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Mathematics function

Mathematics function

Function description

The Mathematics function applies various mathematical calculations and functions to four val

ues of analogue input variables to produce four different calculated results. The results can be

assigned to selected function quantities.

Input variables

Enable

General enabling of the function (digital value ON/OFF)

Result (enable = off)

Analogue value for the

Result

output variable when Enable is OFF

Result ABCD

(enable = off)

Analogue value for the

Result ABCD

output variable when Enable is OFF

Result AB

(enable = off)

Analogue value for the

Result AB

output variable when Enable is OFF

Result CD

(enable = off)

Analogue value for the

Result CD

output variable when Enable is OFF

Input variable A - D

Analogue values for the mathematical calculations (to five decimal

places)

• If the function is blocked (Enable = Off), it issues values which are either defined by the user

with Result (enable = off) or which come from a specific source. Enable can therefore be used

to switch between analogue values.
As the function produces four different results, there are also four input variables for those

results when Enable is OFF.

• If the source of an input variable is set to

User

, the user can specify an adjustable numeric

value.

• As the mathematical calculations can be carried out either using all four input variables or

using two of them, appropriate selection of the unused input variables is important for a cor

rect result.

Содержание CAN-EZ3

Страница 1: ...ta co at CAN EZ3 CAN ENERGY METER General information Installation and connection Relevant functions English Manual Version 1 07 4...

Страница 2: ...rminal diagram DL bus data link 15 CAN Bus network 16 Wireless system CORA 20 Principles 20 Pairing CORA devices 20 Relaying wireless signals 21 Deleting a pairing 21 Operation and programming 22 Inpu...

Страница 3: ...value type 57 Digital 57 Analogue 58 Pulse 59 Function quantity 59 Designation 59 Restriction of change authority 59 Functions 60 Messages 61 CAN bus 62 Datalogging 63 Datalogging Settings 63 Datalog...

Страница 4: ...variables 76 Parameters 77 Output variables 77 General settings 78 Current transformer 78 Phase simulation 78 Language 78 Brightness 78 Display timeout 78 Simulation 79 Currency 79 Access to menu 79 U...

Страница 5: ......

Страница 6: ...r another system component Maintenance If treated and used correctly the device will not require any maintenance Use a cloth moistened with mild alcohol such as methylated spirits to clean Never use c...

Страница 7: ...ecific functions are used for the ac tual purpose of the energy meter and these are described in these instructions For tasks such as heat metering 4 analogue inputs for temperature sensors 2 inputs f...

Страница 8: ...required wires are connected to the voltage terminals in the CAN EZ3 The connection of sensors and CAN and DL buses is carried out using the supplied connectors Power supply The CAN EZ3 is supplied w...

Страница 9: ...gulations The safety requirements on page 6 must also be observed The following diagram is only an example of the installation of a CAN EZ3 in a typical TN S system with surplus power supply NZHS Norm...

Страница 10: ...in accordance with the following description CAN bus C L C H 12 V GND CAN Low CAN High 12 V earth The principles of bus cabling are described extensively in the manuals for the free ly programmable co...

Страница 11: ...ransformers are connected to terminals I1 I3 in the correct sequence and folded over the wires to be measured For single measurements it is possible to set the Phase simulation parameter in the Genera...

Страница 12: ...can be damaged Each external current transformer is labelled with K L whereby the energy direction must be from K to L for positive metering The poles of the cable connecting the electricity sensor a...

Страница 13: ...domestic hot water required during the heating season The supplied cable fitting acts as strain relief Installation below the associated coil or heat exchanger is not permissible under any cir cumstan...

Страница 14: ...mperature influences from nearby air shafts open windows cable ways etc It must not be subjected to direct insolation Sensorleitungen All sensor leads with a cross section of 0 5 mm2 can be extended t...

Страница 15: ...two cable conduits or the use of screened cables Use separate screened cables when capturing data from two controllers with a single datalogger Never run the data link together with a CAN bus cable i...

Страница 16: ...easures Cable screening The bus cable screen must be connected well at every node to provide continuity For larger networks we recommend including the screen in the equipotential bonding in line with...

Страница 17: ...strike In order to protect against voltage surges in the 230 V mains supply cable indirect lightning strike appropriate lightning conductors and surge arresters compliant with local regulations must...

Страница 18: ...me transfer rate in order to be able to communicate with each other Recommendations A 2x2 pole screened twisted pair twist CAN L with CAN H or 12 V with GND with a cable cross section of at least 0 5...

Страница 19: ...ple Connection of three network nodes NWN with a 2x2 pole cable and termination of the ter minal network nodes network inside one building Each CAN network is to be provided with a 120 ohm BUS termina...

Страница 20: ...can be found in the main menu item CORA devices Pairing CORA devices In the ATON set the included CAN EZ3A energy meter and the EHS R immersion heater are already paired at the factory In the main men...

Страница 21: ...However CORA 1 can reach CORA 2 and CORA 2 can reach CORA 3 During parameterisation on CORA 1 pairing with CORA 3 the CORA ID of CORA 3 is entered under CORA ID and the CORA ID of CORA 2 is en tered...

Страница 22: ...The energy meter has 8 inputs for analogue measurements digital signals ON OFF or pulses Important Connections VT1 and DI1 input 7 and VT2 and DI2 input 8 cannot be used at the same time but use of V...

Страница 23: ...r replaced with your own programming Overview of TAPPS2 programming Inputs Datalogging The following values are logged in data record Analogue values data record Digital values is un used Datalogging...

Страница 24: ...ory records the values of the heat meter and energy meter totals them and stores them in differential mode The mathematics function uses output variable Result to offer a display value for the totalle...

Страница 25: ...the COP value is a good criterion for heat pumps Test institutes determine this value according to a defined measuring method DIN EN 255 However performance number and COP value do not allow any energ...

Страница 26: ...er that cannot be generated by the system any longer with the result that power is briefly drawn from the grid to meet the set output level By specifying a negative value power is exported to the grid...

Страница 27: ...Energy manager 27 Example of a standard diagram Energy manager with output control CAN EZ3 and EHS R...

Страница 28: ...d in the installation instructions for the corresponding devices Input variables Enable General enabling of the function digital value ON OFF Minimum output Upper and lower limits of the output to be...

Страница 29: ...witches the consumer the calculation of the function is much quicker than values can be transferred via the CAN bus This can have a negative impact on delayed responses of the control characteristics...

Страница 30: ...ative note that the metering will be negative as well i e the metered values can also become negative The meter reset is carried out by means of a digital ON pulse or manually from the parameter menu...

Страница 31: ...um Prev week sum Month sum Prev month sum Year sum Prev year sum Sum total PLEASE NOTE The meter readings from the Energy meter function module are saved to the internal memory every hour Therefore in...

Страница 32: ...a solar thermal system the collector sensor can also be used as the flow sensor For that to be possible it must be installed in a sensor well at the flow outlet of the collector header However the ca...

Страница 33: ...com pensate this error After selecting Start calibration the user is prompted to confirm If the calibration was per formed by mistake or incorrectly the result can be undone with Delete calib values a...

Страница 34: ...ing therefore equals 1 19 x 1 015 1 208 This means heat metering accuracy of 20 8 in the worst case scenario at 10 K spread without calibrating the temperature sensors although all measuring errors wo...

Страница 35: ...ng Kilowatt hours total Day sum Display of yield in the set currency Previous day sum Week sum Prev week sum Month sum Prev month sum Year sum Prev year sum Sum total ATTENTION The meter readings from...

Страница 36: ...th their unit and their decimal places Differential mode The differentials of the calculated values between beginning and end of the day month and year are saved This version is suitable for example f...

Страница 37: ...ln and log The fields marked Operator 1 3 are for selecting the arithmetic operation Addition Subtraction Multiplication x Division Modulo remainder from a division Exponentiation The brackets must be...

Страница 38: ...able is OFF Result CD enable off Analogue value for the Result CD output variable when Enable is OFF Input variable A D Analogue values for the mathematical calculations to five decimal places If the...

Страница 39: ...c operation is performed according to the following formula The first field Function can remain empty in which case it has no effect on the arithmetic oper ation In this field a function can be select...

Страница 40: ...s C and D without any func tion calculation The results are produced with the selected function quantity unit and the decimal places specified by it and can be used as input variables for other functi...

Страница 41: ...or for heat metering therefore equals 1 19 x 1 015 1 208 This means heat metering accuracy of 20 8 in the worst case scenario at 10 K spread without calibrating the temperature sensors although all me...

Страница 42: ...l reset deletes all function modules the parameter settings for all inputs and outputs bus in puts and outputs fixed values system values and the CAN bus settings LED status indicators LED indicators...

Страница 43: ...ough menus Twisting it clockwise nav igates downwards in a menu twisting it counter clockwise navigates upwards Pushing the wheel 2 down opens the currently selected menu enables changing the currentl...

Страница 44: ...of the Message function Indicator light Explanation Steady red light The controller is booting up start routine after switching on resetting or updating or Steady orange light Hardware is initialising...

Страница 45: ...s displayed for entering numeric values Name of the numeric value entry range Current numeric value The current value is shown example 22 0 C The top line shows the entry range example 0 0 45 0 C The...

Страница 46: ...from the technician or expert level can be created changed or deleted globally Displayed in Technician or Expert mode only View with designations defined previously Entries are made up of letters numb...

Страница 47: ...et to No Date The current date dd mm yy Time The current time GPS latitude Geographical latitude according to GPS global position ing system GPS longitude Geographical longitude according to GPS Sunri...

Страница 48: ...48 Value summary In this menu the sensor inputs DL bus inputs and analogue digital CAN bus inputs can be clearly displayed If an entry is selected the corresponding values are listed below...

Страница 49: ...Sensor type and measured variable Once the required input is selected the sensor type can be defined First you must specify the basic type of input signal Digital Analogue Pulse Typ I 1 I 2 I 3 I 4 I...

Страница 50: ...r type RFS Rain sensor type RES Also select the process variable for the measured variables Voltage and Resistance Then you must use scaling to define the value range Example Voltage Global radiation...

Страница 51: ...ate measured variable This is the flow rate in litres per pulse Setting range 0 1 100 0 l pulse Pulse This measured variable is used as the input variable for the Meter Counter function as a pulse cou...

Страница 52: ...adiation Humidity and Rain The corrected value is utilised for all calculations and displays Example Pt1000 temperature sensor Average This setting refers to the average of the measurements over time...

Страница 53: ...f the value exceeds the upper measure ment limit The Standard values for temperature sensors are 9999 9 C for a short circuit and 9999 9 C for a lead break Those values are utilised in the internal ca...

Страница 54: ...ible to external interference their sensor leads must be screened and the Average time should be increased Nevertheless the accuracy specified in the technical data for PT1000 sensors cannot be guaran...

Страница 55: ...tance at the minimum temperature of the temperature range R2 HT Resistance at the maximum temperature of the temperature range T1 NT Minimum temperature of the temperature range T2 HAT Maximum tempera...

Страница 56: ...to 64 fixed values which can be used as input variables for functions for example When this item is selected in the main menu the fixed values already defined are displayed together with their designa...

Страница 57: ...n No Yes Select whether the status can be changed via a selection box or simply by a click Changing a digital fixed value Tapping a button with a light background allows you to change the fixed value...

Страница 58: ...n you must define the permitted limits and the current fixed value The value can be adjusted in the menu within those limits Example Changing an analogue fixed value Tapping a button with a light back...

Страница 59: ...tivated either an ON pulse from OFF to ON or an OFF pulse from ON to OFF will be generated depend ing on the selection made here Designation Enter the fixed value designation by selecting a predefined...

Страница 60: ...ction Under Type you select which function is to be created The line at the top of the menu provides access to fiD type and designation input variables param eters output variables and links The menu...

Страница 61: ...61 Messages This menu item displays activated messages Example Message 21 is active...

Страница 62: ...ne network Every CAN bus device must be given its own node number in the network The cable topology of a CAN bus network is described in the installation instructions The CAN network allows communicat...

Страница 63: ...n this sub menu The sources for the logged values can be inputs outputs function output variables fixed values sys tem values and DL and CAN bus inputs Note Digital inputs must be defined within the r...

Страница 64: ...is specified for most CAN bus devices Important All devices in the CAN bus network must have the same transfer rate in order to be able to communicate with each other The bus rate can be set to betwee...

Страница 65: ...red the other settings can be specified The number of a CAN analogue output is taken from the device with that node number and applied here Example On CAN analogue input 1 the output number applied is...

Страница 66: ...react appropriately to a failure of the CAN bus or transmission node In System values General a network error for all CAN inputs is available Sensor check If you set Sensor check to Yes the sensor er...

Страница 67: ...This allows the controller to react to the failure of a sensor for example If the Standard thresholds are selected a short circuit will be indicated if the value falls below the measurement limit and...

Страница 68: ...lay for the CAN digital input can be changed from Off On to No Yes and you can define whether the controller should issue the last status transmitted Un changed or a definable substitute status when t...

Страница 69: ...ared to the last transmitted value a new transmission is made The unit used by the source is applied to the output value minimum setting 0 1 K Blocking time 10 s If the value changes by more than 1 0...

Страница 70: ...menu view the network overview opens All active CAN nodes with node number and device designation are displayed here Select an x2 device to be able to access it This view shows a CAN EZ3 with node num...

Страница 71: ...e DL bus and for display on the RAS PLUS room sensor The C M I can be used for DL datalogging Only the input and output values and the 2 heat meters are included in the data output the values of the n...

Страница 72: ...e or digital DL bus address and DL bus index Every DL sensor must have its own DL bus address Setting the address of a DL sensor is described in the sensor s datasheet Most DL sensors can measure vari...

Страница 73: ...e of the DL bus or DL sensor In System values General a network error for all DL inputs is available Sensor check If you set Sensor check to Yes the sensor error of the sensor supplying the DL input i...

Страница 74: ...fied for the controller in the event of sensor failure at the transmission node in order to allow a function to continue operating in emergency mode fixed hysteresis 1 0 C The short circuit threshold...

Страница 75: ...of the source in the energy meter from which the value for the DL output stems Inputs Outputs Functions Fixed values System values CAN bus analogue CAN bus digital Example Digital value source the re...

Страница 76: ...w network node select New network node fiD sub menu After creating a network node select that node Type determines the device type with which a connection is to be estab lished currently only EHS is a...

Страница 77: ...meter is set to Yes attempts will be made at increasingly long intervals to re establish a connection to the target device Pair Make a single manual attempt at pairing With Connect automatically if se...

Страница 78: ...former up to 100 A special accessory Phase simulation See chapter Electrical measurement in the installation instructions Language Select the display language Brightness Select the brightness of the d...

Страница 79: ...d Select from AUS Analogue Simulation with the EWS16x2 development set CAN SIM board Simulation with SIM BOARD USB UVR16x2 for simulation in a system The simulation mode is ended automatically when yo...

Страница 80: ...Technician or Expert level View with designations defined previously Entries are made up of letters numbers and symbols entered consecutively Up to 100 different designations can be defined by the use...

Страница 81: ...controller returns to the User level and applies the programmed passwords When the controller is started the controller is always in the User level Changing the password An Expert can change the passw...

Страница 82: ...s no access to the parameters Messages display of active messages hiding and deleting messages CAN and DL bus no access to the parameters General settings language brightness and display timeout can b...

Страница 83: ...83 Version and serial number This menu item displays the operating system version firmware The serial number is also visible on the controller s rating plate upper side panel...

Страница 84: ...r expert mode You can perform the following actions in this menu Save load or delete function data Load firmware Load or delete a function overview Display the status of the data transfer Restart the...

Страница 85: ...ls the action If function data is loaded onto the controller a _Backup dat file is created on the SD card with the old function data Once the function data is loaded the controller returns to the User...

Страница 86: ...onfirmation prompt appears which you can confirm by tapping Tapping cancels the action Rename file The file name can be changed using a keyboard Umlauts are not possible The file name must be no longe...

Страница 87: ...SD card If you want to save the function data under a new name tap on the button You can then enter a new name and save the file umlauts cannot be en tered The file name must be no longer than 63 cha...

Страница 88: ...echnician or expert password has been entered for the tar get device As when loading function data the saved firmware files can be deleted renamed or loaded onto oth er x2 devices Return from this sel...

Страница 89: ...d out Answer by tapping either Yes or No If a total reset is carried out a _Backup dat file is created on the SD card with the old function data Restart At the end of the Data admin menu there is an o...

Страница 90: ...The sensor errors and network errors are global digital values No Yes which are not connected to the error status of a specific sensor or network input If any one of the sensors or network inputs has...

Страница 91: ...see Shading function Direction of the sun see Shading function Solar altitude 0 digital value yes no High sun time Total apparent power kW Apparent power L1 L2 L3 kW Total real power kW Real power L1...

Страница 92: ...mers Max 20 kVA per phase for 100 A current transformers Max 70 kVA per phase for 400 A current transformers Resolution 10 VA Maximum cable diameter for current transformers 10 mm for standard current...

Страница 93: ...Alternative RT GmbH A 3872 Amaliendorf Langestra e 124 This declaration is submitted by Dipl Ing Andreas Schneider General manager 19 07 2019 This declaration certifies the agreement with the named s...

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Страница 96: ...tallation instructions or incorrect maintenance 4 The warranty claim will expire if repairs or actions are carried out by persons who are not authorised to do so or have not been so authorised by us o...

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