Siemens RWF40 Series User Manual Download Page 1

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RWF40...
Compact Universal Controller

optimized for temperature and pressure control through the control of modulating or multi-stage burners

User Manual

The RWF40... controller and this User Manual are intended for use by OEMs which integrate the controller into
their products!

CC1B7865E

February 10, 2000

Siemens Building Technologies

Landis & Staefa Division

Summary of Contents for RWF40 Series

Page 1: ...ontrol through the control of modulating or multi stage burners User Manual The RWF40 controller and this User Manual are intended for use by OEMs which integrate the controller into their products CC1B7865E February 10 2000 Siemens Building Technologies Landis Staefa Division ...

Page 2: ...2 56 CC1B7865E February 10 2000 Landis Staefa Division ...

Page 3: ...ng modes 18 Low fire operation 18 High fire operation 18 Modulating burner 3 position output 18 Modulating burner modulating output 19 Two stage burner 3 position output 19 Two stage burner modulating output 20 Safety shutdown 20 Pre defined setpoint 20 Setpoint changeover SP1 SP2 analog setpoint shift 21 Setpoint changeover SP1 external setpoint 22 Setpoint SP1 analog binary setpoint shift 23 Ext...

Page 4: ...andard signal range start analog input 1 45 SCH scaling of standard signal range end analog input 1 45 SCL2 scaling of standard signal range start analog input 2 45 SCH2 scaling of standard signal range end analog input 2 46 SPL lower setpoint limit 46 SPH upper setpoint limit 46 OFF1 actual value correction for analog input 1 46 OFF2 actual value correction for analog input 2 46 OFF3 actual value...

Page 5: ...ner 52 Output 2 3 3 position output 52 Output 4 limit comparator 52 Output 5 modulating output option 53 Transducer supply 53 Interface RS 485 optional 53 General ratings 53 Measured value accuracy 54 Measured value circuit monitoring 54 Environmental conditions 54 Current settings 55 Process data 55 Parameter level 55 Configuration level 56 11 11 1 11 1 1 11 1 2 11 1 3 11 1 4 11 1 5 11 2 11 2 1 1...

Page 6: ...ng temperature or pressure in oil or gas fired heating plants It is a compact 3 position controller without position feedback that acts on the burner An external switch can be used to change it over to a 2 position controller for the control of two stage burners The built in thermostat function switches the burner on and off An adjustable response threshold is used to switch to a higher burner out...

Page 7: ...rs or sections abc Footnote Footnotes are comments referring to specific parts of the text They consist of two parts 1 The markings in the text are arranged as continuous superscript numbers 2 The footnote text is placed at the bottom of the page and starts with a number and a period Action This symbol indicates that a required action is described The individual steps are indicated by an asterisk ...

Page 8: ...ith additional modulating output and RS 485 interface Packing variants The supply voltage connected must match the voltage given on the type field The measured value range and the analog inputs are set at the factory Ö Chapter 8 Configuration Adapter frame ARG40 for plants where the pre decessor model RWF32 was used which shall be converted to the RWF40 Bracket ARG41 for mounting the RWF40 on 35 m...

Page 9: ... as far away as possible from sources of electromagnetic fields such as frequency converters or high voltage ignition transformers Relative humidity 95 non condensing Ambient temperature range 20 50 C Storage temperature range 40 70 C 48 96 91 5 K6 PGM EXIT RWF40 112 Panel cutout to DIN 43700 45 92 0 6 0 8 43 5 127 5 15 5 7865m01e 0200 3 1 Installation site and climatic conditions 3 2 Dimensions ...

Page 10: ...troller housing The unit must be installed with the seal so that no water or oil can penetrate the housing Insert the controller from the front into the panel cutout 7865z08 0200 At the rear of the panel push the fixing elements into the guide slots from the side or top The flat faces of the fixing elements must lie against the housing Place the fixing elements against the rear of the panel and ti...

Page 11: ...pressure cleaners The controller module can be removed from the housing for servicing The rules of DIN EN 100 015 Protection of electrostatically sensitive devices must be adhered to for internal work on the controller No liability will be accepted for damage caused by electrostatic discharge 7865z09 0200 Press the ribbed surfaces together at top and bottom and pull out the controller module 3 5 C...

Page 12: ...erface cables as twisted and screened cables and do not run them close to power cables or components Ground the screening to the controller at one end to the TE terminal Earth the TE terminal of the controller to the protective earth This cable must have a cross sectional area that is at least as large as that of the supply cables Earthing cables must be wired in a star configuration to a common e...

Page 13: ...000 Ni1000 thermocouples or standard signals Input 2 External setpoint setpoint shift for resistance 0 1 k or linearised standard signals Input 3 Outside temperature for Pt1000 Ni1000 For potential free contacts Input 1 Operating mode changeover Input 2 Setpoint shift changeover Output 1 Relay N O contact Output 2 Relay reg unit opens Output 3 Relay reg unit closes Output 4 Relay N O contact DC 24...

Page 14: ...release of burner Contact protection Varistor S07K275 Q14 pole Q13 N O contact Q14 P S Q13 7865a11 1199 Relay 2 regulating unit opens Contact protection RC unit Relay 3 regulating unit closes Contact protection RC unit Y1 N O contact Q common pole Y2 N O contact P S Y1 Q Y2 S P 7865a16 1099 Relay 4 limit comparator Contact protection Varistor S07K275 K6 Q64 pole Q63 N O contact Q64 P S Q63 7865a15...

Page 15: ... input DC 0 20 mA 4 20 mA I1 M1 I1 M1 7865a06 1099 Voltage input DC 0 1 V 0 10 V U1 M1 U1 M1 7865a07 1099 Analog input 2 setpoint and setpoint shift Terminals Connection diagram Resistance potentiometer Offset correction OFF2 XB6 start M6 slider M6 end M6 XB6 A S E 7865a08 1099 Current input DC 0 20 mA 4 20 mA XB6 M6 XB6 M6 7865a09 1099 Voltage input DC 0 1 V 0 10 V XU6 M6 XU6 M6 7865a10 1099 Anal...

Page 16: ...tion Setpoint shift changeover Ö Sections 5 4 1 5 4 4 Common ground D1 D2 GND D1 D2 GND 7865a12 1099 Operating voltage interface Terminals Connection diagram Operating voltage AC 100 240 V 10 48 63 Hz Technical earth L1 line N neutral TE L1 N TE 7865a18 1099 Operating voltage for transducer G G G G DC 24 V 30 mA 7865a14 1099 Serial interface RS 485 CA CB CG RxD TxD RxD TxD GND ...

Page 17: ...andard signals Input 3 Outside temperature for Pt1000 Ni1000 2 binary inputs for potential free contacts D1 operating mode changeover D2 setpoint shift changeover Transducer supply DC 24 V 30 mA short circuit proof Modulating output optional Output 5 Modulating output DC 0 10 V DC 0 20 mA 4 20 mA Serial interface RS 485 optional MOD bus protocol baud rate 9600 Technical earth TE Limit comparator O...

Page 18: ...when an adjustable threshold Q is exceeded A Ö Section 5 6 Response threshold Q In high fire operation depending on the application the burner can be fired in modulating or two stage operation with a larger amount of fuel than in low fire operation The binary input D1 can be used to switch between modulating and two stage operation When the contact is open modulating burner operation When the cont...

Page 19: ...he thermostat function is active In area 2 a two position controller acts on the second stage via relay 2 open and relay 3 close by switching it into the circuit at the switch on threshold HYS1 and out of circuit at the switch off threshold HYS2 q A B q A I II 2 1 W HYS2 HYS1 HYS3 7865w06 1099 In area 3 the actual value exceeds the upper switch off threshold HYS3 and the controller shuts down the ...

Page 20: ...a sensor failure the controller cannot monitor the actual value of the boiler temperature analog input 1 A safety shutdown is automatically carried out to guard against overheating This also applies to the acquisition of the external setpoint at analog input 2 Burner off 3 position output for closing the regulating unit Self setting is ended Manual operation is ended The setpoint is pre selected w...

Page 21: ...shift C111 XXX1 Setpoint changeover C111 XXX0 No function Setpoint SP2 SP2 via buttons C111 X6XX XAXX Analog setpoint shift SPL SPH C111 and C112 are described in chapter 8 Weather dependent setpoint shift No Yes D2 open D2 closed Active setpoint The setpoints SP1 and SP2 are entered at the user level Section 6 2 User level Connection of binary input D2 Section 4 2 Assignment of terminals 7865f05e...

Page 22: ...al setpoint binary setpoint shift C111 XXX1 Setpoint changeover C111 XXX0 No function C111 X1XX X5XX External setpoint SPL SPH C111 and C112 are described in chapter 8 Weather dependent setpoint shift No Yes D2 open D2 closed Active setpoint Setpoint SP1 is entered at the user level Section 6 2 User level Connection of binary input D2 Section 4 2 Assignment of terminals 7865f03e 1199 5 4 2 Setpoin...

Page 23: ...oint changeover C111 XXX2 Binary setpoint shift C111 XXX0 No function C111 X6XX XAXX Analog setpoint shift SPL SPH C111 and C112 are described in chapter 8 Weather dependent setpoint shift No Yes D2 open D2 closed Active setpoint The values dSP and SP1 are entered at the user level Section 6 2 User level Connection of binary input D2 Section 4 2 Assignment of terminals dSP 0 0 7865f04e 1199 5 4 3 ...

Page 24: ...nt shift C111 XXX0 No function C111 X1XX X5XX External setpoint SPL SPH D2 open D2 closed Active setpoint The values dSP and SP1 are entered at the user level Section 6 2 User level Connection of binary input D2 Section 4 2 Assignment of terminals dSP 0 C111 and C112 are described in chapter 8 7865f02e 1199 5 4 4 External setpoint binary setpoint shift ...

Page 25: ... limit SPH Parameter P can be used to apply a parallel displacement to the heating curve Each RWF40 must have its own separate outside sensor connected no parallel connection Ö Chapter 7 Parameter settings 0 20 40 60 80 100 120 140 160 4 3 8 3 6 3 4 3 2 3 2 8 2 6 2 4 2 2 2 1 8 1 6 1 4 1 2 1 0 8 0 6 0 4 0 2 20 17 5 12 5 10 7 5 5 2 5 0 2 5 5 7 5 10 12 5 15 17 5 20 15 7865d02e 1199 Boiler temperature...

Page 26: ...e of the weather adjusted setpoint is restricted by the setpoint limits SPH and SPL Setpoint C Outside temperature C HYS1 20 20 0 H smaller 10 10 SPL SPH H larger HYS3 7865d01e 1199 HYS1 is the switch on point for the burner and HYS3 is the switch off point As already described they act with the set shift relative to the weather controlled setpoint Ö Section 5 2 1 Modulating burner 3 position outp...

Page 27: ...witching threshold HYS1 If the actual value increases integration is stopped If Qeff exceeds the pre set response threshold Q can be adjusted at the parameter level this causes the second stage of the burner to be switched on or in the case of a 3 position controller modulating controller the regulating unit to open If the actual boiler temperature reaches the required setpoint Qeff is set to 0 Te...

Page 28: ...operation as soon as the control deviation x w has dropped below a certain limit value This limit is calculated as follows Limit value 2 HYS1 HYS3 Operating mode modulating 3 position output HYS1 3 K HYS3 5 K w 60 C Limit value 2 3 5 2 8 16 K At an actual value below 44 C the heating up procedure starts immediately in high fire operation instead of in thermostat mode 7865d20 1099 W HYS1 HYS3 t 2 x...

Page 29: ...alue and the parameter values for the various levels The setpoint and the parameters are indicated in the lower setpoint display green BASIC DISPLAY USER LEVEL PARAMETER LEVEL CONFIGURATION LEVEL 1 1 1 Min 2 s Min 2 s Min 2 s or time out approx 30 s 7865f08e 1299 1 After using PGM to step through all the parameters of a level an automatic return occurs after the last parameter has been confirmed A...

Page 30: ...wn here Manual operation self setting the user parameter and configuration levels can be activated from here 503 639 Limit comparator Increase value EXIT button Manual operation 2 stage operation PGM button Regulating unit OPEN 2nd stage Regulating unit CLOSE 1st stage Release of burner Actual value display red Setpoint display green 7865p02e 0200 Decrease value 6 1 Basic display 6 1 1 Meaning of ...

Page 31: ... Section 5 2 High fire operation If there is no action by the operator the controller returns automatically to the basic display after about 30 seconds This level is started from the basic display Setpoints SP1 SP2 dSP can be altered and the analog inputs E2 external setpoint setpoint shift and E3 outside temperature can be displayed To alter SP1 SP2 or dSP Change to the user level with PGM Alter ...

Page 32: ... or 50 0 10 0 PGM Depending on the configuration of binary input 2 dSP Sp2 Measurement of the outside temperature via analog input 3 Measurement of the external setpoint or a setpoint shift via analog input 2 Display depends on code 111 65 0 65 0 60 3 70 0 10 0 SP 1 EXIT SP 2 User level EXIT EXIT 7865f06e 1199 ...

Page 33: ...et to 0 until another entry with the buttons is made Manual operation can only be activated if the thermostat function has set relay 1 to active If the thermostat function sets relay 1 to inactive during manual operation manual operation is terminated Press EXIT for 5 s Press briefly Relay 2 is active relay 3 is inactive Analog output optional delivers DC 10 V The regulating unit opens Or press br...

Page 34: ...lf setting has stopped Accept the parameters that have been determined by pressing press the button for at least 2 s It is not possible to start tunE in manual operation or thermostat operation Press PGM Available units C F and for standard signals PGM 7865z11 1199 6 2 4 Start self setting 6 2 5 Display of the software version and unit of actual value ...

Page 35: ...value by pressing Accept entry by pressing PGM or Cancel entry by pressing EXIT After 2 seconds the value that is set will automatically be accepted The value can only change within the permitted value range Ö Chapter 7 Parameter settings The settings made here are those required for commissioning a specific installation and therefore rarely need to be altered such as acquisition of measured value...

Page 36: ...ching differential at the edges for the limit comparators Ö Chapter 8 2 C112 limit comparator controller type setpoint SP1 locking Proportional band 1 Pb 1 0 1 999 9 digit 10 Affects the P response of the controller Derivative time dt 0 9999 s 80 Affects the D response of the controller Within dt 0 the controller has no D response For modulating controllers dt rt 4 or 0 must be entered Integral ac...

Page 37: ...eshold for burner stage II 1 H Y S 1 0 199 9 digit 5 Ö Section 5 5 1 Heating curve slope Switch off threshold stage II 1 H Y S 2 0 HYS3 digit 3 Ö Section 5 2 High fire operation Upper switch off threshold 1 H Y S 3 0 999 9 digit 5 Ö Section 5 2 High fire operation Response threshold q 0 999 9 0 Ö Section 5 6 Response threshold Q Heating curve slope H 0 4 1 Ö Section 5 5 1 Heating curve slope Paral...

Page 38: ... K A Cu CuNi T b NiCroSil NiSil N C Fe CuNi J d Standard signal DC 0 20 mA E Standard signal DC 4 20 mA F Standard signal DC 0 10 V G Standard signal DC 0 1 V H Analog input 2 No function 0 External setpoint 1 kΩ resistance potentiometer 1 External setpoint DC 0 20 mA 2 External setpoint DC 4 20 mA 3 External setpoint DC 0 10 V 4 External setpoint DC 0 1 V 5 Analog setpoint shift 1 kΩ resistance p...

Page 39: ...p03 0200 Analog input 3 No function 0 Outside sensor Pt1000 2 wire Landis Staefa IEC 751 1 Outside sensor Ni1000 2 wire DIN 43760 2 Outside sensor Ni1000 2 wire Landis Staefa 3 Function of binary input D2 No function 0 Setpoint changeover 1 Setpoint shift binary 2 Factory setting 9 0 3 0 ...

Page 40: ...ulating controller DC 0 20 mA 1 Modulating controller DC 4 20 mA 2 Modulating controller DC 0 10 V 3 Setpoint SP1 SP1 via buttons 0 SP1 with outside sensor analog input 3 must be configured 1 Locking No locking 0 Locking of configuration level 1 Locking of parameter level 2 Locking of buttons 3 Locking of the buttons can be entered only once and adapted with PGM After this all button operations ar...

Page 41: ...YSt w Measured value 7865d10e 0300 Output 4 As for lk1 but with inverted switching function AL HYSt w Measured value 7865d09e 0300 Output 4 HYSt switching differential of the window edges AL interval from setpoint half the window width Lower limit signaling Function relay inactive when measured value setpoint limit value Example w 80 C AL 10 HYSt 2 Measured value rising relay K6 switches on at 71 ...

Page 42: ...Chapter 7 Parameter settings 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 switches off at 91 C Measured value falling relay K6 switches on at 89 C AL HYSt w Measured value 7865d05e 0300 Output 4 As for lk5 but inverted switching function AL HYSt w Measured value 7865d06e 0300 Output 4 Function Ik4 ...

Page 43: ...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 switches off at 49 C AL HYSt Measured value 7865d07e 0300 Output 4 As for lk7 but with inverted switching function AL HYSt Measured value 7865d08e 0300 Output 4 HYSt switching differential AL limit value Ö Chapter 7 Parameter settings Function Ik7 Functi...

Page 44: ...0000 C113 7865p05 0200 Unit address Address 0 0 0 Address 1 0 1 Address 99 9 9 Decimal places dimensional unit No decimal place C 0 One decimal place C 1 No decimal place F 2 One decimal place F 3 Signal for out of range Limit comparators OFF 0 Limit comparators ON 1 Factory setting 0 1 1 0 8 3 C113 instrument address dimensional unit out of range ...

Page 45: ...nds to a measured value of 80 C 0 mA 20 mA 0 C 80 C 100 C Value range 1999 9999 digit Factory setting 100 digit SCL2 20 0 mA corresponds to a measured value of 20 C as already described Value range 1999 9999 digit Factory setting 0 digit 8 3 1 SCL scaling of standard signal range start analog input 1 Example 8 3 2 SCH scaling of standard signal range end analog input 1 Example 8 3 3 SCL2 scaling o...

Page 46: ...ount It is also used for line compensation when resistance thermometers are connected in a 2 wire circuit Value range 1999 9999 digit Factory setting 0 digit Measured value Offset Displayed value 294 7 0 3 295 295 3 0 3 295 Value range 1999 9999 digit Factory setting 0 digit Value range 1999 9999 digit Factory setting 0 digit Value range for filter time constant 0 100 s Factory setting 1 s 8 3 4 S...

Page 47: ...ontroller settings Controller Controlled system Y W X 7865f09e 1199 The tunE function uses two different methods that are automatically selected depending on the dynamic state of the actual value and the difference from the setpoint at the start tunE can be started from within any dynamic actual value sequence If there is a large difference between actual value and setpoint when tunE is activated ...

Page 48: ...stant for actual value filtering that is optimized for this controlled system High fire operation in the modulating burner mode The thermostat function relay 1 must be constantly activated otherwise tunE will be cancelled and no optimized controller parameters will be adapted The above mentioned actual value oscillations during self setting may not exceed the upper threshold of the thermostat func...

Page 49: ...nd their correction The response to a setpoint change is shown here for a 3rd order controlled system for a PID controller The method used for adjusting the controller parameters can however also be applied to other controlled systems A favourable value for dt is rt 4 PB too small PB too large t x w 7865d17 1099 t x w 7865d15 1099 rt dt too small rt dt too large t x w 7865d16 1099 t x w 7865d14 10...

Page 50: ...emperature C111 and the measured value is called up the actual value display red shows 1999 flashing Overrange or underrange on analog input 3 The outside temperature is not being measured The weather dependent setpoint is inactive Check the electrical connections for open circuit of sensors 1999 SP E 7865p09 0200 When analog input 2 is configured C111 and the measured value is called up the proce...

Page 51: ...et correction Type Measured value range Fe CuNi J 200 1000 C NiCr Ni K 200 1372 C Cu CuNi T 200 400 C NiCrSi NiSi N 100 1300 C Cold junction temperature internal Signal Internal resistance Ri Voltage drop Ue DC 0 10 V Ri 2 MΩ DC 0 1 V Ri 2 MΩ DC 0 20 mA Ue 1 V DC 4 20 mA Ue 1 V Sampling time 210 ms Resistance measured value 0 1 kΩ standard signals without linearization With 2 wire circuit R 0 1 kΩ...

Page 52: ...ating analog output optional and a transducer supply are provided as standard Relay output N O contact Contact rating AC 24 240 V 2 A at p f cos ϕ 0 6 Contact life 2 x 105 switching cycles at rated load Internal contact protection Varistor S07K275 2 relay outputs N O contacts with a common pole for regulating unit open close Contact rating AC 24 240 V 2 A at cos ϕ 0 6 Contact life 2 x 105 switchin...

Page 53: ... Galvanic separation between supply voltage analog inputs and outputs Ö Section 4 3 Galvanic separation Weight approx 430 g Data backup EEPROM Operating voltage AC 100 240 V 10 48 63 Hz Power consumption approx 5 VA Electrical connection at the rear via pug in screw terminal strips angled at 45 Electrical safety to EN 60730 Case mounting depth 130 mm plastic body with rear panel self extinguishing...

Page 54: ...ouples X DC 0 10 V DC 0 20 mA DC 4 20 mA X X is not detected X is detected and 1999 appears on the display Ö Chapter 10 What to do if Permissible ambient temperature range 20 50 C short time up to 60 C Permissible storage temperature range 40 70 C Climatic conditions Relative humidity 95 non condensing Degree of protection to EN 60529 Front IP65 Rear IP20 Electromagnetic compatibility EMC To NAMUR...

Page 55: ...it value of limit comparator 1 AL 1999 9999 digit 0 Switching differential for limit comparator 1 HYSt 0 999 9 digit 1 Proportional band 1 Pb 1 0 1 999 9 digit 10 Derivative time dt 0 9999 s 80 Integral action time rt 0 9999 s 350 Contact spacing 1 db 0 999 9 digit 1 Actuator running time tt 10 3000 s 15 s Switch on threshold burner stage II 1 H Y S 1 0 199 9 digit 5 Switch off level stage II 1 H ...

Page 56: ...analog input 2 1 SCL2 0 Measured value range analog input 2 1 SCH2 100 Lower setpoint limit 1 SPL 0 Upper setpoint limit 1 SPH 100 Actual value correction analog input 1 1 OFF1 0 Actual value correction analog input 2 1 OFF2 0 Actual value correction analog input 3 1 OFF3 0 Filter time constant for digital filter analog input 1 dF1 1 1 These parameters are affected by the setting for the decimal p...

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