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Siemens RWF40.000A97 User Manual

Rwf40 series, compact universal controllers.
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RWF40...
Compact Universal Controllers
optimized for temperature and pressure control in connection with modulating or multistage burners
User Manual
The RWF40... controller and this User Manual are intended for use by OEMs which integrate the controller into
their products!
Siemens Building Technologies
HVAC Products
CC1B7865en
05.12.2002

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   Summary of Contents for Siemens RWF40.000A97

  • Page 1 User Manual The RWF40... controller and this User Manual are intended for use by OEMs which integrate the controller into their products! Siemens Building Technologies HVAC Products CC1B7865en 05.12.2002...
  • Page 2 2/57 CC1B7865en 05.12.2002 HVAC Products...
  • Page 3: Table Of Contents

    Contents Introduction..................6 General notes......................... 6 Description ........................6 Typographical conventions ..................7 1.3.1 Warning symbols ......................7 1.3.2 Notification symbols......................7 1.3.3 Presentation........................7 Type of unit................... 8 Type field ........................8 Installation.................... 9 Installation site and climatic conditions..............9 Dimensions ........................
  • Page 4 Operation .................... 29 Basic display ....................... 30 6.1.1 Meaning of the display and buttons ................30 User level ........................31 6.2.1 Changing the setpoints ....................31 6.2.2 Manual operation of a modulating burner ..............33 6.2.3 Manual operation of a 2-stage burner ................33 6.2.4 Start self-setting ......................
  • Page 5 Technical data ..................52 11.1 Inputs ..........................52 11.1.1 Analog input 1 (actual value) ..................52 11.1.2 Analog input 2 (external setpoint, setpoint shift)............52 11.1.3 Analog input 3 (outside temperature) ................53 11.1.4 Binary input «D1» ......................53 11.1.5 Binary input «D2»...
  • Page 6: Introduction

    1. Introduction 1.1 General notes Please read this User Manual before switching on the controller. Keep the User Manual in a safe place which can be accessed by all users at all times. Please help us improve the information given in the User Manual. Your suggestions will be welcome. All necessary settings and, where required, the settings to be made inside the unit, are described in this User Manual (applicable to controller software version 126.01.01).
  • Page 7: Typographical Conventions

    1. Introduction 1.3 Typographical conventions 1.3.1 Warning symbols The signs for Danger and Caution are used in this User Manual under the following conditions: Danger This symbol is used where there may be a danger to staff if the instructions are disregarded or not strictly observed! Caution This symbol is used where there may be damage to equipment or data if the...
  • Page 8: Type Of Unit

    The type field is glued onto the housing. The type designation consists of operating voltage and type reference of the unit. Types Type of unit Description RWF40.000A97 Basic version with floating output RWF40.010A97 ¹· RWF40.001A97 With additional analog output RWF40.011A97 ¹·...
  • Page 9: Installation

    3. Installation 3.1 Installation site and climatic conditions - The installation site should be free from vibrations, dust and corrosive media - The controller should be installed away from sources of electromagnetic fields, such as variable speed drives or high-voltage ignition transformers Relative humidity: <...
  • Page 10: Side-by-side Mounting

    3. Installation 3.3 Side-by-side If several controllers are mounted side-by-side or above one another in a control panel, minimum spacing must be observed: 30.5 mm vertically and 10.5 mm horizontally. 3.4 Mounting in a panel cutout ‫ ٭‬Place the seal supplied with the unit onto the controller housing. The unit must be installed with the seal so that no water or oil can penetrate the housing! ‫...
  • Page 11: Cleaning The Front

    3. Installation 3.5. Cleaning the front The front can be cleaned with normal washing and rinsing agents or detergents. The front is not resistant to corrosive acids, caustic solutions and abrasive cleaners. Do not clean with high-pressure cleaners! 3.6 Removing the controller module The controller module can be removed from the housing for service.
  • Page 12: Electrical Connections

    4. Electrical connections 4.1 Installation notes Safety regulations - The choice of cable, installation and electrical connections of the controller must conform to VDE 0100 «Regulations for the installation of power circuits with nominal voltages below AC 1000 V», or the relevant local regulations - The electrical connections must be made by qualified staff - If contact with live parts is possible while working on the unit, the controller must be disconnected from the power supply (all-polar disconnection)
  • Page 13: Block Diagram

    4. Electrical connections 4.2 Block diagram 3 analog inputs Release of burner Input 1: Output 1: Actual value - Relay (N.O. contact) for Pt100, Ni100, Landis & Staefa Pt1000, LG-Ni1000, thermocouples Floating output or standard signals Output 2: -Relay (actuating device open) Input 2: External setpoint, Output 3:...
  • Page 14: Assignment Of Terminals

    4. Electrical connections 4.3 Assignment of terminals Electrical connections may only be made by qualified personnel! 7865z07/1199 Outputs Display LED Terminal no. Connection diagram Relay 1: Release of burner Q14 pole Can be used as a thermal reset limit thermostat to DIN 3440 Contact protection: Varistor S07K275 Q13 N.O.
  • Page 15 4. Electrical connections Analog input 1 (actual value) Terminals Connection diagram Thermocouple 7865a03/1099 Resistance thermometer in 3-wire circuit 7865a04/1099 Resistance thermometer in 2-wire circuit, line compensation via offset correction (OFF1) 7865a05/1099 Current input DC 0...20 mA, 4...20 mA 7865a06/1099 Voltage input DC 0...1 V, 0...10 V 7865a07/1099 Analog input 2 (setpoint and setpoint shift)
  • Page 16 4. Electrical connections Binary inputs Terminals Connection diagram Operating mode selector ð Section 5.2 «High-fire operation» Setpoint shift / changeover ð Sections 5.4.1...5.4.4 7865a12/1099 Common ground Operating voltage, interface Terminals Connection diagram Operating voltage L1 live conductor AC 100...240 V ±10 %, 48...63 Hz N neutral conductor Technical earth 7865a18/1099...
  • Page 17: Galvanic Separation

    4. Electrical connections 4.4 Galvanic separation The diagram shows the maximum potential differences that may exist between the function modules in the controller. 3 analog inputs Limit comparator Input 1: Output 4: Actual value - Relay (N.O. contact) for Pt100, Ni100, Landis &...
  • Page 18: Operating Modes

    5. Operating modes 5.1 Low-fire operation Low-fire operation means that only small amounts of heat are drawn from the boiler. A 2- position controller maintains the setpoint, switching the burner on and off like a thermostat. This mode of control is known as the thermostat function. An adjustable switching Thermostat function differential ensures that the burner’s witching frequency can be selected, aimed at reducing wear.
  • Page 19: Modulating Burner, Analog Output

    5. Operating modes 5.2.2 Modulating burner, analog output In diagram area (1), the thermostat function is active. In area (2), the controller maintains the adjusted setpoint. 7865w05/1099 HYS3 HYS1 100% The positioning signal is delivered as a standard signal via the analog output. The modulating controller must be available and configured in the unit (optional).
  • Page 20: 2-stage Burner, Analog Output

    5. Operating modes 5.2.4 2-stage burner, analog output In this case, a standard binary signal switches the second stage into circuit with analog output «X1» on reaching the switch-on threshold «HYS1» and switches it out of circuit at the lower switch-off threshold «HYS2». 7865w04/1099 HYS3 HYS2...
  • Page 21: Setpoint Changeover «sp1 / Sp2», Analog Setpoint Shift

    5. Operating modes 5.4.1 Setpoint changeover «SP1 / SP2», analog setpoint shift C111: XX1X ... XX3X Outside sensor C111 and C112 are described in chapter 8 Heating curve slope H Setting: 0.0 ... 4.0 Weather-dependent setpoint shift: C112: XX0X C112: XX1X SP1 via buttons SP1 via outside sensor C111: XXX2...
  • Page 22: Setpoint Changeover «sp1» / External Setpoint

    5. Operating modes 5.4.2 Setpoint changeover «SP1» / external setpoint C111: XX1X ... XX3X Outside sensor C111 and C112 are described in chapter 8 Heating curve slope H Setting: 0.0 ... 4.0 Weather-dependent setpoint shift: C112: XX0X C112: XX1X SP1 via buttons SP1 from outside sensor C111: X1XX ...
  • Page 23: Setpoint «sp1», Analog / Binary Setpoint Shift

    5. Operating modes 5.4.3 Setpoint «SP1», analog / binary setpoint shift C111: XX1X ... XX3X Outside sensor C111 and C112 are described in chapter 8 Heating curve slope H Setting: 0.0 ... 4.0 Weather-dependent setpoint shift: C112: XX0X C112: XX1X SP1 via buttons SP1 via outside sensor C111: X6XX ...
  • Page 24: External Setpoint, Binary Setpoint Shift

    5. Operating modes 5.4.4 External setpoint, binary setpoint shift C111: X1XX ... X5XX C111 and C112 are described in chapter 8 External setpoint C111: XXX1 C111: XXX2 C111: XXX0 Sections 5.4.1 and 5.4.2 Binary setpoint shift "Setpoint changeover ..." No function D2 closed D2 open SPH / oLHi...
  • Page 25: Weather-dependent Setpoint Shift

    5. Operating modes 5.5 Weather-dependent setpoint shift The RWF40... can be configured such that if an outside sensor with an LG-Ni1000 sensing element (e.g. QAC22) is used, a weather-dependent setpoint shift will be implemented. The minimum and maximum setpoint values can be set by the lower setpoint limit «SPL»...
  • Page 26: Heating Curve Slope

    5. Operating modes 5.5.1 Heating curve slope Slope «H» of the heating curve can be used to adjust the setpoint in response to the outside temperature, as shown in the diagram. The common origin of the heating curves is set at (20 °C / 20 °C). The effective range of the weather-dependent setpoint is restricted by the setpoint limits «SPH»...
  • Page 27: Response Threshold «q

    5. Operating modes 5.6 Response threshold «Q» The response threshold «Q» defines for how long and how low the actual value is allowed to drop before the system switches to high-fire operation. An internal mathematical calculation using an integration function determines the sum of all the areas Q = Q1 + Q2 + Q3, as shown in the diagram.
  • Page 28: Cold Start Of Plant

    5. Operating modes 5.7 Cold start of the plant When a heating system is switched off for a longer period of time, the actual value will drop of course. To achieve a faster control response, the controller immediately starts in high-fire operation as soon as the control deviation (x-w) drops below a certain limit value.
  • Page 29: Operation

    6. Operation Assignment of levels All levels can be accessed from the basic display via the button, as shown in the diagram. The upper actual value display (red) shows the actual value and the parameter values for the various levels. The setpoint and parameters are shown in the lower section of the display (green).
  • Page 30: Basic Display

    6. Operation 6.1 Basic display The diagram shows the RWF40... after switching power on. This condition is called the basic display. The actual value and the currently active setpoint are shown here. Manual operation, self-setting, the user, parameter and configuration levels can be activated from here.
  • Page 31: User Level

    6. Operation Initialization All displays light up. The setpoint display flashes for about 10 seconds after switching power on. Manual operation The upper display shows the actual value. The LED for manual operation is on. Depending on the operating mode and the type of controller, the setpoint or the level of the manual actuator position is shown on the setpoint display (green).
  • Page 32 6. Operation Basic display 60.3 65.0 User level 65.0 (Display depends on code 111) EXIT SP 1 70.0 10.0 Depending on the configuration of EXIT binary input 2: SP 2 - dSP -Sp2 10.0 Measurement of the outside temperature EXIT via analog input 3 50.0 Measurement of the...
  • Page 33: Manual Operation Of A Modulating Burner

    6. Operation 6.2.2 Manual operation, modulating burner ‫ ٭‬Press EXIT for 5 seconds The LED above the hand symbol will light up. > ‫ ٭‬Change the position of the actuating device with Floating controller Relay 2 opens the actuating device as long as is kept depressed.
  • Page 34: Start Self-setting

    6. Operation 6.2.4 Start self-setting > ‫ ٭‬Start self-setting with ‫ ٭‬Cancel with 7865z10/1199 When «tunE» stops flashing, self-setting has stopped. ‫ ٭‬Accept the parameters that have been determined by pressing (press the button for at least 2 seconds!) It is not possible to start «tunE» in manual operation or thermostat operation. 6.2.5 Display of the software version and of unit of actual value ‫...
  • Page 35: Parameter Level

    6. Operation 6.3 Parameter level The parameters involved in adapting the controller to the controlled system are set here after the system has been started up. Within the level, you can proceed to the next parameter by pressing The display of the individual parameters depends on the type of controller. 6.3.1 Entering parameters Entry and alteration of the parameters is made through continuous alteration of the value.
  • Page 36: Parameter Settings

    7. Parameter settings The parameter is shown on the lower setpoint display (green) and the parameter value on the upper / actual value display (red). 7865p06/0200 Parameter Display Value range Factory Remarks setting Output 4 Limit value for limit -1999...+9999 digit comparator HYSt Measured value...
  • Page 37 7. Parameter settings The parameter is shown on the lower / setpoint display (green) and the parameter value on the upper / actual value display (red). 7865p06/0200 Display Parameter Value range Factory Remarks setting Actuator running 10...3000 s 15 s Running time of the valve for use with time floating controllers...
  • Page 38: Configuration

    8. Configuration 8.1 C111 inputs 0000 C111 7865p03/0200 Analog input 1 Pt100, 3-wire, IEC 751 Pt100, 2-wire, IEC 751 Ni100, 3-wire, DIN 43760 Ni100, 2-wire, DIN 43760 Landis & Staefa Pt1000, 3-wire, IEC 751 Landis & Staefa Pt1000, 2-wire, IEC 751 Ni1000, 3-wire, DIN 43760 Ni1000, 2-wire, DIN 43760 LG-Ni1000, 3-wire...
  • Page 39 8. Configuration 0000 C111 7865p03/0200 Analog input 3 No function Outside sensor Landis & Staefa Pt1000, 2-wire, IEC 751 Outside sensor Ni1000, 2-wire, DIN 43760 Outside sensor LG-Ni1000, 2-wire Function of binary input «D2» No function Setpoint changeover Setpoint shift (binary) Factory setting HVAC Products CC1B7865en...
  • Page 40: C112 Limit Comparator, Controller Type, Setpoint «sp1», Locking

    8. Configuration 8.2 C112 limit comparator, controller type, setpoint «SP1», locking 0000 C112 7865p04/0200 Limit comparator No function (lk off) lk1, input 1 lk2, input 1 lk3, input 1 lk4, input 1 lk5, input 1 lk6, input 1 lk7, input 1 lk8, input 1 lk7, input 2 lk8, input 2...
  • Page 41 8. Configuration Function Ik1 Window function: Relay «K6» is active when the measured value lies within a window about the setpoint (w). Example: w = 80 °C, AL = 5, HYSt = 2 Measured value rising: Relay «K6» switches on at 76 °C and off at 86 °C. Measured value falling: Relay «K6»...
  • Page 42 8. Configuration Function Ik4 Like lk3, but inverted switching function. Output 4 HYSt Measured value 7865d03e/0300 HYSt = switching differential AL = interval from setpoint ð Chapter 7 «Parameter settings» Function Ik5 Upper limit signaling Function: Relay inactive when measured value > (setpoint + limit value). Example: w = 80 °C, AL = 10, HYSt = 2 Measured value rising: Relay «K6»...
  • Page 43 8. Configuration Function Ik7 The switching point is independent of the controller setpoint; only the limit value «AL» determines the switching point. Function: Relay is active when measured value > limit value. Example: AL = 50, HYSt = 2 Measured value rising: Relay «K6» switches on at 51 °C. Measured value falling: Relay «K6»...
  • Page 44: C113 Unit Address, Dimensional Unit, Out-of-range

    8. Configuration 8.3 C113 instrument address, dimensional unit, out-of-range The setting of the decimal place has an impact on the parameters that are dependent on the 0000 actual value! C113 7865p05/0200 Unit address Address 0 Address 1 Address 99 Decimal place, unit, Baud rate No decimal place, degrees Celsius, 9600 Bd One decimal place, degrees Celsius, 9600 Bd No decimal place, degrees Fahrenheit, 9600 Bd...
  • Page 45: Sch Scaling Of Standard Signal Range End, Analog Input 1

    8. Configuration 8.3.1 «SCL» scaling of standard signal range start, analog input 1 Example SCL = 20; SCH = 100 °C 0 mA (start) corresponds to a measured value of 20 °C 0 mA 20 mA 0 °C 20 °C 100 °C Value range: -1999...+9999 digit Factory setting: 0 digit...
  • Page 46: Sch2 Scaling Of Standard Signal Range End, Analog Input 2

    8. Configuration 8.3.4 «SCH2» scaling of standard signal range end, analog input 2 Example SCH2 = 80: 20 mA corresponds to a measured value of 80 °C, as already described Value range: -1999...+9999 digit Factory setting: 100 digit 8.3.5 «SPL» lower setpoint limit The controller restricts the setpoints to the set value.
  • Page 47: Ollo Lower Working Range Limit (only With Rwf40.0x2b97)

    8. Configuration 8.3.12 «oLLo» lower working range limit (only with RWF40.0X2B97) The lower working range limit limits the control range in the downward direction. This limitation is independent of the setpoint adjustment and hysteresis 1. If switch-on threshold «SP + Hyst1 < oLLo» falls below the lower working range limit, the switch-on threshold will be replaced by the lower working range limit.
  • Page 48: Self-setting Function

    9. Self-setting function 9.1 Self-setting function in high-fire operation «tunE» is only possible in high-fire operation, in the «modulating burner» mode. The self-setting function «tunE» is a proper software function unit that is integrated into the controller. In the «modulating» mode, «tunE» tests the response of the controlled system to steps of the positioning signal according to a special procedure.
  • Page 49 9. Self-setting function Start 7865d13/1099 The controlled system data recorded for the forced oscillations are used to calculate the controller parameters «rt, dt, Pb.1» and a filter time constant for actual value filtering that is optimized for this controlled system. - High-fire operation in the «modulating burner»...
  • Page 50: Checking The Controller Parameters

    9. Self-setting function 9.2 Checking the controller parameters The optimum adjustment of the controller to the controlled system can be checked by recording a startup sequence with the control loop closed. The following diagrams indicate possible incorrect adjustments, and their correction. Example The response to a setpoint change is shown here for a 3 order controlled system for a...
  • Page 51: What To Do If

    10. What to do if ... 10.1 ...numbers are flashing on the display This is an indication of incorrect measured value acquisition. Detection of measured value range crossings depends on the type of sensor used. ð Section 11.3.2 «Measured value circuit monitoring» Display Description Cause / controller behavior / remedy...
  • Page 52: Technical Data

    11. Technical data 11.1 Inputs 11.1.1 Analog input 1 (actual value) For resistance thermometers, thermocouples or standard signals with 2 order digital filter (configurable). Resistance thermometers In 2-wire or 3-wire circuit: Type Measured value range Pt100, Landis & Staefa Pt1000, IEC 751 -200...+850 °C (-328...+1562 °F) Ni100, Ni1000, DIN 43760 -60...+250 °C (-76...+482 °F)
  • Page 53: Analog Input 3 (outside Temperature)

    11. Technical data 11.1.3 Analog input 3 (outside temperature) For resistance thermometers in a 2-wire circuit, with fixed filter time constants (21 h 18 min for weather-dependent setpoint enable) Resistance thermometer Type Measured value range Landis & Staefa Pt1000 -200...+850 °C (-328...+1562 °F) Ni1000, DIN 43760 -60...+250 °C (-76...+482 °F) LG-Ni1000...
  • Page 54: Output 5, Analog Output (option)

    11. Technical data 11.2.4 Output 5, analog output (option) Analog output, electrically isolated from the analog inputs: DU < AC 30 V , DU < DC 50 V Standard signals Load, burden Load = > 500 W DC 0…10 V (short-circuit proof) Burden = <...
  • Page 55: Measuring Accuracy

    11. Technical data 11.3.1 Measuring accuracy Resolution: > 15 bit Measuring accuracy Ambient temperature error Resistance thermometer: £ 0.05 % £ 50 ppm / K Thermocouples: £ 0.25 % £ 100 ppm / K Standard signals: £ 0.1 % £ 100 ppm / K Values include linearization tolerances.
  • Page 56: Current Settings

    12. Actual settings 12.1 Process data Parameter Display Value range Factory Setting setting Setpoint 1 SPL-SPH Setpoint 2 (option) SPL-SPH Digital setpoint shift (optional) SPL-SPH ð Outside temperature (optional) Section 8.1 «C111 inputs» Predefinition of external setpoint SP.E SPL-SPH Setting of the decimal places has an impact on these parameters 12.2 Parameter level Parameter Display...
  • Page 57: Configuration Level

    Landis & Staefa Produktion GmbH Berliner Ring 23 D - 76347 Rastatt Tel. 0049 - 7222 - 598 - 0 Fax. 0049 - 7222 – 598 269 ã 2002 Siemens Building Technologies http://www.landisstaefa.com Subject to change! HVAC Products CC1B7865en 05.12.2002...

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