VARIA 826 S KNX Multi-functional display with room thermostat Room thermostat with display VARIA 826 S KNX VARIA 826 S KNX Updated: Sep-14 (Subject to change) 8269210 /8269211 Page 1 of 182
VARIA 826 S KNX Multi-functional display with room thermostat Contents 1 2 Functional characteristics ................................................................................................ 6 1.1 Integrated functions ................................................................................................. 6 1.2 Special features ......................................................................................................... 6 1.3 Operation ...................................
VARIA 826 S KNX Multi-functional display with room thermostat 4.2 Settings menu .......................................................................................................... 89 4.2.1 PIN code ............................................................................................................... 89 4.2.2 Date and time ....................................................................................................... 90 4.2.3 Temperature ..............................................
VARIA 826 S KNX Multi-functional display with room thermostat 5.6 Fan coil actuator control...................................................................................... 122 5.6.1 Devices: .............................................................................................................. 122 5.6.2 Overview ............................................................................................................ 122 5.6.3 Important parameter settings ....................................
VARIA 826 S KNX Multi-functional display with room thermostat 6.10.3 6.10.4 Case 3: Heating with 2-point control and cooling with continuous control... 154 Case 4: Heating and cooling with 2-point control.......................................... 154 6.11 Operating mode selection .................................................................................... 155 6.11.1 Priorities for operating mode selection .......................................................... 155 6.11.
VARIA 826 S KNX Multi-functional display with room thermostat 1 Functional characteristics 1.1 Integrated functions • • • • • • • Room thermostat for heating and cooling operation with additional heating stage. 8 channel time switch: 1 channel for controlling HVAC mode of a room thermostat and 7 free channels. User-friendly switching on of lights via hotkey function Up to 5 freely configurable screens Each screen can display a heading and up to 8 lines of text or functions,→ equivalent to 40 channels.
VARIA 826 S KNX Multi-functional display with room thermostat 1.
VARIA 826 S KNX Multi-functional display with room thermostat 2 Technical data 2.1 Technical data Operating voltage KNX Current consumption KNX bus Installation type Connection type Power reserve Display Display lighting Ambient temperature Protection rating Protection class Updated: Sep-14 (Subject to change) Bus voltage 21..32V DC <= 10mA (without key light) <= 24mA (with 100% key light) Flush-mounted wall installation KNX bus terminal 1.
VARIA 826 S KNX Multi-functional display with room thermostat 3 "Varia 824 / 826 S KNX EIB V1.2" application programme 3.1 Selection in the product database Manufacturer Product family Product type Program name Theben AG Heating, ventilation, air conditioning Controller with display and operating function Varia 82x: RTR with display and operating function. V1.2 This application program was produced for ETS from version 3.0e. The ETS database can be found on our downloads page: www.theben.
VARIA 826 S KNX Multi-functional display with room thermostat 3.2 Communication Objects Table 2: Overview No. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Type & DPT Defining the setpoint 2 byte Base setpoint value temperature 9.001 2 byte Manual setpoint offset Send/receive manual offset 9.002 Adjust setpoint value Outdoor temperature 2 byte compensation 9.002 Adjust setpoint value 2 byte Current setpoint value Report current setpoint value 9.001 2 byte Actual value Send actual value 9.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: No. 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Type & DPT 1 byte Cooling actuating value (%) Send actuating value 5.001 ON/OFF actuating value 1 bit Send actuating value cooling 1.001 Cooling PWM actuating 1 bit Send cooling actuating value value 1.001 Report heating Heating = 0, Cooling = 1 mode/cooling mode 1 bit 1.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: No.
VARIA 826 S KNX Multi-functional display with room thermostat No.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: No.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: No.
VARIA 826 S KNX Multi-functional display with room thermostat 3.2.1 Description of objects • Object 0 "Base setpoint value" The base setpoint value is first specified at start-up and stored in the base setpoint value. It can be reset at any time using object 0 (limited by minimum or maximum valid setpoint value). If the bus supply fails, this object is backed up and the last value is restored when the bus supply returns. The object can be described as required.
VARIA 826 S KNX Multi-functional display with room thermostat Table 4 Format of adjustment value Absolute Relative • Object function Example Transmits the amount: Unadjusted base setpoint value + setpoint correction as setpoint value for additional temperature controls. Calculated setpoint adjustment (in Kelvin) based on outside temperature. Unadjusted base setpoint value = 20ºC. Set point adjustment = +2 K The object transmits: 22 ºC Unadjusted base setpoint value = 20ºC.
VARIA 826 S KNX Multi-functional display with room thermostat • Object 7 "Operating mode preset", "Night <-> standby" The function of this object depends on the objects for setting operating mode parameter on the RTR setting parameter page. Table 5 Objects for determining the operating mode New: Operating mode, presence, window status old: comfort, night, frost Updated: Sep-14 (Subject to change) Object function Here is a 1-byte object. One of 4 operating modes can be directly activated. 0 = Auto i.
VARIA 826 S KNX Multi-functional display with room thermostat • Object 8 "Presence" / "comfort" The function of this object depends on the objects for setting operating mode parameter on the RTR setting parameter page. Table 6 Objects for determining the operating mode New: Operating mode, presence, window status old: comfort, night, frost Updated: Sep-14 (Subject to change) Object function Presence: The status of a presence detector (e.g.
VARIA 826 S KNX Multi-functional display with room thermostat • Object 9 "Window position" / "frost/heat protection" The function of this object depends on the objects for setting operating mode parameter on the RTR setting parameter page. Table 7 Objects for determining the operating mode New: Operating mode, presence, window status old: comfort, night, frost • Object function Window position: The status of a window contact can be received via this object.
VARIA 826 S KNX Multi-functional display with room thermostat • Object 12 "Current operating mode" Transmits the current operating mode as a 1 byte value (see below: Coding of operating modes). The send response can be set on the RTR setting parameter page.
VARIA 826 S KNX Multi-functional display with room thermostat • Object 17 "PWM cooling actuating value" Sends a PWM signal (ON/OFF) that corresponds to the current actuating value. See appendix: PWM cycle. • Object 18 "Report heating/cooling operation", "switch between heating and cooling" The object is available if the cooling function has been selected on the General parameter page (control= heating and cooling).
VARIA 826 S KNX Multi-functional display with room thermostat • Object 21 "Hotkey function" The hotkey function is available on the RTR and on the weather page. Pressing one of the buttons on the right (+, OK or -) triggers the sending of a switching telegram. Pushing the button again reverses the switching status. This function makes it possible to switch room lighting on/off quickly when entering a room without having to first select a specific page.
VARIA 826 S KNX Multi-functional display with room thermostat • Object 24 "send time", "receive time" The function of the object depends on the objects time and date function parameter on the general parameter page. Table 10 Function of time and date objects Receive time and date Send and receive time and date Function Receives time from bus for setting the internal real time clock. Can both receive the time as well as send it to the bus. See object 26. Format: KNX DPT 10.
VARIA 826 S KNX Multi-functional display with room thermostat • Object 27 "Outside temperature" Receives the current outside temperature, e.g. from a weather station (order no. 132 9 201). The received value can appear on the weather display page and is needed as a reference for calculation of the set point value adjustment at high outside temperatures. • Object 28 "Wind speed" Receives the current wind speed, e.g. from a weather station (order no. 132 9 201) for display on the weather page.
VARIA 826 S KNX Multi-functional display with room thermostat • Object 39 "Text in relation to index to day" Parameter: Show weather forecast on page 1 yes no • Receives the relevant forecast day in text form, e.g. Today, tomorrow, the day after tomorrow, day 3. See appendix: Weather forecasts with Meteodata 139. Standard display or operating function (see below: Objects 39, 41...117", "Operate page 1.. 5, line 1..
VARIA 826 S KNX Multi-functional display with room thermostat • Object 45 "Air temperature" Parameter: Show weather forecast on page 1 yes no • Receives the relevant air temperature forecast for the displayed time period in ºC. See appendix: Weather forecasts with Meteodata 139. Standard display or operating function (see below: Objects 39, 41...117", "Operate page 1.. 5, line 1..
VARIA 826 S KNX Multi-functional display with room thermostat • Object 51 "Wind force" Parameter: Show weather forecast on page 1 yes no • Function Receives the relevant wind speed forecast for the displayed time period in km/h. See appendix: Weather forecasts with Meteodata 139. Standard display or operating function (see below: Objects 39, 41...117", "Operate page 1.. 5, line 1..
VARIA 826 S KNX Multi-functional display with room thermostat • Objects 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99, 101, 103, 105, 107, 109, 111, 113, 115, 117 "Display page 1.. 5, line 1.. 8," "Operate page 1.. 5, line 1.. 8" These objects are for controlling text lines 1 to 8 on the customer specific display pages 1 to 5.
VARIA 826 S KNX Multi-functional display with room thermostat • Object 120 "Acoustic signal" Controls the installed buzzer. 1 = On every 2 secs for 100 ms. 0 = Off • Object 121 "Select favourite pages" If a 1 is received, the display changes from VARIA 826 S KNX to the set favourite page. The favourite page is set on the select display pages parameter page. Important:This function is only available with the VARIA 826. S KNX. • Objects 122..128 "Lock time program channel 2..
VARIA 826 S KNX Multi-functional display with room thermostat 3.3 Parameter 3.3.1 Parameter pages Table 14 Name General RTR setting Heating setpoint values Cooling setpoint values Heating control Cooling control Additional stage heating Actual value Fan stages Setpoint shift Time program Channel 1 Time program Channel 2..8 Select screens Description Heating/cooling, language, releases, summer time rule etc. Operating modes, presence detector, fan control etc. Base setpoint value, reductions, offset.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2 Parameter description 3.3.2.1 The General parameter page Table 15 Designation Settings menu on device Values disabled Description Selection of settings menu on device: Operation not possible. enabled Possible at any time Released via PIN Only possible if correct PIN has been entered Determines whether the setpoint values on the device can be set in the Temperature settings menu.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Language after download Function of time and date objects Send time and date Values unchanged Description The language set by the user remains unchanged after download. German English French Italian Spanish Dutch Swedish Reserved for additional language 2 … Reserved for additional language 9 Receive time and date Desired menu language after download.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Summer time rules Activate hotkey function? (Buttons +/- OK page RTR and weather) Values adjustable on device Description The desired summer time rule can be set directly on the device. (Settings menu Date and time). none No summer time changeover required. EU GB/IRL/P USA FIN/GR/TR yes Adjustment to location.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Is mains supply connected? Values Description no, only bus supply obsolete yes Updated: Sep-14 (Subject to change) Page 35 of 182
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Type of presence sensor (to Obj. 8) Values Presence detector Presence buttons Description The presence sensor activates comfort operating mode. Comfort operating mode as long as the presence object is set*. 1. If a new operating mode is received on object 7 with the presence object set (operating mode preset), then it is accepted and the presence object is reset. 2.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Values Time for comfort extension 30 min. 1 hour 1.5 hours 2 hours 2.5 hours 3 hours 3.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Temperature display on RTR page Values Meaning Actual value, setpoint value only The current room temperature is displayed on the RTR page. when operated The setpoint value is revealed by pressing a button. Always setpoint value Updated: Sep-14 (Subject to change) Only displays the setpoint value on the RTR page.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.3 Heating setpoint values parameter page Table 17 Designation Base setpoint value after loading the application minimum valid base setpoint value maximum valid base setpoint value Values 16 °C, 17 °C, 18 °C, 19 °C 20 °C, 21 °C, 22 °C, 23 °C 24 °C, 25 °C, 26 °C, 27 °C 28 °C 10 °C, 11 °C, 12 °C, 13 °C 14 °C, 15 °C, 16 °C, 17 °C 18 °C, 19 °C, 20 °C 20 °C, 21 °C, 22 °C, 23 °C 24 °C, 25 °C, 27 °C, 30 °C 32 °C Reduction in standby mode 0.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Manual offset works Values only in comfort mode with comfort and standby mode with comfort, standby and night mode Current setpoint value in comfort mode Actual value (Heating <>cooling) Meaning In which operating modes can the setpoint value be changed through setpoint value adjustment via object or adjustment on the device (RTR page)? Important:The operatingmode-dependent setpoint values in the device remain uncha
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Send current setpoint value in cycles Values Meaning How often should the currently valid setpoint value be sent? not cyclical, only in the event of Only send in the event of a change. change every 2 min. every 3 min. every 5 min. every 10 min. every 15 min. every 20 min. Every 30 min. every 45 min. every 60 min.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.4 Cooling setpoint values parameter page: Table 18 Designation Dead zone between heating and cooling Values 1 K, 2 K, 3 K 4 K, 5 K, 6 K Increasing in standby mode (during cooling) Increase during night operation (during cooling) Setpoint value for heat protection mode (during cooling) 0.5 K, 1 K, 1.5 K 2 K, 2.5 K, 3 K 3.5 K, 4 K 3 K, 4 K, 5 K 6 K, 7 K, 8 K 42 °C i.e.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation PWM time for cooling ON/OFF Heating Values 2 min. 3 min. 5 min. 10 min. 15 min. 20 min. 30 min. Meaning An actuation cycle consists of a switch-on and a switch-off process and forms a PWM period. Example: Actuating value= 20%, PWM time = 10 min: In an actuating cycle of 10 min, 2 min switched on and 8 min switched off (i.e. 20% on/ 80% off). 2-point control Hysteresis of 2 point control 0.3 K 0.5 K 0.7 K 1K 1.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Integrated time of heating control Proportional band of heating control User-defined parameters pure P control 15 min., 30 min., 45 min. 60 min., 75 min., 90 min. 105 min., 120 min., 135 min. 150 min., 165 min., 180 min. 195 min., 210 min., 225 min. 1 K, 1.5 K, 2 K, 2.5 K 3 K, 3.5 K, 4 K, 4.5 K 5 K, 5.5 K, 6 K, 6.5 K 7 K, 7.5 K, 8 K, 8.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.6 Cooling control parameter page Table 20 Designation Type of control Setting the control parameters Values Continuous control Meaning Infinite control (0 .. 100%). 2 point control Switching control (On/Off). See appendix: Continuous and switching control Important: If this parameter is changed, then all the setpoint values entered on the device will be deleted during download and overwritten with the current ETS values.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Sending the cooling actuating value Values With change of 1 % With change of 2 % With change of 3 % With change of 5 % With change of 7 % With change of 10 % With change of 15 % Sends the cooling control not cyclical, only in the event of variable in cycles change every 2 min. every 3 min. every 5 min. every 10 min. every 15 min. every 20 min. Every 30 min. every 45 min. Every 60 min.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Values Meaning 2-point control Hysteresis of 2 wire control for cooling 0.3 K 0.5 K 0.7 K 1K 1.5 K Recirculation of hysteresis none after switching point 0.1 K/min 0.2 K/min 0.3 K/min Interval between the switchoff point (setpoint value) and the turn back on point (setpoint value – hysteresis). The hysteresis prevents constant switching on/off.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Proportional band of the cooling control Integrated time of the cooling control Values User-defined parameters 1 K, 1.5 K, 2 K, 2.5 K 3 K, 3.5 K, 4 K, 4.5 K 5 K, 5.5 K, 6 K, 6.5 K 7 K, 7.5 K, 8 K, 8.5 K pure P control 15 min., 30 min., 45 min. 60 min., 75 min., 90 min. 105 min., 120 min., 135 min. 150 min., 165 min., 180 min. 195 min., 210 min., 225 min.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.7 Additional heating stage parameter page Table 21 Designation Type of control Values Continuous control Meaning Infinite control (0 .. 100%). 2 point control Switching control (On/Off). See appendix: Continuous and switching control Specifies the negative interval between the current setpoint value and the setpoint value of the additional stage.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Values Meaning 2 point control Hysteresis of 2 point control 0.3 K 0.5 K 0.7 K 1K 1.5 K Recirculation of hysteresis none after switching point 0.1 K/min 0.2 K/min 0.3 K/min Sends the additional heating stage in cycles Interval between the switchoff point (setpoint value) and the turn back on point (setpoint value – hysteresis). The hysteresis prevents constant switching on/off.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.8 Actual value parameter page Table 22 Designation Object function external actual value Values not used Meaning VARIA measures and controls room temperature via the internal sensor. take average with internal actual VARIA takes an average of value the room temperature received from the bus and its own measurements. Control actual value VARIA solely acquires room temperature via the bus.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Values "Actual value malfunction" always cyclically telegram Only report cyclically in the event of malfunction Send "actual value error" Meaning Error status is always sent: 1 = Actual value error 0 = No error Error status is only sent if no actual value has been received during the monitoring period. How often should the error status be sent? every 2 min. every 3 min. every 5 min. every 10 min. every 15 min.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.9 Fan stages parameter page This parameter page is only available if the fan stage control has been activated on the RTR setting parameter page. Table 23 Designation Number of fan stages Value for fan stage 1 Value for fan stage 2 Value for fan stage 3 Values 1 fan stage 2 fan stages 3 fan stages 0% 0.4 %, equivalent to value 1 0.8 %, equivalent to value 2 1.2 %, equivalent to value 3 1.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.10 Setpoint value adjustment parameter page The parameters on this page depend on the setting of the set point value adjustment with high outside temperatures parameter on the RTR setting page. See appendix: Setpoint value adjustment This page is only available if a setpoint value adjustment has been selected on the RTR setting parameter page.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Unadjusted base setpoint value maximum adjustment Values 15 °C, 16 °C, 17 °C 18 °C, 19 °C, 20 °C 21 °C, 22 °C, 23 °C 24 °C, 25 °C, 26 °C, 27 °C, 28 °C, 29 °C, 30 °C unlimited +3 K +5 K +7 K Send all setpoint adjustment not cyclical, only in the event of change every 2 min. every 3 min. every 5 min. every 10 min. every 15 min. every 20 min. every 30 min. every 45 min. every 60 min.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation Designation Select favourites page Values via object only Meaning The favourite page can be selected via object 121. It can, for example, be used as an "alarm page" and selected as required. Via object and after 3 minutes without use The favourite page can be selected via object 121 and is also automatically displayed if the device is not used for more than three minutes.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.12 Weather data parameter page For displaying the current measured values, e.g. from a Theben weather station. Table 27 Designation Temperature unit Values °C Min/max temperature recording yes no Wind unit km/h m/s mph, calculated from m/s km/h, calculated from m/s yes no Min/max wind recording Record rain yes no Resetting min/max values on device Meaning The temperature is displayed in °C.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Display before receipt of value Values Meaning What is displayed if no telegrams have been received and the object, therefore, does not have a defined status? Space The display remains empty. --- Display 3 dashes. according to object value after Reset Displays the value which is allocated the 0 value. Examples: 0 m/s 0.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.1 Parameter page page 1, forecast day. Format of the 1st line: Selected forecast day, today, tomorrow, the day after tomorrow, day 3). Only visible if the Show weather forecast on page 1 parameter is set to yes.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.1 Parameter pages page_1, time interval. Format of the 2nd line: Selected 6 hr time interval, 00:00-06:00, 06:00-12:00 etc. Only visible if the Show weather forecast on page 1 parameter is set to yes.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.1 Parameter pages page_1, weather. Format of the 3rd line: anticipated weather scenario for the selected time interval, sunny, cloudy, etc. Only visible if the Show weather forecast on page 1 parameter is set to yes.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.1 Parameter pages page_1, temperature. Format of the 4th line: Anticipated air temperature for the selected time interval. Only visible if the Show weather forecast on page 1 parameter is set to yes. Table 32 Designation Display before receipt of value Values Meaning What is displayed if no telegrams have been received and the object, therefore, does not have a defined status? Space The display remains empty. --- Display 3 dashes.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.1 Parameter pages page_1, precipitation. Format of the 5th line: Precipitation probability for the selected time interval. Only visible if the Show weather forecast on page 1 parameter is set to yes.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.1 Parameter pages page_1, precipitation amount. Format of the 6th line: Anticipated precipitation amount for the selected time interval. Only visible if the Show weather forecast on page 1 parameter is set to yes. Table 34 Designation Display before receipt of value Values Meaning What is displayed if no telegrams have been received and the object, therefore, does not have a defined status? Space The display remains empty.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.1 Parameter pages page 1, wind force . Format of the 7th line: Anticipated wind speed for the selected time interval. Only visible if the Show weather forecast on page 1 parameter is set to yes. Table 35 Designation Unit for display object Values Text entry: Maximum 3 characters Display before receipt of value Meaning Abbreviation for the wind speed unit: m/s or.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.2 Display objects parameter pages, page 1..5 Table 36 Designation Page heading Favourite line on page Values (22) Manual input no favourite Line 1 Line 2 Line 3 Line 4 Line 5 Line 6 Line 7 Line 8 Updated: Sep-14 (Subject to change) Meaning Customer-specific heading for the relevant page. Maximum text length: 22 characters Determines which line automatically appears as soon as the page is displayed.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.3 Page 1, line 1 to page 5, line 8 parameter pages VARIA has 5 display pages for individual applications. See appendix: Freely programmable display pages. 3.3.2.3.1 Common parameters Table 37 Designation Line format Values entered text Meaning The line should only display one text. (max. 22 characters) and has no other function.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Line format Values Object type: dimming Meaning Dimmer control with 2 objects: Brighter/darker (4 bit) and On/Off Object type: temperature A temperature value can, for example, be sent as a setpoint value for another temperature controller or just the temperature received or displayed via the bus. Object type: EIS 5 A value with commas can be sent or received. Unit used (e.g. °C or m/s etc.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Line format Text for line 1..8 Authorise amendment of object value? Values Object type: show text string Meaning A freely chosen 14-character text (14 byte) can be received and displayed from the bus. Object type: valuator Here, the user can choose from 8 separate predefined values (0..255). Use: e.g. volume control. Object type: floating-point number (DPT 14.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Display before receipt of value Values Corresponding object value after reset Meaning Displays the value which is allocated the 0 value depending on object type. Examples: 0 0.00 off 0% 0.0 °C etc. Read from object via bus Varia sends a read command to the allocated object. The display remains empty if no answer is received.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.3.2 Specific parameters according to object type Important: Certain parameters only become visible when the allow changes to object value? parameter is set to yes. Certain parameters can be faded out or renamed depending on the setting.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Values Percentage value object type Text entry: Maximum 7 characters 1 %, 2 %, , 5 %, 10 % 20 %, 25 %, 33 % 50 % 0 %..100 % Meaning Value range Text to be displayed at 0% value by what % should the value change at each push of the button (+/-) ? Determines the lowest percentage value that can be set 0 %..
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Dimming process is stopped by Unit for display object (3) Increment Lower adjustable threshold value (-20..50 °C) Upper adjustable threshold value (0..50 °C) Values Releasing the button Meaning The dimming value changes as long as the + or – button is pressed or a final value is reached (0% or 100 %). The value reached is retained when the button is released.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Values Unit for display object (3) EIS 5 object type Text entry: Maximum 3 characters Increment Lower adjustable threshold value Upper adjustable threshold value 0.1 0.2 0.5 1 2 5 10 20 50 100 200 500 1000 -99 999…0...99 999 Meaning Abbreviation for the unit that goes with the value, e.g.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation lower adjustable scene number upper adjustable scene number Allocate text to scene number Values 1..64 1..64 no, only display number yes, display text instead of number Name of lower adjustable scene see text list: text 1 ... see text list: text 40 Lowest scene number with 1..64 text Text for this scene number see text list: text 1 ...
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Movement is stopped by Values Object type: Blinds/shutters Releasing the button short use or via OK button Text at "no priority " (6) Text at "priority Off " (6) Text at "priority On" (6) Text adjustment Object type: priority Text entry: Maximum 6 characters Text entry: Maximum 6 characters Text entry: Maximum 6 characters Object type: show text string Flush left 1 character entered flush left 2 characters entered f
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Values Object type: valuator Use which of the following Value 1 only values? Values 1 and 2 Values 1-3 Values 1-4 Values 1-5 Values 1-6 Values 1-7 Values 1-8 Value 1 Manual input 0 ... 255 Meaning This type of valuator allows individually predefined values to be directly selected and sent at the push of a button (+/-). The number of values to be made available is set here.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Values Meaning Object type: floating-point number (DPT 14.xxx) Unit for display object Text entry: Abbreviation for the unit that Maximum 3 characters goes with the value, e.g. pcs Fixed display with 2 decimal points. (From firmware version 064, middle of 2012): When inserting currency ($, EUR, £, CHF, DKK, SEK, NOK, TRY, RUB) the display format is automatically set to 2 decimal places. Value range: -10000.00 .. 10000.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.4 Text list parameter page Table 39 Designation Text 1 … Text 40 (10) Values Text entry: Maximum 10 characters (10) Updated: Sep-14 (Subject to change) Meaning The entered texts can replace values or scene numbers from the page 1..5, lines 1..8 parameter pages.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.5 Time program channel 1 (for RTR) parameter page Table 40 Designation Name of channel Values manual input (max.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Reaction after unlocking Values Operating mode of switching program starts immediately Meaning As soon as the channel is unlocked the RTR takes up the prescribed operating mode from the time program. Operating mode functions after next time program change No reaction when cancelling the lock. These are only taken up by the RTR if the channel switches to another operating mode based on a switching program.
VARIA 826 S KNX Multi-functional display with room thermostat 3.3.2.6 Time program channel 2..8 parameter pages Table 41 Designation Name of channel Values manual input (max. 8 characters) Meaning Input of description for channel (e.g. "light 1") Type of telegrams to be sent. HVAC operating mode The channel can send up to 3 different statuses: comfort, standby and night operation , i.e. stage 1, 2 and 3 (input on device).
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Switching program after download Values Meaning Which program is to be active after downloading? unchanged The program that was active before the download should continue.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Designation Change switching program via user Reaction after unlocking Send time program cyclically (if used) Values disabled enabled Only send status after next change Meaning Can the user change the time program? Only send when the channel status changes. Important: If send cyclically is selected, cyclic sending is only active after next change.
VARIA 826 S KNX Multi-functional display with room thermostat 4 Start-up 4.1 Activate program mode The program mode can be motivated in 2 different ways. Move a magnet along the right upper side of the device Menu Settings System Select Prog Mode and set to active using the + button. The LED on the right upper side of the device lights up and the device can be programmed After the device has been programmed for the first time, the settings menu can be selected without entering the PIN.
VARIA 826 S KNX Multi-functional display with room thermostat 4.2 Settings menu The SETTINGS menu is opened using the menu button. A PIN code may be required depending on configuration. 4.2.1 PIN code If PIN code protection is configured (Parameter page General, settings menu on device = released by PIN), after selecting Menu Settings, the PIN entry PIN 5555 appears in the display and the first space is blacked out. Select the right number using the +/- buttons and confirm with OK.
VARIA 826 S KNX Multi-functional display with room thermostat 4.2.2 Date and time Select the line to be changed with the buttons. Press OK: The value to be changed is blacked out. Use +/- to change the value and move to the next value by pressing OK. 4.2.3 Temperature Individual setpoint values for the different operating modes can be entered here. Room temp If the installation location is unsuitable for measuring room temperature this can be corrected here.
VARIA 826 S KNX Multi-functional display with room thermostat 4.2.4 Time program There are 8 channels (time programs) available. Both customer-specific and preset switching programs can be selected. The programs are weekly programs with a minimum time interval of 15 minutes. Programming is completed on the device. ETS is only used to determine whether and which programs are active. Channel 1 is internally linked to the temperature controller and controls the operation modes.
VARIA 826 S KNX Multi-functional display with room thermostat 4.2.4.1 Time program overview page Set cursor using the buttons to time program and confirm by pressing OK This page is used to display time programs for each channel. time program Channel Channel Channel Channel Channel Channel Channel 1: 2: 3: 4: 5: 6: 7: No prog. Prog. 3 Prog. 1 Own prog. No prog. No prog. No prog. Programs 1-3 are fixed preset programs for heating applications. Fixed means that they cannot be changed.
VARIA 826 S KNX Multi-functional display with room thermostat Table 43: Program options depending on selected type of time program (ETS).
VARIA 826 S KNX Multi-functional display with room thermostat 4.2.4.2 Display, enter or change programs time program Channel Channel Channel Channel Channel Channel Channel 1: 2: 3: 4: 5: 6: 7: Own prog No prog No prog No prog No prog. No prog. No prog. Use the buttons on the overview page to select channel and press OK An overview page appears for the selected channel (except for "no program"). Set the day of the week with the +/- buttons. The associated program is displayed on the screen.
VARIA 826 S KNX Multi-functional display with room thermostat The buttons have new functions in the detailed view. These are shown as symbols on the display next to the relevant buttons. The cursor above the time bar points to the selected 15 minute segment. The up arrow shows the associated status.
VARIA 826 S KNX Multi-functional display with room thermostat Back Type of time program: 3 stage Table 46: Button symbols Button Symbol + Button function Select operating mode: Current cursor function is displayed by the arrow : See next table. Move the program cursor left and program the desired status with the button Move the program cursor right and program the desired status with the Back button Leave detailed view Table 47: Select the cursor functions via the Button button.
VARIA 826 S KNX Multi-functional display with room thermostat Program entry: The symbol is highlighted in black : With the help of the arrow buttons cursor can be moved to the desired position (time) for programming. Select the desired status (or stage) via the Use the the button, which will be highlighted in black. button to move the cursor, the status is accepted. The button can be used at anytime to select another status or the deactivate the selection.
VARIA 826 S KNX Multi-functional display with room thermostat 4.2.6 Display Table 48 Menu item Button sound Button light Description What does a beep signify on pressing the buttons? Should the display backlighting come on for 30 seconds when the buttons are pressed? Controls brightness if display lighting with push of a button. (0-100%) Max. brightness 4.2.7 System Menu item Prog. mode Phys.
VARIA 826 S KNX Multi-functional display with room thermostat 4.3 Freely programmable display pages VARIA has 5 freely programmable display pages with 8 independent, freely programmable lines that can be activated on the select display pages parameter pages (parameter fade in page x for display objects). Display page 1 can be used in conjunction with the weather data receiver Meteodata 139 EFR KNX to display weather forecasts directly.
VARIA 826 S KNX Multi-functional display with room thermostat Table 49: Overview of line formats Line format Entered text Switch on object type Percentage value object type HVAC operating mode object type Parameters Line texts Line texts Text at object value = 0 / 1 Line texts Text at object value 0 Length 22 14 7 14 7 Object type 1 bit KNX 1.001 1 byte KNX 5.001 1 byte KNX 6.010 1 byte KNX 6.
VARIA 826 S KNX Multi-functional display with room thermostat 4.3.1 Operation The value or status can only be changed if the changing the object value parameter is set to yes. Otherwise, values and statuses can only be displayed. Only the amendable lines can be selected using the buttons; the others are missed out. Line format entered text Object type: switch Object type: percentage value Object type: HVAC operating mode Object type: counter value 0..
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: Line format Object type: Blinds/shutters Object type: priority Object type: show text string Object type: valuator Updated: Sep-14 (Subject to change) Permit changing object value parameter yes no Briefly press button: + button = step up or stop + button = step down or stop The reaction if the button is pressed longer depends on setting of the Movement is stopped by stopping the dimmer process.
VARIA 826 S KNX Multi-functional display with room thermostat 4.3.2 Hints on setting up pages The line format = entered text, i.e. pure text line, can prove helpful in different cases, e.g. as an empty line, as a supplementary line or provide assistance to the user: Case 1: A maximum of 4 lines are required per page: A clear and easy to read view can be achieved if functions are only configured for every second line and the remaining ones are configured as empty lines.
VARIA 826 S KNX Multi-functional display with room thermostat Case 3: Display advice for user: A whole page can be used to provide brief operating advice Example: INSTRUCTIONS Page selection: with <> arrow buttons Line selection: with ^v arrow buttons Set values: with the + - ok buttons For easy and clear text entry, see Template at the end of the manual.
VARIA 826 S KNX Multi-functional display with room thermostat 4.3.3 Favourite page The favourite page is set on the select display pages parameter page. It can be selected in 2 different ways: Automatically or via object 121. 4.3.3.1 Favourite page as standard display page The select favourite page parameter on the display page range parameter page is set to: Via object and after 3 minutes not in use. This page is then always displayed again 3 minutes after the last use of the device at the latest. 4.3.
VARIA 826 S KNX Multi-functional display with room thermostat 4.4 Troubleshooting Response Display backlighting flashes*, LCD display is empty. Potential causes Remedy Download was interrupted or 1. Bus voltage interrupted not completed 2. Press down and hold Menu and OK buttons simultaneously. 3. Reconnect bus voltage. 4. Release buttons 5. Download ETS application program again. *only flashes if mains supply available.
VARIA 826 S KNX Multi-functional display with room thermostat 5 Typical applications These typical applications are designed to aid planning. Some individual functions or devices of an overall system are only shown for illustration purposes. Therefore these examples have no claim to completeness and may be adjusted or extended arbitrarily. 5.1 Show weather predictions on the weather forecast page. The weather predictions should be shown on the VARIA forecast page (page 1).
VARIA 826 S KNX Multi-functional display with room thermostat 5.1.2 Overview Figure 1 5.1.3 Objects and links Table 51 No. Meteodata 139 EFR Object name No. VARIA 826 S Object name 177 Text message in relation to index to day 39 Text in relation to index to day 1 Today, tomorrow, the day after tomorrow, day 3 41 Text in relation to index to time 2 00:00-06:00, 06:0012:00 etc. 43 Weather scenario as text 3 Sunny, cloudy, etc.
VARIA 826 S KNX Multi-functional display with room thermostat 5.1.4 Important parameter settings Standard or customer-defined parameter settings apply for unlisted parameters. Table 52: Meteodata 139 EFR Parameter page Weather forecast Parameter User-specific period (from obj. 140) Unit for the sent wind force Setting Select 6 hr period via obj.
VARIA 826 S KNX Multi-functional display with room thermostat 5.2 Display weather data and air quality 5.2.1 Devices: • • • VARIA 826 / 826 S KNX (8269200, 8269210, 8269211) Amun 716 (716 9 200) Weather station (132 9 201 5.2.2 Overview Figure 2 5.2.3 Objects and links Table 54 No. Weather station Object name No.
VARIA 826 S KNX Multi-functional display with room thermostat Table 55 No. Amun 716 Object name No. 0 CO2 value 39 1 relative humidity 41 VARIA Object name Display page 1, line 1 EIS 5 value Display page 1, line 2 percentage value Comment Display on freely programmable pages Display on freely programmable pages 5.2.4 Important parameter settings The standard parameter settings apply for unlisted parameters.
VARIA 826 S KNX Multi-functional display with room thermostat Table 57: Weather station Parameter page Measured values Parameter Send wind speed in the event of a change of Send wind speed in Send wind speed cyclically Send brightness value in the event of a change of Send brightness value cyclically Transmit temperature in the event of change of Send temperature cyclically Send rain in the event of change and Off-delay Setting 20 %, but at least 1 m/s Parameter Send CO2 content on change of Send CO2 c
VARIA 826 S KNX Multi-functional display with room thermostat 5.3 Blinds or shutter / awning control Blinds, shutters or awnings are controlled via line 1 on display page 1 by pressing the +/- buttons. The difference between blinds and shutter control is determined by the configuration of the blinds actuator. 5.3.1 Devices: • • VARIA 826 / 826 S KNX (8269200, 8269210, 8269211) JMG 4 S (Order. no. 491 0 250) 5.3.2 Overview Figure 3 5.3.
VARIA 826 S KNX Multi-functional display with room thermostat 5.3.3.2 JMG 4S Parameter page GM JMG 4S Parameter Type of curtain Setting Blinds or Shutter / awning / general drive 5.3.4 Objects and links Table 60: VARIA No. VARIA Object function No.
VARIA 826 S KNX Multi-functional display with room thermostat 5.4 Conservatory control 5.4.1 Devices: • • • VARIA 826 / 826 S KNX (8269200, 8269210, 8269211) Amun 716 (716 9 200) Weather station (132 9 201) 5.4.
VARIA 826 S KNX Multi-functional display with room thermostat 5.4.3 Objects and links Table 61 No. Weather station Object name No. VARIA Object name Comment 0 Brightness value 29 Brightness Display on the weather page 1 Temperature value 27 Outside temperature Display on the weather page 2 Wind speed 28 Wind speed Display on the weather page 3 Rain sensor 30 Rain Display on the weather page No. Amun 716 Object name No.
VARIA 826 S KNX Multi-functional display with room thermostat 5.4.4 Important parameter settings The standard parameter settings apply for unlisted parameters.
VARIA 826 S KNX Multi-functional display with room thermostat Table 65: Amun 716 Parameter page Measured values Updated: Sep-14 (Subject to change) Parameter Send CO2 content on change of Send CO2 content cyclically Send humidity value in the event of a change of Send humidity value cyclically Setting 200 ppm every 10 minutes 2% every 10 minutes Page 118 of 182
VARIA 826 S KNX Multi-functional display with room thermostat 5.5 Heating control, basic configuration Varia controls a Cheops actuator. A window contact, on a TA 2 binary input sends the window status. 5.5.1 Devices: • • • VARIA 826 / 826 S KNX (8269200, 8269210, 8269211) Cheops drive (Order no. 731 9 200) TA 2 (order no. 496 9 202) 5.5.
VARIA 826 S KNX Multi-functional display with room thermostat 5.5.3 Objects and links Table 66 No. 13 VARIA Object name Heating actuating value % No. Cheops drive Object name Comment 0 Actuating value RTR output actuator Table 67 No. TA 2 Object name No.
VARIA 826 S KNX Multi-functional display with room thermostat 5.5.4 Important parameter settings Standard or customer-defined parameter settings apply to unlisted parameters. 5.5.4.1 Varia Table 68 Parameter page RTR setting Parameter CONTROL Objects for determining the operating mode Setting Heating control only new: operating mode, presence, window status 5.5.4.
VARIA 826 S KNX Multi-functional display with room thermostat 5.6 Fan coil actuator control 5.6.1 Devices: • • • VARIA 826 / 826 S KNX (8269200, 8269210, 8269211) FCA 1 (Order no. 492 0 200) Presence detector (e.g. Theben HTS Eco-IR 180, 360 or Compact Office*) 5.6.
VARIA 826 S KNX Multi-functional display with room thermostat 5.6.3 Important parameter settings The standard parameter settings apply for unlisted parameters. 5.6.3.1 Varia Table 70 Parameter page RTR setting Parameter CONTROL Objects for determining the operating mode Presence sensor type (to Obj.
VARIA 826 S KNX Multi-functional display with room thermostat 5.6.3.3 Presence detector Table 71: Presence detector (e.g. Eco-IR 180, 360 or Compact Office*) Parameter page General data HVAC switch output Parameter Normal or test operation mode HVAC switch output* Response at start/end of HVAC requirement Setting Standard operation Active Transmit On and Off telegram * Presence output 5.6.3.
VARIA 826 S KNX Multi-functional display with room thermostat 5.6.4 Objects and links Table 73: VARIA No. VARIA Object name No.
VARIA 826 S KNX Multi-functional display with room thermostat 5.7 Heating control with 6 heating circuits and window monitoring for caretakers. Combined with 5 RAM 712 Varia controls 6 rooms (rooms 1-6), with window contacts and presence detectors, via a HMT 6 with thermal actuators. In room 1 (monitoring room) the window contacts and the presence sensors are connected to a TA 2. Here, VARIA controls the room temperature and monitors the window status in all rooms.
VARIA 826 S KNX Multi-functional display with room thermostat 5.7.
VARIA 826 S KNX Multi-functional display with room thermostat 5.7.3 Important parameter settings Standard or customer-defined parameter settings apply to unlisted parameters. 5.7.3.
VARIA 826 S KNX Multi-functional display with room thermostat 5.7.3.
VARIA 826 S KNX Multi-functional display with room thermostat 5.7.3.3 RAM 712 Parameter page Settings Parameter Setting CONTROL standard Function of external active interface Operating mode Objects for determining the Operating mode, presence, operating mode window status Presence sensor type Presence buttons (to obj.
VARIA 826 S KNX Multi-functional display with room thermostat 5.7.4 Objects and links Table 78: Varia window status and presence sensor feedback No. Object name No. TA2 room 1 9 0 RAM 712 Room 4 RAM 712 Room 3 RAM 712 Room 2 3 11 11 11 Channel 1 switching Channel 2 switching VARIA Object name Window position Window status for the RTR (frost protection) 1 = window open Window status for display (1 = window open) Central address for all window contacts.
VARIA 826 S KNX Multi-functional display with room thermostat Continuation: RAM 712 Room 6 RAM 712 Room 5 No. Object name VARIA Object name Comment Display page 1, line 5 Window status for display (1 = window open) 121 Select favourites page Central address for all window contacts. 1 = window open = call up display page 1 49 Display page 1, line 6 Window status for display (1 = window open) Select favourites page Central address for all window contacts.
VARIA 826 S KNX Multi-functional display with room thermostat HMT 6 Object name Comment VARIA 13 0 Actuating value channel 1 Control of actuator room 1 RAM 712 Room 2 7 Heating actuating value 1 Actuating value channel 2 Control of actuator room 2 RAM 712 Room 3 7 Heating actuating value 2 Actuating value channel 3 Control of actuator room 3 RAM 712 Room 4 7 Heating actuating value 3 Actuating value channel 4 Control of actuator room 4 RAM 712 Room 5 7 Heating actuating value 4
VARIA 826 S KNX Multi-functional display with room thermostat 6 Appendix 6.1 Weather forecasts with Meteodata 139 EFR KNX Display page 1 can be used in conjunction with the weather data receiver Meteodata 139 EFR KNX to display weather forecasts directly. To do this, the Show weather forecast on page 1 parameter is set to yes. The following weather predictions will be blended in display page 1: Table 81: Preset weather forecast data. Category Validity period Forecast values Notice Comm.
VARIA 826 S KNX Multi-functional display with room thermostat 6.2 Fan forced mode This function enables the manual selection of fan stage on the RTR display page of the device. The fan coil actuator or the fan control is moved into forced mode. Select fan symbol using the arrow buttons and use the +/- buttons to set desired fan stage.
VARIA 826 S KNX Multi-functional display with room thermostat Example: Threshold value for Fan stage 1 2 3 Set values for VARIA Recommended values for FCA 1 20 % 50 % 80 % 10 % 40 % 70 % If fan stage 2 is selected using the button, object 22 sends control variable 50 %. As the threshold value for stage 2 in the fan coil actuator is set at 40 % , the received control variable of 50 % is clearly allocated to fan stage 2 and accepted by the fan.
VARIA 826 S KNX Multi-functional display with room thermostat 6.3 PWM cycle 6.3.1 Basic principle The 50% control variable is converted into switch-on/switch-off cycles in order to achieve a heating output of 50%. The actuator is switched on for 50% of the time and switched off for 50% of the time over a fixed period (10 minutes in our example).
VARIA 826 S KNX Multi-functional display with room thermostat 6.3.2 Response to changes in the control variable Every change in the control variable is immediately transferred to the PWM cycle in order to respond to changes in the quickest possible time. Example 1: The last control variable was 20% (A). A new control variable of 50% is received during the cycle (B). The output is immediately switched on and the missing 30% switch-on time is added The next cycle is executed with 50% (C).
VARIA 826 S KNX Multi-functional display with room thermostat 6.4 Operating mode scene 6.4.1 Principle The current operating mode can be saved with the scene functions and restored later at any time. The current operating mode is allocated to the appropriate scene number when a scene is saved. The previously saved operating mode is reactivated when a scene number is called. This allows VARIA to be easily associated to each chosen user scene. VARIA can participate in up to 16 scenes.
VARIA 826 S KNX Multi-functional display with room thermostat 6.4.3 Calling scenes: The appropriate retrieval code is sent to Object 20 to call a scene. Table 84 Scene no. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Retrieval code Hex. Dec. $00 0 $01 1 $02 2 $03 3 $04 4 $05 5 $06 6 $07 7 $08 8 $09 9 $0A 10 $0B 11 $0C 12 $0D 13 $0E 14 $0F 15 Example: Call operating mode with scene 5: → Send $04 to Obj. 20.
VARIA 826 S KNX Multi-functional display with room thermostat 6.5 Create and display scene telegrams Varia can send and display 1..5 scene telegrams on the user-specific display pages. These can also be sent, if necessary, by a common group address to Object 20 to control the operating mode with scenes (scenes 1-16) See also Operating mode scene and Priorities for operating mode selection. Both access and learning telegram can be sent. All scene numbers from 1 to 64 are possible.
VARIA 826 S KNX Multi-functional display with room thermostat 6.5.1 Allot scene numbers text An up to 10 character long text can be displayed in place of a scene number. Configuration is completed on the page of the relevant line (e.g. page 2, line 1). The texts are entered on the text list parameter page Only the name of the lowest scene needs to be entered for the allocation of text numbers. The following scene numbers are automatically allocated for the subsequent text numbers. 6.5.1.
VARIA 826 S KNX Multi-functional display with room thermostat Only scene numbers 20 to 29 are permitted in the following example. That means the lower adjustable scene number = 20. Texts 5..14 are allocated. Table 88: Scenes 20..29 with texts 5..
VARIA 826 S KNX Multi-functional display with room thermostat 6.6 Setpoint value adjustment The setpoint adjustment enables a dynamic adjustment of the setpoint to the outdoor temperature when cooling. This function prevents too great a temperature deviation between the outside area and the cooled interior with high outside temperatures. If the outdoor temperature exceeds a set threshold, adjustment is activated and a relevant increase of the setpoint is calculated.
VARIA 826 S KNX Multi-functional display with room thermostat 6.6.1 Format of setpoint adjustment: Relative Setpoint adjustment is sent from object 2 as a temperature differential. Under the setpoint adjustment threshold (setpoint adjustment from) the value 0 is sent. If the set point value threshold is exceeded, the set point value is increased each time by 1 K if the outdoor temperature has risen above the configured value (adjustment).
VARIA 826 S KNX Multi-functional display with room thermostat Table 90: Adjustment values Outside temp.
VARIA 826 S KNX Multi-functional display with room thermostat 6.6.2 Format of setpoint adjustment: Absolute Object 2 sends the adjusted setpoint value to the bus for additional room thermostat. This setpoint value consists of: Unadjusted base setpoint + dead zone + adjustment.
VARIA 826 S KNX Multi-functional display with room thermostat Table 91: Setpoint values Outside temp. 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 1K/1K 22.00 22.00 22.00 22.00 22.00 23.00 24.00 25.00 26.00 27.00 28.00 29.00 30.00 31.00 32.00 33.00 34.00 35.00 36.00 37.00 38.00 1K/2K 22.00 22.00 22.00 22.00 22.00 23.00 23.00 24.00 24.00 25.00 25.00 26.00 26.00 27.00 27.00 28.00 28.00 29.00 29.00 30.00 30.00 Updated: Sep-14 (Subject to change) 1K/3K 22.00 22.00 22.00 22.00 22.00 23.
VARIA 826 S KNX Multi-functional display with room thermostat 6.7 Temperature control 6.7.1 Introduction If the VARIA is not configured as a switching controller, it can alternatively be configured as a P or as a PI controller, whereby PI control is preferable. With the proportional control (P control), the control variable is statically adjusted to the control deviation. The proportional integral control (PI controller) is far more flexible, i.e. controls more quickly and more accurately.
VARIA 826 S KNX Multi-functional display with room thermostat 6.7.2 Response of the P-control Max. 4l/Min. 21l Set point value Bandwidth 17l 15l Actual value Losses 1l/Min A filling volume of 15l gives rise to a control deviation of 211 – 151 = 61 As our actual value lies outside the bandwidth, the control will operate the flow rate at 100% i.e. at 4l / minute. The supply quantity (control variable) is calculated from the control deviation (setpoint value – actual value) and the bandwidth.
VARIA 826 S KNX Multi-functional display with room thermostat P-control as temperature control The P-control response during heating control is as shown in the previous example. The setpoint temperature (21°C) can never quite be reached. The permanent control deviation increases as the heat loss increases and decreases as the ambient temperature decreases. 6.7.3 Response of the PI controller Unlike the pure P-control, the PI controller works dynamically.
VARIA 826 S KNX Multi-functional display with room thermostat 6.8 Continuous and switching control A switching (2 point) control recognises only 2 statuses, On or Off. A continuous control works with a control variable between 0% and 100% and can thus exactly measure out the energy input. This achieves a pleasant and precise degree of control.
VARIA 826 S KNX Multi-functional display with room thermostat 6.9.2 Positive hysteresis Heating lasts until the temperature reaches "setpoint value + hysteresis " threshold has been achieved. The heating is only switched on again when the temperature falls below the setpoint value. Heating example: Heating with setpoint value 20°C, hysteresis = 1°C and ambient temperature 19 °C. The heating is switched on and only switches off again when a temperature of 21 ºC (= 20 °C + 1 °C) is achieved.
VARIA 826 S KNX Multi-functional display with room thermostat 6.10.2 Case 2: Heating with 2-point control and cooling with continuous control Cooling setpoint value 25 ºC Heating setpoint value 20 °C DEAD ZONE 4 K Heating hysteresis 1 K The dead zone (4 K) is increased by the value of the hysteresis (1K) and offsets the cooling setpoint value to 25 °C. 6.10.
VARIA 826 S KNX Multi-functional display with room thermostat 6.11 Operating mode selection 6.11.1 Priorities for operating mode selection The operation mode selection between comfort, standby, night operation and frost protection can happen in 4 different ways: • Via object 7 operating mode selection • Manually on device on RTR page • Via the time program • Via scene control All 4 possibilities are all on the same priority level.
VARIA 826 S KNX Multi-functional display with room thermostat 6.11.2 Determining the current operation mode The current setpoint value can be adjusted to the relevant requirements via the choice of operation mode. The operating mode can be specified by objects 7..9. There are two methods available: 6.11.2.1 New operating modes If "objects for determining the operating mode" = new:...
VARIA 826 S KNX Multi-functional display with room thermostat Operating mode guideline via.. Button Object 7 Time prog.* Last command applies Scene Operating mode after download Produces..
VARIA 826 S KNX Multi-functional display with room thermostat 6.11.2.2 Old operating modes If objects for determining the operating mode = old:...
VARIA 826 S KNX Multi-functional display with room thermostat 6.11.2.3 6.11.2.3.
VARIA 826 S KNX Multi-functional display with room thermostat 6.11.2.3.
VARIA 826 S KNX Multi-functional display with room thermostat 6.12 Setpoint offset For VARIA, the current setpoint value can be adjusted in 2 ways. • step by step with the + and – buttons on the RTR page • via Object 1 "Manual setpoint value offset" The differential between the setpoint value offset and the Base setpoint value is sent by object 1 at each change (e.g. -1.00).
VARIA 826 S KNX Multi-functional display with room thermostat 6.12.2 Setpoint temperature offset via object 1 In this case, the setpoint value is changed by sending the desired offset to object 1. This involves the differential to the base setpoint value (may be preceded by a minus sign) being sent to object 1 in EIS5 format. Example Base setpoint value of 21°C: If Obj. 1 receives a value of 2.00, the new setpoint value is calculated as follows: 21°C + 2.00K = 23.00°C.
VARIA 826 S KNX Multi-functional display with room thermostat 6.13 Base setpoint value and current setpoint value The base setpoint value is the standard temperature for the comfort mode and the reference temperature for reduction in standby and night modes. The programmed basic setpoint value (see “Base setpoint value after loading the application”) is stored in Object 0 and can be changed at all times via the bus by sending a new value to Object 0.
6.13.1 Setpoint value calculation Operation mode Comfort - Standby Base setpoint limitations Base setpoint Manual setpoint offset 9 - Night Heating mode Safety limitations Frost prot. Actual setpoint 7 +/- Komfort 1 2 3 4 5 Cooling mode 11 12 + Standby + Dead zone + Night 6 10 Heat prot. 8 1 Specified base setpoint value from Object 0 or user input 2 Max. and min.
6.14 Maximum text length according to line format Max. length 1 2 3 4 5 6 L I V I N G Line texts C O N T R O Line texts C E I L I N Text elements Page heading Object type Entered text Switching 7 8 9 10 11 R O O M L W I G L I S K Y L I G H HVAC Line texts H E A T I N G Line texts C O U N T E R L I G H T E R G H T 17 18 19 20 21 G A R D E N 22 Object type O N 1 bit DPT 1.001 F F T 1 byte DPT 5.001 1 byte DPT 6.
6.15 Template for documentation of use of freely programmable pages. 5 6 7 8 9 10 12 13 14 15 16 17 18 19 20 21 22 User texts 22 14 14 14 14 12 11 12 11 11 20 12 - 11 10 1 2 3 4 5 41 57 73 89 105 1 43 59 75 91 107 2 45 61 77 93 109 3 47 63 79 95 111 4 49 65 81 97 113 5 51 67 83 99 115 6 53 69 85 101 117 7 8 Length 1. 2. 3. 4. 5. 6. 7. Object no.
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