theben Continuous valve actuator CHEOPS control Continuous valve actuator CHEOPS control incl.
Continuous valve actuator CHEOPS control theben Contents 1 2 3 4 5 Functional characteristics ................................................................................................... 4 1.1 Operation .................................................................................................................... 5 1.2 Benefits of Cheops Control ........................................................................................ 6 1.2.1 Special features ................................
Continuous valve actuator CHEOPS control theben 5.3.2 Input E1 ................................................................................................................ 52 5.3.3 Input E2 ................................................................................................................ 53 5.4 Monitoring the actual value...................................................................................... 54 5.4.1 Application .............................................................
Continuous valve actuator CHEOPS control theben 1 Functional characteristics The Cheops control drive actuator is both a continuous EIB room temperature controller and an actuator, i.e. Cheops control measures the current room temperature (actual value) and controls the radiator valve, in order to achieve the desired room temperature (set point value). The valve position can be transferred on the bus.
Continuous valve actuator CHEOPS control theben 1.1 Operation For operation and display functions, Cheops control is fitted with 5 LEDs, a blue and a red button. The top 3 LEDs are red, the bottom 2 LEDs are blue. The LEDs show the set point temperature, i.e. the desired room temperature. The middle LED illuminates when the temperature determined by the Basic set point value has been reached. The 2 buttons can be used to adapt the set point value to suit the individual requirements of the room user.
Continuous valve actuator CHEOPS control theben 1.
Continuous valve actuator CHEOPS control theben 1.3 Hardware versions There are 2 hardware versions of Cheops, up to 2008 and from 2008, with some different features. The version up to 2008 (left) has two circuit boards mounted at right-angles to each other. The version from 2008 (right) only has one circuit board. The different features of the two versions are indicated in this manual by "up to 2008" and "from 2008".
Continuous valve actuator CHEOPS control theben 1.4 Differences Devices up to 2008 • • • • • • Only one calibration strategy The former positions are adopted after reset (small calibration) Valve protection every 24 hours if there is no change in actuating value. Site function always active (25% after adjustment) Error code in $1FB Continuous light with known errors From 2008: Version V 44 • • • • • • New calibration strategy: End position via force with fixed stroke.
Continuous valve actuator CHEOPS control theben 2 Technical data 2.1 General Voltage supply: Bus voltage Permitted working temperature: 0°C ...+ 50°C Runtime: < 20s / mm Controlling torque: > 120 N Max. control stroke: 7.
Continuous valve actuator CHEOPS control theben 3 The "CHEOPS control V1.2" Application Program 3.1 Selection in the product database Manufacturer Product family Product type Program name Theben AG Valve actuators Valve actuator with controller Cheops control V1.2 Download the application from: http://www.theben.de 3.
Continuous valve actuator CHEOPS control theben 3.3 Communication objects 3.3.1 Object characteristics Cheops control features 12 communication objects. Objects 2, 3, 4, 5, 6 and 8 can assume various functions, depending on the configuration Table 3 No.
Continuous valve actuator CHEOPS control theben 3.3.2 Object description • Object 0 "Basic set point value" The Basic set point value is first specified via the application at start-up and stored in the "Basic set point value" object. It can then be re-specified at any time via Object 0. If the bus voltage fails, this object is backed up and the last value is restored when the bus voltage returns.
Continuous valve actuator CHEOPS control • theben Object 3 "Pre-selection of operating mode" / "Night <-> Standby" The function of this object depends on the "Objects for determining operating mode" parameter on the "Operating mode" parameter page. Table 5 Objects for determining the operating mode New: Operating mode, presence window, window status Old: Comfort, night, frost Function With this setting, the object is a 1 byte object. One of 4 operating modes can be directly activated.
Continuous valve actuator CHEOPS control • theben Object 5 "Window state" / "Frost/heat protection" The function of this object depends on the "Objects for determining operating mode" parameter on the "Operating mode" parameter page. Table 7 Objects for determining the operating mode New: Operating mode, presence window, window status Old: Comfort, night, frost • Function The status of a window contact can be received via this object.
Continuous valve actuator CHEOPS control Continued: Function of Object 6 Determine the maximum actuating value Sends the actual valve position • theben Function This object has 2 functions here: 1. Receives actuating values from the other actuators (other rooms), in order to be able to compare them with its own. 2. Sends its own actuating value to the heating boiler, if it is higher than the others. (See also: Determining maximum actuating value) Sends the current valve position (0..100%).
Continuous valve actuator CHEOPS control theben Note: In the "Heating control" setting, the object is not available because neither the cooling function nor the additional step are present. If you wish to read out Object 8 via the bus, Object 7 must be hidden (see above) and the "Read" flag must be set. • Object 9 "Current set point value" This object sends the Current set point temperature as a EIS 5 telegram (2 bytes) on the bus. The send response can be set on the "Heating control" parameter page.
Continuous valve actuator CHEOPS control theben 3.4 Parameters 3.4.1 Settings Table 11 Designation Control Values Standard Meaning For simple applications User-defined For specific setting of the control parameters and special applications such as heating/cooling or 2nd heating step.
Continuous valve actuator CHEOPS control Continued: Designation Device settings Function of external interface theben Values Standard Meaning Default settings User-defined Opens the parameter page Device settings Specifies whether the external interface is occupied by window presence contact or an external temperature sensor is connected. Note: IF E2 is declared as actual value input, the "Input for actual value" selection cannot be changed on the "Actual value" parameter page.
Continuous valve actuator CHEOPS control theben 3.4.2 Set point values Table 12 Designation Basic set point value after download of application Reduction in standby operating mode at heating Values 18 °C, 19 °C, 20 °C, 21 °C, 22 °C, 23 °C, 24 °C, 25 °C 0,5 K, 1 K, 1,5 K 2 K, 2.
Continuous valve actuator CHEOPS control theben Continued: Designation Values Meaning Parameters for heating / cooling operation Dead zone between heating 1 K, 1,5 K, 2 K, Specifies the interval between and cooling 2,5 K, 3 K, 3,5 K set point value in heating and 4 K, 4,5 K, 5,5 K cooling operations. 6K Example with set point value of 21°C and Dead zone of 2K: Cheops will only start cooling when the temperature ≥ Set point value + Dead zone is, i.e. 21°C + 2K = 23°C.
Continuous valve actuator CHEOPS control Continued: Designation Current set point value in comfort mode Differential between main step and additional step Values theben Meaning Feedback of current set point value via the bus: Transmit mean value between Same value in comfort heating and cooling operation mode during both heating and cooling operation, i.e.: Basic set point value + half dead zone sent, to prevent room users becoming irritated.
Continuous valve actuator CHEOPS control theben 3.4.3 Actual value Table 13 Designation Input of actual value Values Meaning Cheops control can obtain its actual value from three sources. Selection can be made from 2 such sources: Internal sensor object Actual value fitted sensor bus (Object 2). Temperature offset for internal sensor (in 0,1K, -64...63) Manual input -64.. 63 Transmission of actual value at change Does not send by 0,2 K, 0,3 K by 0.5 K, 0.7 K by 1 K, 1.
Continuous valve actuator CHEOPS control Continued: Designation Transmission of actual value Temperature offset for external sensor (in 0.1K, 64...63) Position in case of failure of actual value or sensor theben Values no cyclical transmission 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 Parameters for external sensors Manual input -64..
Continuous valve actuator CHEOPS control theben 3.4.4 Heating control Table 14 Designation Setting of control parameters Values Via type of system Meaning Standard application User-defined Prof.
Continuous valve actuator CHEOPS control Continued: Designation Transmission of actuating value heating Proportional band of heating control Integral action time constant of heating controller theben Values no cyclical transmission 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 User-defined parameters 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.
Continuous valve actuator CHEOPS control theben 3.4.5 Cooling control Table 15 Designation Setting of control parameters Values Via type of system Meaning Standard application User-defined Prof.
Continuous valve actuator CHEOPS control Continued: Designation Integral time of the cooling controller theben Values Pure P control Meaning see Appendix Temperature control 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 For PI control only: The integrated time determines the reaction time of the control. These times can be adapted to suit particular circumstances.
Continuous valve actuator CHEOPS control theben 3.4.6 Additional heating step See also Appendix: 2-step heating Table 16 Designation Hysteresis Values 0,3 K 0,5 K 0,7 K 1K 1.5 K Feedback of hysteresis controlled with switch point None 0,1 K/min 0,2 K/min 0.
Continuous valve actuator CHEOPS control theben Continued: Designation Values Meaning Parameters for continuous additional step Proportional band of 2 K, 2,5 K, 3 K Prof. setting to adapt the additional heating system 3,5 K, 4 K, 4,5 K control response to the room. 5 K, 5,5 K, 6 K Large values cause finer 6.5 K, 7 K, 7.5 K changes to the actuating 8 K, 8.5 K values with the same control deviation and a more precise control than smaller values.
Continuous valve actuator CHEOPS control theben 3.4.7 Operation Table 17 Designation Function of LEDs Values None Meaning The LEDs are always off Indication of set point value The middle LED illuminates if no offset has been entered. shift The remainder indicate an upward or downward offset increment Fixed indication of position Time-limited display of set point val.
Continuous valve actuator CHEOPS control Continued: Designation Maximum shift of set point value theben Values +/-1 K (1 push button stroke corresponds to 0,5 K) Meaning What is the max. amount by which the the set point value can be changed and how large +/-2 K (1 push button stroke is the change at each increment/key pressure? corresponds to 1,0 K) +/-3 K (1 push button stroke corresponds to 1,5 K) +/-4 K (1 push button stroke corresponds to 2,0 K) +/-5 K (1 push button stroke corresponds to 2.
Continuous valve actuator CHEOPS control theben 3.4.8 Operating mode Table 18 Designation Objects to select operating mode Operating mode after download of application Values New: Operating mode, presence, window state Meaning Cheops control can also respond to window and presence contact. Old: Comfort, night, frost Frost protection Night reduction Standby Comfort Conventional setting Operating mode after start-up, re-programming or return of bus voltage Type of presence sensor (on Obj. 4 or Ext.
Continuous valve actuator CHEOPS control Continued: Designation Transmission of current operating mode Values No cyclical transmission 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 As of: Jul-11 (Subject to change without notice) theben Meaning How often should the current operating mode be sent? Page 33 of 71
Continuous valve actuator CHEOPS control theben 3.4.9 Device settings Table 19 Designation Values Direction of control action Normal (closed with pushed of valve tappet) Inverted, (open with pushed tappet) Meaning For all standard valves Strategy for identifying valve Standard Standard identification for most valve models. Automatic Only for devices from software V63. Adjustment to inverted valves The valve is closed with a pre-defined force (see below, "Closing force for" parameter).
Continuous valve actuator CHEOPS control Continuation: Designation Values theben Application Strategy = Standard Additional pressing of rubber seal in 1/100mm 0..79 (Default = 20) The set value determines the additional pressing in 1/100 mm. This allows the valve to be further closed by a set path if, due to the characteristics of the rubber seal, it fails to close completely. Caution: In order to avoid seal damage, the value should be increased by max. 10 increments.
Continuous valve actuator CHEOPS control Continuation: Designation Type of valve seal Characteristic curve of valve Designation Valve protection* Values Valve with Standard seal Valve with hard seal Valve with soft seal Valve with medium-soft seal Typical characteristic curve theben Application This parameter should be changed only if the valve does not open with low actuating values.
Continuous valve actuator CHEOPS control Continuation: Designation Function of Object 6 Values Increase or decrease set point value Application Change set point value in increments via Object 6 Determines maximum actuating value Object 6 Determining the maximum actuating actuating value Sends the actual valve position Designation Values Transmission of maximum when internal actuating value actuating value is higher than the received Transmission of actual valve position theben Every 2 min Every 3
Continuous valve actuator CHEOPS control 3.4.
Continuous valve actuator CHEOPS control 3.4.11 theben Linear characteristic valve curve This setting should be used only for valves described exclusively as linear. Note: The values can be shown but not changed in this table. Table 21 Designation Valve position in % for 10% volume flow (1..99) Valve position in % for 20 % volume flow (1..99) Valve position in % for 30 % volume flow (1..99) Valve position in % for 40 % volume flow (1..99) Valve position in % for 50 % volume flow (1..
Continuous valve actuator CHEOPS control 3.4.12 theben Own characteristic valve curve Prof. setting for special valves. This parameter appears only when an internal characteristic valve curve has been selected from the "Unit settings" page. The actuator response can be accurately adjusted using the characteristic valve curve (manufacturer’s documentation). This parameter enables the Cheops control to be adjusted on a valve at 9 points of the characteristic curve (10%.....90%).
theben Continuous valve actuator CHEOPS control Diagram 1 shows a characteristic valve curve, as occurs frequently in practice. In this characteristic curve, a 30% flow occurs at a valve stroke as low as 10%. At a valve stroke of 50%, the flow is over 80%. Diagram 1 Example of a characteristic curve Volumetric flow 100% 80% 60% 40% 20% 0% 0% 20% 40% 60% 80% 100% Valve position A linear characteristic curve as shown in Diagram 2 would be ideal for the control.
Continuous valve actuator CHEOPS control theben 4 Start-up IMPORTANT INFORMATION. • During maintenance work on the radiator, the actuator is always dismounted and the valve securely closed by an alternative method (original protective cap etc…). The valve could be unexpectedly opened, potentially causing water damage, through either the control or the valve protector. • Cheops must already be mounted on the valve when the application is downloaded, otherwise no adaptation can take place. 4.
Continuous valve actuator CHEOPS control theben 4.2 Calibration strategies 2 additional calibration strategies from software V63. The aim is to enable adjustment to maximum number of different valves. The selection of the calibration strategy is made via input in the " Strategy for identifying valve " parameter (Device settings). 4.2.1 Strategy 1, standard The valve is measured during a calibration run (e.g. after reset) and the "valve open" and "valve closed" positions are stored.
Continuous valve actuator CHEOPS control theben 4.2.3 Strategy 3, with defined valve stroke. (Only for devices from software version 63) With this option, only the Open position of the valve is calculated by working back from a set path from the closing position. In order to close the valve, the actuator pushes out the tappet until the set force is exerted on the valve (closing force for standard valves/valves with high spring tension).
Continuous valve actuator CHEOPS control theben 4.2.
Continuous valve actuator CHEOPS control theben 4.3 Site function While the unit remains in the delivered condition, i.e. no further applications have been downloaded, Cheops control functions in field mode. This function enables Cheops control to be used immediately on site with basic functions. The set point temperature can be selected directly on the device using the red (+) and blue (-) keys. There are 5 set point temperature values available.
Continuous valve actuator CHEOPS control theben 5 Appendix 5.1 Determining the current set point value The current set point value can be adapted in line with certain requirements by selecting the operating mode. The operating mode can be specified by Objects 3…5. There are two methods available: 5.1.
Continuous valve actuator CHEOPS control theben 5.1.
Continuous valve actuator CHEOPS control theben 5.1.3 Set point value calculations Assuming the current operating mode, the current set point value of Cheops control is calculated as follows: A distinction is drawn between whether heating or cooling operation is currently required. 5.1.3.
Continuous valve actuator CHEOPS control theben 5.1.3.
Continuous valve actuator CHEOPS control theben This parameter indicates the maximum permitted offset and the increment per keystroke (or per activation of Object 6). 5.2.1 Incremental set point temperature adjustment via keys Each time the blue key is pressed, the set point value is decreased by one increment. Each time the red key is pressed, the set point value is decreased by one increment. When the max. permitted offset is reached, further keystrokes have no effect. 5.2.
Continuous valve actuator CHEOPS control theben 5.3.1 Connections Table 27 Name BUS E1 E2 Colour Black (-) Red (+) Yellow Green White Brown Function EIB bus line Binary input for window contacts(e) Binary input for presence indicator, presence key or analogue input for external temperature sensor 5.3.2 Input E1 E1 is used exclusively for window contacts (if present). The window contacts can be connected to E1 directly and without additional supply voltage.
Continuous valve actuator CHEOPS control theben 5.3.3 Input E2 • E2 as binary input: A presence indicator, switch or key can be directly connected here If a presence indicator (or switch) is used, the period of comfort mode is determined by the indicator, i.e. comfort mode remains in force for as long as presence is indicated. If a presence key is used, operation switches without time limit from standby to comfort mode when presence is indicated.
Continuous valve actuator CHEOPS control theben 5.4 Monitoring the actual value 5.4.1 Application Case 1: A sensor is connected to interface E2. Its connection line could be inadvertently interrupted or short-circuited, e.g. during building or renovation work. Case 2: The temperature is determined by a different EIB device and sent to Cheops control.
Continuous valve actuator CHEOPS control • theben Receive actual value via Object 2 First the monitoring period must be defined. This should be at least double the cycle time of the temperature transmitter (e.g. if the temperature is sent to Cheops control every 5 minutes, the monitoring period must be at least 10 minutes). The response to the actual value failure can then be programmed as above.
Continuous valve actuator CHEOPS control theben 5.5 Valves and valve seals 5.5.1 Valve structure Valve seat Tappet Rubber seal 5.5.2 Valves and valve seals When idle, i.e. tappet not actuated, the tappet is pushed outwards by the spring and the valve opens (100% with normal effect). When the tappet is pushed, the rubber seal is pressed into the valve seat and the valve closes (0% position with normal effect).
Continuous valve actuator CHEOPS control theben 5.6 Limit of actuating value To control the temperature, Cheops control sets an actuating value of between 0% and 100%. For practical reasons, it is not usually necessary to use the entire bandwidth of between 0% and 100%). 5.6.1 Minimum actuating value The unpleasant whistling noise that some valves can generate at low actuating value, can be avoided by specifying a minimum actuating value.
Continuous valve actuator CHEOPS control theben 5.7 Determine the maximum actuating value 5.7.1 Application If within a system all valve actuators are only slightly open, e.g. one at 5%, one at 12%, another at 7% etc., the heating boiler can reduce its output because only a small amount of heating energy is required.
Continuous valve actuator CHEOPS control theben 5.8 2-step heating A 2-step heating system consists of a slow main step and a fast additional step. Typically, Cheops control is plugged into the floor heating system (main step) and the radiators are controlled as the additional step. Cheops controls the two steps in parallel, the additional step being controlled at a lower set point value. The differential between main and additional step is defined on the "Set point value" parameter page.
Continuous valve actuator CHEOPS control theben 5.9 Temperature control 5.9.1 Introduction Cheops Control can be used as a P or a PI controller, although the PI control is always preferred. With the proportional control (P control), the actuating value is rigidly adjusted to the temperature differential. The proportional integral control (PI control) is far more flexible, i.e. controls more quickly and more accurately.
Continuous valve actuator CHEOPS control theben 5.9.2 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 Because our actual value lies outside the bandwidth, the control will control the flow at 100% i.e. at 4l / minute The supply quantity (actuating value) is calculated from the control deviation (set point value – actual value) and the bandwidth.
Continuous valve actuator CHEOPS control theben P-control as temperature control The P-control behaves during heating control as shown in the previous example. The set point temperature (21oC) can never quite be reached. The permanent control deviation increases as the heat loss increases and as the ambient temperature decreases. 5.9.3 Response of the PI-control Unlike the pure P-control, the PI-control works dynamically.
theben Continuous valve actuator CHEOPS control 6 Troubleshooting Caution: Error codes are only available in the version up to 2008. Table 28 Response Error code 82 84 All LEDs flash as continuous light from bottom to top, i.e. valve adaption was unsuccessful 81 81 81 83 Potential cause Remedy No valve Plug unit onto valve and reload application Valve tappet is already Use other valve adapter. touched, although the spindle Please contact our Customer of the valve actuator is fully Service.
Continuous valve actuator CHEOPS control theben Table 29: General, for every hard and software version.
Continuous valve actuator CHEOPS control theben 6.2 Read-out error code Important: The error code was replaced (from 2008) by the calibration strategy code. Up to 2008: If the valve causes an error message and the LEDs flash as continuous light, Cheops generates an error code. This remains in the BCU memory and can (start-up/test) be read-out using the ETS software. 1. Select device in the project and click on Test / Device memory viewer menu item 2. Enter memory area 1FB, deselect RAM and EEPROM 3.
theben Continuous valve actuator CHEOPS control 4.
theben Continuous valve actuator CHEOPS control 6.3 Checking end position The end positions stored during the adaption process can be read out in exactly the same way as the error numbers using the ETS software. The internal stop position (spindle inserted, valve open) is stored in Hex-format under the address $1FC and the external stop position under $1FD. After downloading the application, these values are reset (i.e. $1FC = 00 and $1FD = FF).
Continuous valve actuator CHEOPS control theben 6.4 Checking adapter ring The maximum dimension between top edge of adapter ring and end of tappet is 4.7 mm. If this dimension is over-run, an alternative adapter ring must be used. Max. 4,7mm 6.5 Reading the software version number Cheops displays the current software version via LEDs. After reset, this is displayed as a binary number in three stages.
theben Continuous valve actuator CHEOPS control 6.5.
Continuous valve actuator CHEOPS control theben 7 Glossary 7.1 Basic set point value The basic set point value is the standard temperature for comfort mode and the reference temperature for reduction in standby and night modes. The programmed basic set point value (see "Basic set point value after download of application" is stored in Object 0 and can be changed at any time by sending a new value to Object 0 (EIS5). After reset (bus returned), the last used basic set point value is restored. 7.
Continuous valve actuator CHEOPS control theben 7.4 Dead zone The dead zone is a buffer area between heating and cooling operation. Neither heating nor cooling takes place within this dead zone. If Cheops control switches to cooling operation, the set point value is increased internally by the amount of the dead zone. Without this buffer zone, the system would switch continuously between heating and cooling.
