Siemens RWF 50.2 Installation, Use And Maintenance Instructions
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Siemens RWF 50.2 Installation, Use And Maintenance Instructions

Compact universal controllers
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Installation, use and maintenance instructions
Compact universal controllers
GB
MODEL
Kit RWF 50.2
20089337 (2) - 05/2015

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Summary of Contents for Siemens RWF 50.2

  • Page 1 Installation, use and maintenance instructions Compact universal controllers MODEL Kit RWF 50.2 20089337 (2) - 05/2015...
  • Page 2 Translation of the original instructions 20089337...
  • Page 3 RWF50.2 and RWF50.3 Compact universal controllers Optimized for temperature and pressure control in connection with modulating or multistage burners and air conditioning systems User Manual The RWF50.2/RWF50.3 and this User Manual are intended for use by OEMs which integrate the controllers in their products! Caution! All safety, warning and technical notes contained in the Data Sheet on the...
  • Page 4 2/68 20089337...
  • Page 5 Supplementary documentation Data Sheet RWF50....................N7866 Environmental Declaration RWF50.................E7866 3/68 20089337...
  • Page 6 4/68 20089337...

  • Page 7: Table Of Contents

    Contents Introduction...................... 8 General notes ....................8 Typographical conventions................9 1.2.1 Safety notes..................... 9 1.2.2 Warning symbols ..................... 9 1.2.3 Notification symbols..................10 1.2.4 Presentation ....................10 Description..................... 11 Block structure....................12 Identification of product no................13 Type field ....................... 13 Scope of delivery ...................
  • Page 8 Meaning of display and buttons ..............32 Basic display ....................33 User level .......................34 Manual control, modulating burner ..............35 Manual control, 2-stage burner ..............36 Starting the self-setting function..............37 Display of software version ................38 Parameterization PArA..................39 Configuration ConF..................41 Analog input InP1...................42 Controller Cntr....................43 Thermal shock protection (TSS) rAFC ............44 Control outputs OutP..................45 Binary input binF ....................46...
  • Page 9 12.1.1 Resistance thermometers................56 12.1.2 Input signals ....................56 12.1.3 Binary input D1 ....................56 12.2 Monitoring the measuring circuit..............57 Controller outputs OutP Controller o.............. 57 12.3 12.4 Controller ....................... 57 12.5 Electrical data ....................58 12.6 Housing ......................58 12.7 Environmental conditions ................

  • Page 10: Introduction

    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. Version!  This User Manual describes all necessary settings (applicable to controller software version XXX.01.01).

  • Page 11: Typographical Conventions

    The controller may only be used on the applications described in the technical documentation and only in connection with devices or components from other suppliers that have been approved or recommended by Siemens. The product can only function correctly and safely if shipped, stored, set up and installed correctly, and operated and maintained as specified.

  • Page 12: Notification Symbols

    1.2.3 Notification symbols  This symbol is used to draw your special attention to a Note remark.  This symbol refers to additional information in other Reference documents, chapters or sections. abc¹ Footnotes are comments, referring to specific parts of Footnote the text.

  • Page 13: Description

    1.3 Description The RWF50... is used primarily for the control of temperature or pressure in oil- or gas- Use in heating plants fired heating plants. Depending on the model, it is employed as a compact 3-position controller without feedback of angular positioning or as a modulating controller with an analog output.

  • Page 14: Block Structure

    1.4 Block structure Only RWF50.2: Air damper control Only RWF50.3: Figure 1: Block structure 12/68 20089337...

  • Page 15: Identification Of Product No

    Identification of product no. 2.1 Type field The type field is glued onto the housing. The arrow below indicates the product no. Location Example  Attention! Mains supply must correspond to the operating voltage given on the type field. Product no. Description Product nos.

  • Page 16: Installation

    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: 95% (noncondensing) Ambient temperature: -20...50 °C Storage temperature: -40...70 °C...

  • Page 17: Side-By-Side Mounting

    3.3 Side-by-side mounting If several controllers are mounted side-by-side or above one another in a control panel, the horizontal distance between panel cutouts must be a minimum of 11 mm and the vertical distance a minimum of 50 mm. 3.4 Mounting the controller in a panel cutout Remove the frame Fit the seal supplied with the controller ...

  • Page 18: Removing The Controller From The Panel Cutout

    3.5 Removing the controller from the panel cutout  Attention! When removing the controller, make certain that all cables are disconnected and that they do not get squeezed between control panel and housing. 3.6 Cleaning the front The front of the controller can be cleaned with normal washing/rinsing agents or detergents.

  • Page 19: Electrical Connections

    Electrical connections 4.1 Installation notes - The choice of cable, installation and electrical connections of the controller must Safety regulations 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 personnel - If contact with live parts is possible while working on the unit, the controller must be disconnected from power supply (all-polar disconnection)

  • Page 20: Galvanic Separation

    4.2 Galvanic separation The illustration shows the maximum test voltages between the electrical circuits. Analog input For resistor thermometer standard signals Binary input For potential-free contacts Setup USB interface For PC software ACS411 Burner release 1P, 1N Buttons Relay (NO contact) Power supply measuring transducer Power consumption...

  • Page 21: Assignment Of Terminals

    4.3 Assignment of terminals Caution! Electrical connections must always be made by qualified personnel! 7866z09/0911 Figure 5: Assignment of terminals Outputs Display LED Terminal no. Connection diagram pole Relay Burner release: Relay K1: P, 1N NO contact 7866a01/0911 NO contact Only RWF50.2 3-position output: common pole...
  • Page 22 InP1 Analog input Connection diagram Terminal no. Resistance thermometer in 3-wire circuit Resistance thermometer in 2-wire circuit Current input DC 0...20 mA, 4...20 mA 7866a06/0911 Voltage input DC 0...5 V, 1...5 V, 0...10 V 7866a06/0911 Binary inputs binF Terminal no. Connection diagram Binary input D1 Common ground DG...

  • Page 23: Operating Modes

    Operating modes 5.1 Low-fire operation Low-fire operation means that only small amounts of heat are drawn from the boiler. Using relay K1 Burner release, the 2-position controller ensures control to the setpoint by switching the burner on and off like a thermostat. This mode of control is known as the thermostat function.

  • Page 24: High-Fire Operation

    5.2 High-fire operation High-fire operation means that large amounts of heat are drawn from the boiler so that the burner runs continuously. If the heating load during low-fire operation rises to a level where the actual value begins to fall below switch-on threshold HYS1 , the controller will not immediately switch to a higher burner output, but first makes a dynamic test of the control deviation and switches to the higher output only when an adjustable threshold (q) is exceeded (A).

  • Page 25: Modulating Burner, Analog Output

    5.2.2 Modulating burner, analog output Only RWF50.3 Thermostat function active. Area (1) The RWF50.3 as a modulating controller provides control to the adjusted setpoint. Area (2) Angular positioning is ensured via the analog output in the form of a standard signal. 7866d06/0911 Figure 9: Control sequence of modulating burner, analog output The controller behaves as described in chapter 5.2.1 Modulating burner, 3-position...

  • Page 26: 2-Stage Burner, 3-Position Output

    5.2.3 2-stage burner, 3-position output In area (1), the thermostat function is active. In area (2), the RWF50.2 as a 2-position Only RWF50.2 controller acts on the second stage via relay K2 (OPEN) and relay K3 (CLOSE) by switching on at switch-on threshold HYS1 and switching off at switch-off threshold HYS2. 7866d07/0911 Figure 10: Control sequence of 2-stage burner, 3-position output In area (3), the actual value exceeds the upper switch-off threshold HYS3 and the...

  • Page 27: 2-Stage Burner, Analog Output

    5.2.4 2-stage burner, analog output In this case, a digital standard signal switches the second stage on via the analog Only RWF50.3 output (terminals A+ and A-) when reaching switch-on threshold HYS1 and off at the lower switch-off threshold HYS2. 7866d08/0911 Figure 11: Control sequence of 2-stage burner, analog output If the controller is set to cooling mode, the respective values of HYS4, HYS5 and HYS6...

  • Page 28: Burner Shutdown

    5.3 Burner shutdown In the event of a sensor failure at the analog input InP1, the controller cannot monitor the actual value. Burner shutdown will automatically be triggered to guard against overheating. - Burner off Functions - 3-position output for closing the controlling element - Self-setting function is ended - Manual control is ended 26/68...

  • Page 29: Predefined Setpoint

    5.4 Predefined setpoint The setpoint is predefined within the selected setpoint limits via the buttons or the ACS411 software. Using an external contact, the setpoint can also be shifted or changed over.  Reference! See chapter 8.5 Binary functions binF. Setpoint changeover Depending on the function selected for the binary input, the effective controller setpoint or setpoint shift...

  • Page 30: Response Threshold (Q)

    5.5 Response threshold (q) The response threshold (q) defines for what period of time and how much 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 areas qeff = q1 + q2 + q3 as shown in the graph.

  • Page 31: Cold Start Of Plant

    5.6 Cold start of plant  Note! Interlocking Functions Cold start of plant and Thermal shock protection (TSS) are interlocked. Only one function can be activated, but never both at the same time. When a heating system is switched off for a longer period of time, the actual value will Heating controller drop of course.
  • Page 32 Cold start of plant also works when the RWF50… is used as a cooling controller. Cooling controller In that case, the limit value is calculated as follows: Limit value = 2 x (HYS4-HYS6) Example Operating mode: Modulating 3-position output HYS4 = 5 K HYS6 = -5 K w = -30 °C Limit value = 2 x (5 +5) = 2 x (10) = +20 K...

  • Page 33: Thermal Shock Protection (Tss)

    5.7 Thermal shock protection (TSS)  Note! Interlocking Functions Cold start of plant and Thermal shock protection (TSS) are interlocked. Only one function can be activated, but never both at the same time. The controller comes with thermal shock protection (TSS) deactivated; it can be activated at the configuration level.

  • Page 34: Operation

    Operation 6.1 Meaning of display and buttons Burner release Operating mode 2-stage Actual value display (red) and parameter value USB-LED Controlling element CLOSE Setpoint display (green) and parameter symbol Controlling element OPEN Enter button ESC button Enter Decrease value RWF50.x Increase value 7866z03e/0212 Figure 16: Meaning of display and buttons...

  • Page 35: Basic Display

    6.2 Basic display When switching power on, the displays show hyphens for about 5 seconds. RWF50.X 7866z11/0112 Figure 17: Display start The state that follows is called normal display. Default display is the actual value and the current setpoint. Other values can be displayed at the configuration level or via PC software ACS411. ...

  • Page 36: User Level

    6.3 User level This level is started from the basic display. Setpoints SP1, SP2 or dSP can be altered. Changing the setpoints so that OPr appears From the basic display, press so that SP1 appears Press and SP1 flashes Press Press to adjust the required setpoint and press to confirm...

  • Page 37: Manual Control, Modulating Burner

    6.4 Manual control, modulating burner  Note! Manual control can only be activated if the thermostat function energized relay K1. If the thermostat function deenergized relay K1 during manual control, manual control is ended. Press for 5 seconds HAnd appears on the lower display, alternating with the value for manual control. RWF50.2 Open and close fuel-air ratio control by pressing 3-position controller...

  • Page 38: Manual Control, 2-Stage Burner

    6.5 Manual control, 2-stage burner Press for 5 seconds Press briefly RWF50.2 RWF50.3 Relay K2 is active The analog output delivers the highest value Relay K3 is inactive (depending on setting DC 10 V or 20 mA) Controlling element opens Or press briefly RWF50.2...

  • Page 39: Starting The Self-Setting Function

    6.6 Starting the self-setting function Start Press for 5 seconds Cancel Cancel with 7866z04/0911 Figure 19: Display of self-setting function When tUnE stops flashing, the self-setting function has been ended. The parameters calculated by the controller are automatically adopted!  Note! It is not possible to start tUnE in manual control or low-fire operation.

  • Page 40: Display Of Software Version

    6.7 Display of software version Press 7866z05/0911 Figure 20: Display of software version Segment test Press again. RWF50.X 7866z12/0112 Figure 21: Display segment test All display segments and LEDs light up; the actual value display (red) flashes for about 10 seconds. 38/68 20089337...

  • Page 41: Parameterization Para

    Parameterization PArA Here, set the parameters associated directly with the controller’s adaptation to the controlled system after the plant has been put into operation.  Note! The display of the individual parameters depends on the type of controller. Basic display Enter Enter User level OPr...
  • Page 42 Display of controller parameters The parameters are shown on the lower setpoint display (green) and their values on the upper/actual value display (red). Factory Parameter Display Value range Remarks setting Proportional band ¹ 1...9999 digit Influences the controller’s P-action Influences the controller’s D-action Derivative time 0...9999 s With dt = 0, the controller has no D-action...

  • Page 43: Configuration Conf

    Configuration ConF Here, the settings (e.g. acquisition of measured value or type of controller) required directly for commissioning a certain plant are made and, for this reason, there is no need to change them frequently. Basic display Enter Enter User level OPr (editable) InP1 or (only display)

  • Page 44: Analog Input Inp1

    InP1 8.1 Analog input An analog input is available. ConF  InP  InP1  Parameter Value/ Description selection Sensor type Resistance thermometer Pt100, 3-wire Resistance thermometer Pt100, 2-wire SEn1 Sensor type Resistance thermometer Pt1000, 3-wire Resistance thermometer Pt1000, 2-wire Resistance thermometer LG-Ni1000, 3-wire Resistance thermometer LG-Ni1000, 2-wire 0...135 Ohm...

  • Page 45: Controller Cntr

    8.2 Controller Cntr Here, the type of controller, operating action, setpoint limits and presettings for self- optimization are selected. ConF  Cntr  Parameter Value/ Description selection 3-position controller (RWF50.2) Controller type Modulating controller (RWF50.3) CtYP Controller type Operating action Heating controller Cooling controller CACt...

  • Page 46: Thermal Shock Protection (Tss) Rafc

    8.3 Thermal shock protection (TSS) rAFC The RWF50… can be operated as a fixed value controller with or without ramp function. ConF  rAFC  Parameter Value/ Description selection Function Switched off Gradient Kelvin/minute FnCt Function Gradient Kelvin/hour  Note! With FnCt = 1 or 2, Thermal shock protection (TSS) is automatically activated as soon as the actual value drops below the adjustable absolute limit value rAL (heating controller) or...

  • Page 47: Control Outputs Outp

    8.4 Control outputs OutP With the RWF50.2, configuration of the outputs relates to the binary outputs (K2 and K3), and with the RWF50.3, to the analog outputs (A+ and A-). The burner is released via relay K1. The switching states of relay K1 Burner release (LED green), relay K2 Controlling element OPEN, and relay K3 Controlling element CLOSE (yellow LED arrows) are indicated on the controller front.

  • Page 48: Binary Input Binf

    8.5 Binary input binF This setting decides on the use of the binary input.  Reference! See chapter 5.4 Predefined setpoint. ConF  binF  Parameter Value/ Description selection Binary input No function Setpoint changeover bin1 Binary inputs Setpoint shift Changeover of operating mode Burner modulating: Contacts D1 and DG open...

  • Page 49: Display Disp

    8.6 Display diSP By configuring the position of the decimal point and automatic changeover (timer), both tout LED indications can be adapted to the respective requirements. Timeout operation and the locking of levels can be configured as well. ConF  dISP  Parameter Value/ Description...

  • Page 50: Self-Setting Function

    Self-setting function 9.1 Self-setting function in high-fire operation  Note! tUnE is only possible in high-fire operation, in modulating burner mode. Self-setting function tUnE is a proper software function unit integrated in the controller. In modulating mode, tUnE tests in high-fire operation the response of the controlled system to angular positioning steps according to a special procedure.
  • Page 51 The tUnE function uses 2 different methods that are automatically selected depending 2 procedures on the dynamic state of the actual value and the deviation from the setpoint at startup. tUnE can be started from within any dynamic actual value sequence. If there is a great difference between actual value and setpoint when tUnE is activated, a switching line is established about which the controlled variable performs forced oscillations during the self-setting process.

  • Page 52: Checking The Controller Parameters

    9.2 Checking the controller parameters 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 3rd order controlled system for a PID controller.

  • Page 53: Pc Software Acs411

    10 PC software ACS411 PC software ACS411 is an operating module for use with the RWF50… universal controller and designed for the following basic tasks:  Visualization of system state covering the following data: - Parameters - Process data - Configuration and parameterization of the controller (individual parameters) - Saving and restoration of parameter sets A USB cable can be used to establish the connection between PC (USB plug type A, 4 pins) and RWF50...

  • Page 54: Place Of Installation

    10.4 Place of installation Caution! PC software ACS411 is designed for use on site, that is, within viewing and hearing distance of the respective combustion plant. This means that remote control is not permitted. 10.5 License and liability regulations Note! ...

  • Page 55: Installation

    10.10 Installation  Note! First, install PC software ACS411; then, connect the controller. If not observed, an error message is delivered. PC software ACS411 is supplied on a CD. Insert CD in the CD or DVD drive. Setup starts automatically. Follow the instructions appearing on the screen.

  • Page 56: Others

    10.11 Others 10.11.1 Use of USB port : Use of The USB port is intended for temporary use to make the parameter settings, the configuration and for work in connection with commissioning. When using the USB port, the controller can be securely operated, tested and set with no need for using the mains cable.

  • Page 57: What To Do If

    11 What to do if ... 11.1 Alarm messages Display Cause Remedy 9999 flashing Check to see if sensor and Measured value exceeded limit The measured value is too great, connecting line are damaged or lies outside the measuring range, have a short-circuit or the sensor is faulty ...

  • Page 58: Technical Data

    Technical data 12.1 Inputs 12.1.1 Resistance thermometers Type Measuring Measuring Impact of range accuracy ambient temperature 0.1% Pt100; DIN EN 60751 -200...850 °C 50 ppm/K (-328...1562 °F) 0.1% Pt1000; DIN EN 60751 -200...850 °C 50 ppm/K (-328...1562 °F) 0.1% LG-Ni1000 -50...+160 °C 50 ppm/K (-58...320 °F)

  • Page 59: Monitoring The Measuring Circuit

    12.2 Monitoring the measuring circuit In the event of error, the outputs assume defined states (configurable). Measuring Measured value Sensor/line has Sensor/line transducer crossed limit short-circuit interrupted ● ● ● Resistance thermometer ● ● ● Voltage 1...5 V (●) 0...5 V, 0...10 V ●...

  • Page 60: Electrical Data

    12.5 Electrical data Power supply (switching network section) AC 110...240 V +10/-15% 48...63 Hz Electrical safety To DIN EN 60730, part 1 Overvoltage category II Degree of contamination 2 Power consumption Max. 16 VA Data backup EEPROM Electrical connection At the rear via screw terminals - Cross-sectional area 0.25...1.5 mm²...

  • Page 61: Environmental Conditions

    12.7 Environmental conditions DIN IEC 60721-3-1 Storage Climatic conditions Class 1K3 Mechanical conditions Class 1M2 Temperature range -40...70 °C Humidity <95% r.h. DIN IEC 60721-3-2 Transport Climatic conditions Class 2K2 Mechanical conditions Class 2M2 Temperature range -40...70 °C Humidity <95% r.h. DIN IEC 60721-3-3 Operation Climatic conditions...
  • Page 62 60/68 20089337...

  • Page 63: Key

    Switch-on point for high-fire when response threshold (q) is reached Switch-off point for burner Binary input 1 bin1 Binary input binF Operating action CACt Controller Cntr Level lockout CodE Configuration ConF Controller type CtYP Dead band Decimal point dECP Filter time constant Lower display diSL Display...
  • Page 64 Setpoint reached, thermal shock protection (TSS) no longer active Tolerance band of ramp toLP Timeout tout Running time of controlling element Unit of temperature Unit Setpoint Angular positioning 62/68 20089337...

  • Page 65: List Of Figures

    14 List of figures Figure 1: Block structure....................12 Figure 2: Dimensions of RWF50..................14 Figure 3: Mounting in a panel cutout ................15 Figure 4: Test voltages ....................18 Figure 5: Assignment of terminals .................19 Figure 6: Control sequence of heating controller............21 Figure 7: Control sequence of cooling controller ............21 Figure 8: Control sequence of modulating burner, 3-position output......22 Figure 9: Control sequence of modulating burner, analog output .........23 Figure 10: Control sequence of 2-stage burner, 3-position output ........24...
  • Page 66 64/68 20089337...
  • Page 67 Index Cooling controller ..........11 Correct use ............9 ACS411 Changing the parameters ......... 51 Description ............11 Installation............53 General notes ............8 Languages............52 Mounting.............11 License and liability regulations ...... 52 Notification symbols .........10 Others ..............54 Presentation ............10 PC software ACS411 ......... 51 Qualified personnel ..........9 Place of installation...........
  • Page 68 Timeout ..............34 Self-setting function in high-fire operation ..48 User level ............34 Technical data............56 Parameterization Binary input D1..........56 Display of controller parameters ......40 Controller ............57 Parameterization PArA ..........39 Controller outputs OutP........57 Electrical data............ 58 PC software ACS411 Measuring accuracy ..........54 Environmental conditions ........
  • Page 72 Manufactured by RIELLO S.p.A. I-37045 Legnago (VR) Tel.: +39.0442.630111 http:// www.riello.it http:// www.riello.com Subject to modifications...

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