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ABB i-bus KNX Product Manual
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ABB i-bus KNX Product Manual

ABB i-bus KNX Product Manual

Fan coil/systemised building technology
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Product manual
ABB i-bus
KNX
Room thermostat
Fan Coil
RTF/A 1.1
Systemised building technology
ABB

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Summary of Contents for ABB i-bus KNX

  • Page 1 ® Product manual ABB i-bus Room thermostat Fan Coil RTF/A 1.1 Systemised building technology...
  • Page 3 It measures the current room temperature (actual value) and sends a c ontinuous correcting variable (0...100%), e.g. to an ABB i-bus® Fan Coil actuator to reach the required room temperature (set value). The RTF/A 1.1 works both in heating mode and in cooling mode.
  • Page 4 O peration For operation and display, the RTF/A 1.1 is equipped with a setting wheel and 5 LEDs for displaying the current fan level. The fan level can also be set manually using the button provided to the right of the LEDs (override mode).
  • Page 5 T echnical data Power supply: Bus voltage Permissible operating temperature: 0°C ...+ 50°C Protective class: Protection: EN 60529: IP 21 Dimensions: HxWxD 80x84x28 (mm) Inputs: Quantity: Contact voltage: 3.3 V provided internally Contact current: 1 mA Maximum cable length:...
  • Page 6 Product range Heating, air conditioning, ventilation Fan coil controller Product type Program name FanCoil operation and control / 1.2 The ETS database can be found on our website: w ww.abb.de / knx U H U P arameter pages 1 0 B...
  • Page 7 C ommunication objects 1 1 B 3.3.1 F eatures of the objects 2 5 B The RTF/A 1.1 has 12 communication objects. Some objects can carry out different functions depending on the parameter settings. Flags Function Object name Type K L S U 2 byte Set required temperature B asic set value...
  • Page 8 Flags Function Object name Type K L S U Send switch telegram Switch input 1 Send ON/OFF telegram Dim E1 On/Off 1 bit Send ON/OFF telegram Dim E1/E2 On/Off EIS1 Slat Blind E1 Step/Stop Slat Blind E1/E2 Step/Stop 1 bit Send up/down telegram Blind E1 up/down EIS1...
  • Page 9 3.3.2 D escription of the objects 2 6 B • Object 0 "Basic set value" / "Manual set value shift" This object can carry out 2 different functions. This means that, depending on the p arameter settings on the setting wheel , either a new set temperature can be specified or the current set temperature can be shifted by a specific value...
  • Page 10 • Object 2 "actual value" This object sends the temperature currently measured by the sensor (if sending is permitted by the parameter settings) • Object 3 "Operating mode preselection" / "Night < - > Standby" The function of this object is dependent on the Objects for setting the operating mode parameter on the parameter page O perating mode Objects for setting the operating...
  • Page 11 • Object 5 "Window position" / "Frost/heat protection" The function of this object is dependent on the Objects for setting the operating mode parameter on the parameter page o perating mode Objects for setting the operating Function of the object mode n ew: Operating mode, presence, Window position:...
  • Page 12 • Objects 9, 10, 11, 12, 13, 14 for the inputs E1, E2 and E3 These objects are available when the interface on the Settings parameter page is activated. Its function is dependent on the parameters Function of E1, Function of E2 and Function of E3 on the relevant parameter pages (inputs E1, E2 and E3).
  • Page 13 3.4.1 S ettings 2 7 B Designation Values Meaning Fixed setting Device type RTF/A 1.1 Specifies whether or not Function of the e xternal none active the external interface is interface used. 3.4.2 S et values 2 8 B Designation Values Meaning Output set value for...
  • Page 14 Designation Values Meaning Feedback of the current set current set value in comfort value via the bus: mode the set value to which the Send actual value temperature is to be (heating < > cooling) controlled should always be sent (= c urrelnt stt value Example with...
  • Page 15 3.4.3 C ooling set values 2 9 B This page only appears if on the parameter page Settings the control function Heating and cooling has been selected (userdefined control). Table 2 Designation Values Meaning Specifies the buffer zone Dead zone between between the set values for heating and cooling heating and in cooling...
  • Page 16 3.4.4 O peration 3 0 B Meaning Designation Values The setting is used to Function of the setting Basic set value for internal specify the b asic setl value wheel controller s et value shifit (please use the following setting wheel) possible via object 0 The setting wheel with...
  • Page 17 Designation Values Meaning Limits the possible setting Max. set value shift on the +/- 1 K, +/- 2 K, +/- 3 K range for the Set value setting wheel +/- 4 K, +/- 5 K, shift function. Applies to the values received via object 0 (manual set value shift).
  • Page 18 Designation Values Meaning The button is deactivated Function of the button: Fan blocked level The fan level can be press continuously selected by pressing a button. The fan coil actuator is changed by a telegram from obj. 17 for an unlimited period into o verride mode As above, but override...
  • Page 19 3.4.5 A ctual value 3 1 B Designation Values Meaning The room temperature is What actual value to use of the internal sensor measured in the device. function of the external sensor* Positive or negative Comparison value for manual input –64 ... 63 correction of the measured internal sensor Default value = 0...
  • Page 20 3.4.6 C ontrol system 3 2 B Designation Values Meaning There is only one water Fan coil system used 2-pipe system circuit which circulates the cooling or heating medium depending on the time of year. The system consists of 2 4-pipe system separate water circuits for heating and cooling.
  • Page 21 Designation Values Meaning After what % change** in Send the heating/cooling with a change of 1 % the control value is the new control value with a change of 2 % value to be sent? with a change of 3 % Small values increase the with a change of 5 % control accuracy, but also...
  • Page 22 Designation Values Meaning Professional setting for Proportional range of the 1 K, 1.5 K, 2 K, 2.5 K, 3 K modifying the controller cooling controller 3.5 K, 4 K, 4.5 K behaviour for the room. 5 K, 5.5 K, 6 K Large values result in less 6.5 K, 7 K, 7.5 K dramatic changes in the...
  • Page 23 3.4.7 O perating mode 3 3 B Designation Values Meaning The RTF/A 1.1 can change Objects for setting the n ew: Operating mode, the operating mode operating mode presence, window status depending on the window and presence contacts. Traditional setting without o ld: Comfort, night, frost window and presence (not recommended)
  • Page 24 Designation Values Meaning Comfort extension via none presence button in night Party button: mode 30 min. this means that the RTF/A 1 hour 1.1 can change back to 1.5 hours comfort mode for a limited 2 hours time from night/frost mode 2.5 hours via the presence object.
  • Page 25 Function of E1 (+ E2): Blind up (down) Briefly press the button: Function of E1 Blind up Step/stop or slat turn (obj. Long button press: Up telegram (obj.12) Briefly press the button: Function of E2 Blind down Step/stop or slat turn (obj. Long button press: Down telegram (obj.12) Function of E1, E2, E3: One-panel blind operation...
  • Page 26 Function of E1, E2, E3: One-panel dimming operation Briefly press the button: Function of E1 One-panel dimming On/off. (or E2, E3) operation The switch status is reversed each time the button is pressed. Long button press: Brighter / darker. The dimming direction is reversed each time the button is pressed.
  • Page 27 A ctuators for heating and cooling control 1 3 B There are several options available for actuating the heating and cooling devices. For more information, see the current ABB i-bus® product overview, chapter 9 "Heating and cooling". C ontrol value display...
  • Page 28 Important: The override control value sent should always be slightly higher than the threshold setting in the fan coil actuator. Example: For actuating the ABB i-bus fan coil actuator LF/A 1.1 Threshold Set values with LFA/S adjusts the value for fan RTF/A 1.1...
  • Page 29 D etermining the current operating mode 1 6 B c urrent set value can be be adjusted for the relevant requirements by selecting the operating mode. The operating mode can be set via objects 3..5. There are two ways of doing this: 5.2.1 N ew operating modes 3 5 B...
  • Page 30 5.2.2 O ld operating modes 3 6 B If Old... has been selected on the operating mode parameter page for the Setting the operating mode parameter, the current operating mode can be set as follows: Night Comfort Frost/heat current operating Object 3 Object 4 protection object 5...
  • Page 31 5.2.3 C alculating the set value 3 7 B 5.2.3.1 S et value calculation in heating operation 5 4 B See also: B asic set value and current set value current set value for heating Operating mode Current set value Comfort B asic set value +/- set value shift...
  • Page 32 5.2.3.2 Set value calculation in cooling mode 5 5 B current set value for cooling Operating Current set value mode Comfort B asic set value + set value shift + dead zone Basic set value + set value shift + dead zone + increase in standby Standby mode Night...
  • Page 33 The amount for the set value shift relative to the b asic set value is sent by object 1 for any change (e.g. -1.00). The limits for the shift are specified on the Operation parameter page using the maximum set value shift on the setting wheel parameter and apply to both types of set value shift.
  • Page 34 5.3.2 S et temperature shift via object 0 3 9 B This option is only available if the following settings have been selected on the Operation parameter page: Parameter page Parameters Setting Operation Function of the setting Basic set value for internal wheel controller blocked, but man.
  • Page 35 E xternal interface 1 8 B The external interface is activated on the Settings parameter page. It consists of the 3 inputs E1, E2 and E3. E1 and E2 are purely binary inputs, E3 can be used both as a binary input and as an analogue input for an external temperature sensor.
  • Page 36 Function of E2 Function Function of E2 Object 11 Object 12 sends the switch status of Switch Not used the E2 input Sends commands for Sends up/down command One-panel blind operation step/stop or slat positioning to blind Sends on/off commands to Sends 4 bit dimming One-panel dimming the dimmer...
  • Page 37 5.4.3 E 1...E2 blind up/down 4 3 B Two buttons are connected to actuate a blind (E1 + E2). Objects 9 (step/stop) and 10 (up/down) are linked in this case using a KNX blind actuator. With both inputs, a distinction is made between a short press and a long press of the button.
  • Page 38 Two buttons are connected to implement a dimmer function. Objects 9 (dimming on/off) and 12 (dimming??? blind??? up/down) must then be connected to ABB I-BUS® KNX DIM ACTUATORS If the Dimming brighter function is selected on E2, the corresponding function, i.e.
  • Page 39 T emperature control 1 9 B 5.5.1 I ntroduction 4 7 B If the RTF/A 1.1 is not configured as a switching controller, it can be parameterised either as a P or as a PI controller, whereby PI regulation is preferable. With the proportional controller (P controller), the control value is modified statically to the control deviation.
  • Page 40 5.5.2 B ehaviour of the P controller 4 8 B Max. 4l/Min. Set value Strip width Actual value Losses 1l/Min If the filling quantity is 15l, a control deviation is produced of 21l – 15l = 6l As our actual value is outside the strip width, the controller will actuate the supply with 100% i.e.
  • Page 41 P controller as temperature controller The P controller behaves in exactly the same way with a heating control as in the previous example. The set temperature (21°C) can never be fully reached. The remaining control deviation becomes higher the greater the heat losses, i.e. the lower the outside temperatures fall.
  • Page 42 G lossary C ontinuous and switching control 2 0 B A switching (2-point) control detects only 2 status conditions; or on off. A continuous control works with a set value between 0% and 100% and can therefore dose the energy supply precisely. This achieves convenient and precise control.
  • Page 43 Once the temperature drops below 20 °C, the system is switched back on again. D ead zone 2 2 B The dead zone is a buffer area between the heating and cooling modes. Within this dead zone, neither heating or cooling is carried out. Without this buffer zone, the system would be permanently changing between heating and cooling.
  • Page 44 On the left is the basic set value which has been specified via object 0 or set on the setting wheel. On the right is the current set value, i.e. the value to which the room temperature is effectively controlled. As shown on the block diagram, the current set value depends on the operating mode (5) and on the control function selected (4).
  • Page 45 6.4.1 S et value calculation 5 3 B Operating mode Comfort - Standby Basic set Manual - Night Heating mode value limits set value Safety Frost shift limits protection Current set Basic set + / - value value Comfort Cooling mode + Standby + dead zone + Night...
  • Page 46 The information provided in this manual are subject to technical modification.