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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!
CC1U7866en
25.07.2014
Caution!
All safety, warning and technical notes contained in the Data Sheet on the
RWF50... (N7866) also apply to this document!
Building Technologies Division
Infrastructure & Cities Sector
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Table of Contents
Related Manuals for Siemens RWF50.3
Summary of Contents for Siemens RWF50.3
- Page 1 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 RWF50…...
- Page 2 2/64 Building Technologies Division User Manual RWF50... CC1U7866en Infrastructure & Cities Sector 25.07.2014...
- Page 3 Supplementary documentation Data Sheet RWF50....................N7866 Environmental Declaration RWF50................. E7866 3/64 Building Technologies Division User Manual RWF50... CC1U7866en Infrastructure & Cities Sector Introduction 25.07.2014...
- Page 4 4/64 Building Technologies Division User Manual RWF50... CC1U7866en Infrastructure & Cities Sector 25.07.2014...
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Page 5: 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 ....................... - Page 6 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 ..................
- Page 7 12.1.1 Resistance thermometers ................55 12.1.2 Input signals ....................55 12.1.3 Binary input D1 ....................55 12.2 Monitoring the measuring circuit ..............56 Controller outputs OutP Controller o .............. 56 12.3 12.4 Controller ....................... 56 12.5 Electrical data ....................57 12.6 Housing ......................
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Page 8: 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 9: 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 10: 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 11: Description
(green). The RWF50.2 has a 3-position output consisting of 2 relays to open or close a controlling element. The RWF50.3 has an analog output. In modulating mode, the RWF50... operates as a PID controller. In 2-stage mode, the Control RWF50... -
Page 12: Block Structure
1.4 Block structure Only RWF50.2: Air damper control Only RWF50.3: Figure 1: Block structure 12/64 Building Technologies Division User Manual RWF50... CC1U7866en Infrastructure & Cities Sector 1 Introduction 25.07.2014... -
Page 13: 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 14: 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 15: 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 16: 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 17: 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 18: Galvanic Separation
Power consumption G+, G- Max. 16 VA at AC 110...240 V, DC 24 V 10%/max. 25 mA +10%/-15%, 48...63 Hz (short-circuit-proof) Only RWF50.3 Analog output A+, A- 7866d02e/1212 DC 50 V AC 1500 V AC 3300 V Figure 4: Test voltages... -
Page 19: Assignment Of Terminals
3-position output: common pole Relay K3: Controlling element CLOSE Relay K2: Controlling element OPEN NO contact 7866a02/0911 Only RWF50.3 Analog output A+, A- DC 0(4)...20 mA, DC 0...10 V 7866a03/0911 19/64 Building Technologies Division User Manual RWF50... CC1U7866en Infrastructure & Cities Sector 4 Electrical connections 25.07.2014... - Page 20 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...
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Page 21: 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 22: 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 23: 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 24: 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 25: 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. -
Page 26: 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 26/64... -
Page 27: 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 28: 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 29: 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 30 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...
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Page 31: 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 32: 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 33: 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 34: User Level
6.3 User level This level is started from the basic display. Setpoints SP1, SP2 or dSP can be altered. The values of InP (analog input) and Y (current angular positioning between 0...100%) can be displayed. Changing the setpoints so that OPr appears From the basic display, press Enter so that SP1 appears... -
Page 35: Manual Control, Modulating Burner
Relay K3 closes the controlling element as long as is kept depressed. The 2 yellow arrows indicate when relay K2 opens or relay K3 closes the controlling element. RWF50.3 Change angular positioning by pressing Modulating controller Adopt flashing new angular positioning by pressing Enter Per default, the analog output delivers the current angular positioning. -
Page 36: 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... -
Page 37: 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 38: Display Of Software Version
6.7 Display of software version Press Enter 7866z05/0911 Figure 20: Display of software version Segment test Press again. Enter 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. -
Page 39: Parameterization Para
Controller: down rAFC Thermal shock protection: Enter binF Binary inputs: diSP Display: Only RWF50.3 OutP Controller outputs: Next/previous parameter Figure 22: Parameterization Access to this level can be locked. Reference! See chapter 8.6 Display diSP. so that OPr appears... - Page 40 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...
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Page 41: Configuration Conf
One level Cntr Controller: down rAFC Thermal shock protection: Enter binF Binary inputs: diSP Display: Only RWF50.3 OutP Controller outputs: Next/previous parameter Figure 23: Configuration Access to this level can be locked. Reference! See chapter 8.6 Display diSP. Note! The following tables show the default settings in columns Value/selection and Description in bold printing. -
Page 42: 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 43: 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 Control direction 7866d14/0512 (0) = cooling controller: The controller’s angular positioning (Y) is >0 when the actual value... -
Page 44: 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 45: 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 46: 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 47: 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 48: 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 49 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.
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Page 50: 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 51: 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 52: 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 53: 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 54: 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 55: 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 56: Monitoring The Measuring Circuit
Max. 1 A at AC 250 V at cosφ >0.6 Contact life 100,000 switching cycles at high-fire Contact protection RC unit Relay data are those specified by the supplier. Only RWF50.3 Analog output A+, A- Voltage DC 0...10 V short-circuit-proof ≥500 Load resistance Last 0.25%, 50 ppm/K... -
Page 57: Electrical Data
Degree of protection To DIN EN 60529 Front side IP66 Rear IP20 Weight (Fully equipped) - RWF50.2 Approx. 170 g - RWF50.3 Approx. 168 g 57/64 Building Technologies Division User Manual RWF50... CC1U7866en Infrastructure & Cities Sector 12 Technical data... -
Page 58: 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 59: 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 60 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 60/64 Building Technologies Division User Manual RWF50... CC1U7866en Infrastructure & Cities Sector 13 Key 25.07.2014...
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Page 61: 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 ............ - Page 62 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 ..............
- Page 63 Timeout ..............34 Self-setting function in high-fire operation ..48 User level ............34 Technical data ............55 Parameterization Binary input D1 ..........55 Display of controller parameters ......40 Controller ............56 Parameterization PArA ..........39 Controller outputs OutP ........56 Electrical data ............
- Page 64 Siemens AG Infrastructure & Cities Sector Building Technologies Division © 2014 Siemens AG Infrastructure & Cities Sector Berliner Ring 23 Building Technologies Division D-76437 Rastatt Subject to change! Tel. +49 7222 598 279 Fax +49 7222 598 269 www.siemens.com 64/64 Building Technologies Division User Manual RWF50…...