Bus interface Modbus RTU
Application
Suitable for X-AIRCONTROL room control, Modbus zone module
By specifying setpoints via the communication interface, the control circuits for e.g. temperature, humidity, air quality control the variable air volume flow
Simple connection for supply voltage and network with one shared RJ12 connection socket
Override controls for activating qvmin, qvmax, shut-off, OPEN are possible using the Modbus register
Control strategy
Operating modes
Communication interface
Parts and characteristics
Construction
Commissioning
Useful additions
Air terminal units control the volume flow in a closed loop, which means: measurement – comparison – adjustment.
The volume flow rate is obtained by measuring a differential pressure. This is done with a differential pressure sensor. The integrated differential pressure transducer converts the differential pressure into a voltage signal. The actual volume flow value is available as a data point. Due to the factory adjustment, 100% always equals the nominal volume flow rate (qvNom).
The volume flow setpoint value is specified by a higher-level controller (e.g. room temperature controller, air quality controller, central BMS). Variable volume flow control can be set between qvmin and qvmax. It is possible to override the room temperature control by forced switching, e.g. for a shut-off
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
TVE | – | D | / | 200 | / | D2 | / | XS0-J6 | / | M | / | qvmin | – | qvmax | m³/h |
| | | | | | | | | | | | | | | | ||||||||
1 | 2 | 5 | 6 | 7 | 8 | 9 | 10 | ||||||||
Type | TVE |
Acoustic cladding | with acoustic cladding |
Material | Galvanised sheet steel |
Nominal size [mm] | 200 |
Accessories | Double lip seal both ends |
Attachment (control components) | Compact controller volumetric flow, static transducer, Modbus RTU interface, display, RJ12 connection socket (for X-AIRCONTROL) |
Operating mode | Modbus RTU interface, variable operation |
Operating values for factory setting | 20 – 350 |
Volume flow rate unit | m³/h |
Compact controllers for VAV terminal units
VAV terminal units | Type of installation component | Part number |
TVE, TVE-Q | TROVM-24T-05I-DS10-MB | A00000069231 |
Compact controller TR0VM-024T-05I-DS10-MB with RJ12 socket
Type of measurement/installation orientation | static measuring principle, position-independent |
Supply voltage (AC) | 24 V AC, ± 20 %, 50/60 Hz |
Supply voltage (DC) | 24 V DC ± 20 % |
Power rating (AC) | TVE NW 100 - 160: maximum 4 VA TVE NW 200 - 400: maximum 7 VA TVE-Q up to height 200: maximum 4 VA TVE-Q from height 300: maximum 7 VA |
Power rating (DC) | TVE NW 100 - 160: maximum 2.5 W TVE NW 200 - 400: maximum 4 W TVE-Q up to height 200: maximum 2.5 W TVE-Q from height 300: maximum 4 W |
Power consumption (when running/when idle) | 1 W |
Run time for 90° | 100 s |
Setpoint value signal input (analogue optional) | 0 - 10 V DC, input resistance > 100 kΩ or 2 - 10V DC Ra> 50 kΩ |
Actual value signal output | 0 - 10 V DC or 2 - 10 V DC; maximum 0.5 mA |
IEC protection class | III (Protective extra-low voltage) |
Protection level | IP 42 (with attached terminal cover) |
EC conformity | EMC to 2014/30/EU |
Bus connection | Modbus RTU, RS485 |
Number of nodes | 128 |
Adjustable communication parameters | 1200 – 115,200 Bd Start bit: 1 Data bits: 8 Stop bits: 1 or 2 Parity: None, Even, Odd |
Setpoint / actual value interface (Modbus) | Via X-AIRCONTROL/Modus register list |
Cable termination | externally required |
Interface configuration of the control component
The communication interface of the control component is preset at the factory for use with the X-AIRCONTROL zone module Modbus. Only the Modbus address must be set by the customer, depending on the use in the supply air and extract air. For other applications, data transmission speed and format must be adapted on site according to the network environment.
XS0-J6 | Setpoint value default setting via: | Actual values via: | corresponds to order key option | Menu configuration (Mode) |
Analogue operation * | analogue 0 - 10 V | analogue 0 - 10 V | V or F | CA0 |
Analogue operation * | analogue 2 - 10 V | analogue 2 - 10 V | V or F | CA2 |
Modbus operation | Modbus register setpoint | Modbus register actual value or analogue 2 - 10 V | M | CB |
* It is not possible to use the analogue interface in combination with the RJ12 connection socket used with the XS0-J6 variant. Therefore, the configuration register (interface mode) must not be changed on site. To use an analogue interface, the XS0 variant is used.
Communication interface Modbus RTU (operating mode M)
Register | Meaning | Access right | Storage |
Volume flow setpoint [%] Reference: Vmin – Vmax (qvmin – qvmax) Resolution: 0 – 10000 Volume flow setpoint: 0.00 - 100.00% | R, W | RAM | |
1 | Activation of an override control; 0 = none; 1 = Open; 2 = Close; 3 = Vmin; 4 = Vmax | R, W | RAM |
2 | Command triggering 0 = none; 1 = adaptation; 2 = test run; 4 = controller reset | R, W | RAM |
4 | Current damper blade position [%] Resolution: 0 – 10000 Damper blade position: 0.00 – 100.00% | R | RAM |
5 | Current damper blade position [°] Reference: without decimal places | R | RAM |
6 | Current actual volume flow [%] Resolution: Vnom Resolution: 0 – 10000 Actual volume flow rate: 0.00 - 100.00% | RAM | |
7 | Actual volume flow rate in volume flow rate unit [m³/h], [l/s], [cfm] according to register 201 | R | RAM |
8 | Voltage at analogue input Y [mV] Note: Connection terminal for analogue input Y not accessible with variant with connection socket | R | RAM |
20 | Volume flow setpoint | R, W | RAM |
103 | Firmware version | R 0.00 – 100.00 % | EEPROM |
104 | Status information (Bit = 1 active; Bit = 0 inactive) Bit 5 mechanical overload Bit 8 internal activity e.g. test run, adaptation Bit 10 bus timeout monitoring triggered | R | RAM |
105 | Operating range limitation: Operating parameter Vmin (qvmin) [%] Resolution: Vnom Resolution: 0 – 10000 Vmin: 0.00 – 100.00% | R, W | EEPROM |
106 | Operating range limitation: Operating parameter Vmax (qvmax) [%] Resolution: Vnom Resolution: 0 – 10000 Vmax: 0.00 – 100.00% | R, W | EEPROM |
108 | Behaviour on bus failure (bus time-out); 0 = nothing; 1 = closed; 2 = open; 3 = qvmin; 5 = qvmax | R, W | EEPROM |
109 | Setting bus time-out [s] | R, W | EEPROM |
120 | Definition of operating range: operating parameters Vmin (qvmin) in volume flow rate unit [m³/h], [l/s], [cfm] according to register 201 | R, W | EEPROM |
121 | Definition of operating range: operating parameters Vmax (qvmax) in volume flow rate unit [m³/h], [l/s], [cfm] according to register 201 | R, W | EEPROM |
122 | Interface definition (Interface mode) For assignment see separate table | R, W | EEPROM |
130 * | Modbus address (device address) | R, W | EEPROM |
201 | Volume flow rate unit 0 = l/s; 1 = m³/h; 6 = cfm | R, W | EEPROM |
231 | Setting of mode: Bit 0 defines the characteristic of the analogue interface. Bit 0 = 0 characteristic: 0 – 10 V Bit 0 = 1 characteristic: 2 – 10 V Bit 4 defines the actual value signal as actual volume flow rate or damper position. Bit 4 = 0 Actual volume flow rate Bit 4 = 1 Damper blade position All other bits must not be changed. | R, W | EEPROM |
233 | Nominal flow rate [m3 /h] (Vnom): | R | EEPROM |
568 | Modbus parameter set, communication settings: baud rate, parity, stop bits, assignment see separate table | R, W | EEPROM |
569 | Modbus communication settings: Modbus Response Time = 10 ms + delay; with delay= 3 ms × register value 0 - 255 | R, W | EEPROM |
* Factory setting: Modbus address 1
R = register readable
R,W = register readable and writable
RAM = register value volatile
EEPROM = register value not volatile, but permanently stored (maximum 1 million write operations)
Note:
All registers from register number 100 onwards with storage in the EEPROM are not designed for cyclical write access, e.g. by the building management system. Cyclic write operations are only permitted on registers with storage in RAM.
Detailed information on register 122 (communication interface setpoint/actual value - interface mode)
Register value | Signal input | Feedback signal |
analogue (0) 2 - 10 V | (0)2 – 10 V | |
2 | Modbus via Register 0 | Register 10 |
1 | Modbus via Register 0 | (0)2 – 10 V |
3 | analogue (0) 2 - 10 V | Register 10 |
Note:
For the control components XM0-J6 and XS0-J6, only register value 2 is useful, as analogue input and analogue feedback signal are not available on the RJ12 connection socket.
Detailed information on register 568 (Modbus communication parameters)
Register value | Display setting value | Baud rate | Parity | Stop bits |
0 | 1 | 1200 | None | 2 |
1 | 2 | 1200 | straight | 1 |
2 | 3 | 1200 | odd | 1 |
3 | 4 | 2400 | None | 2 |
4 | 5 | 2400 | straight | 1 |
5 | 6 | 2400 | odd | 1 |
6 | 7 | 4800 | None | 2 |
7 | 8 | 4800 | straight | 1 |
8 | 9 | 4800 | odd | 1 |
9 | 10 | 9600 | None | 2 |
10 | 11 | 9600 | straight | 1 |
11 | 12 | 9600 | odd | 1 |
12 | 13 | 19200 | None | 2 |
13 | 14 | 19200 | straight | 1 |
14 | 15 | 19200 | odd | 1 |
15 ** | 16 | 38400 | None | 2 |
16 | 17 | 38400 | straight | 1 |
17 | 18 | 38400 | odd | 1 |
18 | 19 | 1200 | None | 1 |
19 | 20 | 2400 | None | 1 |
20 | 21 | 4800 | None | 1 |
21 | 22 | 9600 | None | 1 |
22 | 23 | 19200 | None | 1 |
23 | 24 | 38400 | None | 1 |
24 | 25 | 76800 | None | 1 |
25 | 26 | 115200 | None | 1 |
26 | 27 | 76800 | None | 2 |
27 | 28 | 76800 | straight | 1 |
28 | 29 | 76800 | odd | 1 |
29 | 30 | 115200 | None | 2 |
30 | 31 | 115200 | straight | 1 |
31 | 32 | 115200 | odd | 1 |
** Factory setting: Modbus communication parameters
CommissioningNote on the type of static transducer used
After installation, wiring and connection of the supply voltage
Observe volume flow control ranges
Display functions
Parameter setting
Diagnostic functions
Use and description of the display
Pressing the LED button (< 3 s) selects the next menu item (1) - (6). The selected menu item can be changed by pressing the LED push button for more than 3 s. Changing is done with the rotary selector switch. Pressing the LED push button again (< 3 s) confirms the selected value. If no entry is made for ≥ 60 s, the system returns to menu item 1.
Table 1: Description of the menu items① Flow | Display of actual values or operating states. Setting of the volume flow unit m³/h, l/s, cfm. |
② Vmin | Setting qvmin |
③ Vmax | Setting qvmax |
④ DIAG | Display of control signal and feedback signal alternately in [V], |
⑤ MODE | Selection of the operating mode: |
⑥ COM | Setting the Modbus address: 1 - 247 and the baud rate, parity, stop bits: 1 (b1) - 32 (b32) |
Note on MODE setting:
For the control component XM0-J6 or XS0-J6, only the mode setting CB2 is useful, as setpoint input and actual value return as analogue signal are not available on the RJ12 connection socket of these control components.
Description of status LEDs and error messages
LED flashing signal | Status | Display |
---|---|---|
no power supply connected | ||
Service tool plugged in. | ||
Undervoltage detected. | ||
TROX service technicians provide information. | ||
Drive overload detected (block) * | ||
Synchronisation drive after Power Up * | ||
Test mode enabled * | ||
Overpressure sensor (Overpressure) * | ||
Setpoint or forced control position not yet reached (display changes between e.g. Hi = high and actual value) * | ||
Forced control position reached | ||
Offset: Is signalled as long as the drive does not rotate to readjust the setpoint value * |
Notes:
Share page
Recommend this page
Recommend this page by sending a link by mail.
Share page
Thank you for your recommendation!
Your recommendation has been sent and should arrive shortly.
Contact
We are here for you
Please specify your message and type of request
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265
Contact
Thank you for your message!
Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265
Contact
We are here for you
Please specify your message and type of request
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265
Contact
Thank you for your message!
Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265