.
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
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 |
Communication interface BACnet MS/TP
Object Name | Object Type | Description | Values | COV Increment | Access |
---|---|---|---|---|---|
Device | Device [Inst.No] | 0 – 4194302 | - | W | |
RelPos | AI[1] | Damper blade position in % Overridden = 1 (gear latch pressed) | 0 – 100 | 0.01 – 100 Standard: 1 | R |
AbsPos | AI[2] | Absolute position in ° Overridden = 1 (gear latch pressed) | 0 - max. rotation angle | 0.01 – 65353 Factory setting: 1 | R |
SpAnalogue | AI[6] | Analogue setpoint value in %
Shows the analogue setpoint value in %, if setpoint value setting is in (SpSource[122]) Analogue (1) If setpoint value setting (SpSource[122]) Bus (2) = then Out_Of_Service is TRUE | 0 – 100 | 0.01 – 100 Standard: 1 | R |
RelFlow | AI[10] | Relative volume flow rate in % | 0 – 100 | 0.01 – 100 Standard: 1 | R |
AbsFlow_UnitSel | AI[19] | Absolute volume flow rate of selected unit acc. to [121] | 0 – Vnom | 0.01 – 1000 Standard: 1 | R |
Sens1Analogue | AI[20] | Sensor 1 is an analogue value in mV Analogue value in mV, if Sensor1Type MV[220] is active. If (sensor1type MV[220]) = 2 (not active) or (SpSource MV [122]) = 2 (Bus), Out_of_Service = TRUE | - | 0.01 – 1000 Standard: 1 | R |
SpRel | AO[1] | Relative setpoint value in %
Setpoint value between qvmin AV[97] and qvmax [98] (Only with bus control input signal) If SpSource (MV[122]) = 1 (Analogue), then Out_of_Service = TRUE | 0 – 100 Factory setting: 0 | 0.01 – 100 Factory setting: 1 | C |
Min. | AV[97] | Minimum setpoint value in % (qvmin) Requirement: qvmin < qvmax qvmin in the range 0 - 100 & qvnom | 0 – Vmax Factory setting: 0 | 0.01 – 100 Factory setting: 1 | W |
Max. | AV[98] | Minimum setpoint value in % (qvmax) Requirement: qvmax > qvmin qvmax in the range 20 - 100 % of qvnom | Vmin – 100 Standard: 100 | 0.01 – 100 Standard: 1 | W |
Vnom_UnitSel | AV[104] | Current volume flow rate as per selected volume flow unit (UnitSelFlow MV[121]) | - | 0.01 – 100 Standard: 1 | R |
Bus Watchdog | AV[130] | Time until the release bus timeout monitoring in s
| 0 – 3600 s Factory setting: 0 (bus timeout monitoring deactivated) | 0.01 – 1000 Standard: 1 | W |
Sens1Switch | BI[20] | Switch status of the switch at the sensor input. If SenType MV [122] = 5 (switch) If SensType MV [122] ≠ 5 Out_of_Service = TRUE | Inactive_Text: Switch not active Active_Text: Switch active | - | R |
BusTermination | BI[99] | Terminal resistor
Shows whether the terminal resistor (120 Ω) has been activated via the service tools. | Inactive_Text: Switch not active Active_Text: Switch active | - | R |
SummaryStatus | BI[101] | Condensed status Summary status (MI[106], MI[110]) | Inactive_Text: no error Active_Text: Error | - | R |
InternalActivity | MI[100] | Status Activity
| 1: None 2: Test 3: Adaptation | - | R |
StatusActuator | MI[106] | Status of the actuator | 1: OK 2: Actuator cannot be moved 3: Gear release active 4: Mechanical travel exceeded | - | R |
StatusDevice | MO[110] | Status of the unit Shows the general status of the device | 1: OK 2: Bus timeout monitoring activated | - | R |
Override | MO[1] | Override control Overwrites the setpoint value (SpRel AO[1]) with a forced command. | 1: None 2: OPEN 3: CLOSED 4: qvmin 5: qvmid 6: qvmax Factory setting: None (1) | - | C |
Command | MV[120] | Release test functions | 1: None 2: Adaptation 3: Test 4: Reset Factory setting: None (1) | - | W |
UnitSelFlow | MV[121] | Unit selection The selected unit is indicated in AI[19] and AV[104]. | 1: m³/s 2: m³/h 3: l/s 4: l/min 5: l/h 6: gpm 7: cfm Factory setting: m³/h (2) | - | W |
ControlMode | MV[122] | Setpoint value setting | 1: Analogue (0 – 10 V, 2 – 10 V) 2: Bus (Modbus, BACnet, MP-Bus) Factory setting: Bus (2) | - | W |
ControlMode | MV[223] | ControlMode
| 1: Position control (OponLoop) 2: Volume flow control | - | W |
Sens1Type | MV[220] | Definition of the sensor type for the analogue input | 1: None 2: Active sensor (in hybrid mode) 5: Switch Factory setting: None (1) | - | W |
Bus operation
The controller is supplied from the factory with operating mode Modbus-RTU. The operating mode can be switched to BACnet, MP bus or analogue at any time using the service tool ZTH-EU. For a smooth exchange of data in the bus network provided by others, the communication parameters and the user address for the bus interface are required. The communication parameters for the bus systems (address, baud rate etc.) can be set using the ZTH-EU. The interface provides standardised bus register/object access to the available data points.
Setpoint value default 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 modes are possible: control Pvmin, 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 (BACnet)
If the BACnet communication fails for a specified period, a predefined operating state can be activated.
Override controls for diagnostic purposes
Activation via bus system, external/on-site switch contacts, ZTH-EU or PC software.
Prioritisation of various setting options
Settings for override controls via analogue are prioritised over Modbus/BACnet settings.
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We are here for you
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Thank you for your message!
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Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051