RWF40... Compact Universal Controller
Contents
1. 11 3 2 Measured value circuit monitoring Probe break Short circuit Resistance thermometer X Thermocouples DC 0 20 mA DC 4 20 mA js not detected EE Neue uM osx pou DC 0 10 V ae ENTERS X is detected and 1999 appears on the display c Chapter 10 What to do if 11 3 3 Environmental conditions Permissible ambient temperature range 20 50 C short time up to 60 C Permissible storage temperature range 40 70 C Climatic conditions Relative humidity lt 95 non condensing Degree of protection to EN 60529 Front IP65 Rear IP20 Electromagnetic compatibility EMC To NAMUR recommendation NE 21 EN 50 081 part 1 EN 50 082 part 2 54 56 CC1B7865E February 10 2000 Landis amp Staefa Division 12 Actual settings 12 1 Process data Parameter Display Value range Factory setting Setpoint 1 EZB SPL SPH Setpoint 2 option SP2 SPL SPH Digital setpoint shift optional C111 Inputs Fre dennition of external setpoint EN SPL SPH These parameters are affected by the setting for the decimal place Outside temperature optional C Section 8 1 12 2 Parameter level Parameter Display Value range Factory setting Limit value of limit comparator 1999 9999 digit rt Switching differential for limit 0 999 9 digit comparator 1 ma soon a Integral action time nl os EN EN Proportional band Derivative time2. I I I i via analog input 2 I l l l L 7865f06e 1199 CC1B7865E Display depends on February 10 2000 or 6 Operation 10 0 dSP Landis amp Staefa Division 6 Operation 6 2 2 Manual operation modulating burner 3 position controller Modulating controller Thermostat mode Press for5s The LED above the hand symbol lights up Change the regulating units position with A and V Relay 2 opens the regulating unit as long as A is pressed Relay 3 closes the regulating unit as long as W is pressed The LEDs for the regulating units indicate if OPEN or CLOSE is activated Change the regulating unit s position with A and V The modulating output delivers the regulating unit s position that was entered Return to automatic operation by pressing for5s When manual operation is activated the regulating unit s position is set 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 6 2 3 Manual operation two stage burner Landis amp Staefa Division Press for5s Press A briefly Relay 2 is active relay 3 is inactive Analog output
3. Heating curve slope Ho os In Section 5 5 1 Heating curve slope Parallel Section 5 5 Weather dependent displacement setpoint shift This parameter is affected by the setting of the decimal place Landis amp Staefa Division CC1B7865E February 10 2000 37 56 8 1 C111 inputs Analog input 1 Pt100 3 wire Pt100 2 wire Ni100 3 wire Ni100 2 wire Pt1000 3 wire Landis amp Staefa IEC 751 Pt1000 2 wire Landis amp Staefa IEC 751 Ni1000 3 wire DIN 43760 Ni1000 2 wire DIN 43760 Ni1000 3 wire Landis amp Staefa Ni1000 2 wire Landis amp Staefa NiCr Ni K Cu CuNi T NiCroSil NiSil N Fe CuNi J Standard signal DC 0 20 mA Standard signal DC 4 20 mA Standard signal DC 0 10 V Standard signal DC 0 1 V Analog input 2 No function External setpoint 1 KQ resistance potentiometer External setpoint DC 0 20 mA External setpoint DC 4 20 mA External setpoint DC 0 10 V External setpoint DC 0 1 V Analog setpoint shift 1 kQ resistance potentiometer Analog setpoint shift DC 0 20 mA Analog setpoint shift DC 4 20 mA Analog setpoint shift DC 0 10 V Analog setpoint shift DC 0 1 V 38 56 CC1B7865E February 10 2000 8 TOA mnnmo ODC oO OO JO Om P GO O Configuration 7865p03 0200 P oo JO om P WN O Landis A Staefa Division 8 Configuration Analog input 3 No function Outside sensor Pt1000 2 wire Landis amp Staefa IE
4. Release of burner L1 N Output 1 Relay N O contact Input 3 Outside temperature for Pt1000 Ni1000 3 position output L1 N Output 2 2 binary inputs Relay reg unit opens for potential free contacts Output 3 D1 operating mode Relay reg unit closes changeover D2 setpoint shift changeover Operating voltage L1 N Transducer supply AC 100 240 V 10 DC 24V 30mA 48 63 Hz short circuit proof Modulating output optional Output 5 Modulating output DC 0 10 V DC 0 20 mA 4 20 mA Max insulation voltages DC 50V Serial interface RS 485 optional AC 400 V MOD bus protocol baud rate 9600 AC 4000 V Technical earth TE 7865f076 1299 Landis amp Staefa Division CC1B7865E February 10 2000 17 56 5 1 Low fire operation Thermostat function 5 Operating modes Low fire operation means that only small amounts of heat are drawn from the boiler A two position controller maintains the setpoint switching the burner on and off like a thermostat This control mode is therefore also known as thermostat function An adjustable switching differential ensures that the switching frequency of the burner can be selected to reduce wear Modulating and 2 stage operation HYS3 Actual value between HYS1 and W Geen HYS3 A v 7865w03 1099 5 2 High fire operation Operating mode changeover
5. HYS1 again If Q is exceeded the controller switches to high fire operation A Section 5 6 Response threshold Q CC1B7865E February 10 2000 Landis amp Staefa Division 5 Operating modes 5 2 2 Modulating burner modulating output In diagram area 1 the thermostat function is active In area 2 the controller is controlling to the adjusted setpoint B 7865w05 1099 1 The positioning signal is delivered as a standard signal via the modulating output Ce The modulating controller must be available and configured in the unit optional C Section 8 2 C112 Limit comparator controller type setpoint SP1 locking 5 2 3 Two stage burner 3 position output In diagram area 1 the 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 B 7865w06 1099 HYS3 HYS2 HYS1 1 In area 3 the actual value exceeds the upper switch off threshold HYS3 and the controller shuts down the burner B The controller only starts low fire operation when the level falls below the switch on level HYS1 again If Q is exceeded the controller switches to high fire operation A Section 5 6 Response threshold Q Landis a
6. optional delivers DC 10 V The regulating unit opens Or press W briefly Relay 2 is inactive relay 3 is active Analog output optional delivers DC 0 V The regulating unit closes Return to automatic operation by pressing for5s Ee If the thermostat function sets relay 1 to inactive during manual operation manual operation is terminated CC1B7865E February 10 2000 33 56 6 Operation 6 2 4 Start self setting k Start self setting with y k Cancel with A zew V PIT 7865z10 1199 When tunE stops flashing self setting has stopped Accept the parameters that have been determined by pressing A press the button for at least 2 s Ee It is not possible to start tunE in manual operation or thermostat operation 6 2 5 Display of the software version and unit of actual value k Press Ml A Available units C F and for standard signals E A 7865211 1199 34 56 CC1B7865E February 10 2000 Landis amp Staefa Division 6 3 Parameter level 6 Operation The parameters involved in the adaptation of 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 E CS The display of the individual parameters depends on the type of controller 6 3 1 Enter parameters The entry and alteration of parameters is made through a conti
7. 25 Heating curve slope e ee ert eec ect ea due gw vue de De E vea Pede eus 26 Response threshold Q eeeeeeeeeseese eee eeeeeeee eene n nnne nhanh nn mnn nnne nnn n nnn 27 Cold start of the plant n iniceniie enarrant accu ianua variu kr naa n oae s ea aai Sa apre n crkRd 28 CC1B7865E February 10 2000 3 56 6 1 6 1 1 6 2 6 2 1 6 2 2 6 2 3 6 2 4 6 2 5 6 3 6 3 1 6 4 6 4 1 8 1 8 2 8 3 8 3 1 8 3 2 8 3 3 8 3 4 8 3 5 8 3 6 8 3 7 8 3 8 8 3 9 8 3 10 9 1 9 2 10 10 1 4 56 KOENEN 29 STE E 30 Meaning of the display and buttons 30 Errare EE 31 Changing the setpoints nennen emnes nennen 31 Manual operation of a modulating hummer 33 Manual operation of a two stage bumer nne 33 StartselEsSetting xiu Sun uet etit tech scatet con ios ionic 34 Display of the software version and unit of actual value sssssessssressssreesrrrrressrresene 34 Parameter level 5 erae ives snnnctntecdendebendensuarcceedeueadenstuscededeatcuisceutses 35 Enter parameters ette tti tte ta e rta P qe Ute 35 Configuration level 5 32252 5 AE 2 ires esae ees 35 Changing the configuration code 35 Parameter settings iee re rre biad EEN expen eere so ddia baniwa 36 Configuration errat i rana ea add nr anre eaa qui ad e E e dx ra 38 UTA AMAputeus e a A ura Ep d a e uU ODE 38 C112 limit comparator controller type setpoint SP1 lockin
8. DIN 46277 Dummy cover AVA10 200 109 for covering a control panel cutout for the RWFAO 8 56 CC1B7865E February 10 2000 Landis amp Staefa Division 3 Installation 3 1 Installation site and climatic conditions The installation site should be as free as possible from vibrations dust and corrosive media The controller should be installed as far away as possible from sources of electromagnetic fields such as frequency converters or high voltage ignition transformers Relative humidity 95 96 non condensing Ambient temperature range 20 50 C Storage temperature range 40 70 C 3 2 Dimensions 7865m01e 0200 Landis amp Staefa Division CC1B7865E February 10 2000 9 56 3 Installation 3 3 Side by side If several controllers are mounted side by side or above one another in a control panel the minimum spacing must be observed namely 30 5 mm vertically and 10 5 mm horizontally 3 4 Mounting in a panel cutout k Place the seal provided onto the controller housing d 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 K Place the fixing elements against the rear of the panel
9. OFF2 M6 slider M6 end 7865a08 1099 Current input XB6 0 DC 0 20 mA 4 20 mA M6 o 7865a09 1099 Voltage input XU6 O DC 0 1 V 0 10 V M60 7865a10 1099 Analog input 3 outside temperature Connection diagram Resistance thermometer in 2 wire circuit line B9 compensation through offset correction OFF3 tt M9 7865a13 1099 Landis amp Staefa Division CC1B7865E February 10 2000 15 56 4 Electrical connections Binary inputs Connection diagram Operating mode selector C Section 5 2 High fire operation Setpoint shift changeover C Sections 5 4 1 5 4 4 Operating voltage AC 100 240 V 10 96 48 63 Hz Technical earth Operating voltage for transducer Serial interface RS 485 16 56 CC1B7865E L1 line N neutral N O TE 7865a18 1099 G O DC 24 V 30 mA G 7865a14 1099 RxD TxD RxD TxD GND February 10 2000 Landis amp Staefa Division 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 Actual value Output 4 for Pt100 Ni100 Relay N O contact Pt1000 Ni1000 thermocouples or standard signals Input 2 External setpoint setpoint shift for resistance 0 1kQ or standard signals
10. and tighten them evenly with a screwdriver 10 56 CC1B7865E February 10 2000 Landis amp Staefa Division 3 Installation 3 5 Cleaning the front panel The front panel can be cleaned with normal washing and rinsing agents or detergents It is not resistant to corrosive acids caustic solutions and abrasive cleaners or cleaning with high pressure cleaners 3 6 Removing the controller module 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 Ate accepted for damage caused by electrostatic discharge 7865z09 0200 K Press the ribbed surfaces together at top and bottom and pull out the controller module Landis amp Staefa Division CC1B7865E February 10 2000 11 56 4 1 Installation notes Safety regulations Fusing A Interference suppression Incorrect use 4 Electrical connections The choice of cable the installation and the electrical connections of the controller must conform to the regulations of VDE 0100 Regulations for the installation of power circuits with nominal voltages below AC 1000 V or appropriate local regulations The electrical connections may only be carried out by qualified personnel If contact with live parts is possible while working on the unit the controller must be disconnec
11. for the limit comparators Chapter 8 2 C112 limit comparator controller type setpoint SP1 locking 0 1 999 9 digit Affects the P response of the controller SE 0 9999 s 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 Proportional band Derivative time Integral action time 0 9999 s Affects the I response of the controller With rt 0 the controller has no I response Contact spacing 0 999 9 digit dead band For 3 position output Y db 100 100 7865d11 1099 This parameter is affected by the setting of the decimal place 36 56 CC1B7865E February 10 2000 Landis amp Staefa Division 7 Parameter settings The parameter is shown on the lower setpoint display green and the value on the upper actual value display red Parameter Display Value range Factory setting Actuator running 10 3000 s 15s Utilized running time of the valve for time 3 position controllers Switch on threshold H Y S 1 0 199 9 digit 5 Section 5 5 1 Heating curve slope for burner stage II Switch off threshold HY S2 0 HYS3 digit 3 c Section 5 2 High fire operation stage II Upper switch off HYS3 0 999 9 digit 5 C Section 5 2 High fire operation threshold Response threshold 0 999 9 Section 5 6 Response threshold Q
12. is set at 20 C 20 C The effective range of the weather adjusted setpoint is restricted by the setpoint limits SPH and SPL H larger Setpoint C HYS3 SP TUER EE di PS H smaller Outside temperature C 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 Section 5 2 1 Modulating burner 3 position output C Section 5 2 2 Modulating burner modulating output CC1B7865E February 10 2000 Landis amp Staefa Division 5 Operating modes 5 6 Response threshold Q Landis amp Staefa Division The response threshold Q defines how long and how low the actual value can drop before the system switches over to high fire operation An internal mathematical calculation using an integration function determines the sum of all the areas Qer Q1 Q2 Q3 as shown in the diagram This only takes place when the control deviation x w falls below the value for the switching threshold HYS1 If the actual value increases integration is stopped If Qer 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 s
13. sensor C111 and C112 are e Le described in chapter 8 Heating curve slope H Setting 0 0 4 0 Weather dependent setpoint shift No Yes C112 XX0X O C112 XX1X SP1 via outside sensor C111 XXX2 c Section 5 4 4 Exter C111 XXX1 C111 XXX0 nal setpoint binary setpoint shift Setpoint changeover No function Q Setpoint SP2 SP2 via buttons D2 closed C111 X6XX XAXX Analog setpoint shift The setpoints SP1 and SP2 are entered at the user level c Section 6 2 User level SPL Connection of binary input D2 c Section 4 2 Assignment of terminals 7865f05e 1199 Active setpoint Landis amp Staefa Division CC1B7865E February 10 2000 21 56 5 4 2 Setpoint changeover SP1 external setpoint 22 56 Ee C111 and C112 are described in chapter 8 5 Operating modes C1 11 XX1X XX3X Ou tside sensor Y Heating curve slope H Setting 0 0 4 0 Weather dependent O setpoint shift No Yes C112 XX0X O C112 XX1X P C111 X1XX X5XX External setpoint O 3 C111 XXX2 No function C111 XXX0 C111 XXX1 Setpoint changeover setpoint shift c Section 5 4 4 Exter nal setpoint binary D2 closed Setpoint
14. 1 2 4 Output 5 modulating output option 11 Technical data Continuous output electrically isolated from the analog inputs AU lt AC 30 V AU lt DC 50 V Standard signals Load burden DC 0 10 V short circuit proof Load gt 500 Q DC 0 20 mA Burden lt 500 Q DC 4 20 mA Burden lt 500 Q Accuracy 0 25 96 50 ppm K 11 2 5 Transducer supply DC 24 V 30 mA short circuit proof 11 2 6 Interface RS 485 optional Baud rate Protocol Unit address 9600 MOD bus 1 99 Galvanic separation between supply voltage analog inputs and outputs Section 4 3 Galvanic separation 11 3 General ratings Weight Data backup Operating voltage Power consumption Electrical connection Electrical safety Case Landis amp Staefa Division CC1B7865E approx 430 g EEPROM AC 100 240 V 10 48 63 Hz approx 5 VA at the rear via pug in screw terminal strips angled at 45 to EN 60730 mounting depth 130 mm plastic body with rear panel self extinguishing flammability class UL94 VO seal between case and control panel February 10 2000 53 56 11 Technical data 11 3 1 Measured value accuracy Resolution gt 15 bit Measured value accuracy Ambient temperature error Resistance thermometer lt 0 05 50 ppm K Thermocouples lt 0 25 96 lt 100 ppm K Standard signals lt 100 ppm K The values include the linearization tolerances
15. 1000 DIN 43760 60 250 C Ni1000 from Landis amp Staefa 50 160 C Sampling time 6 s 11 1 4 Binary input D1 Potential free contact for operating mode changeover Modulating burner when the contact is open LED on the front is not lit 2 stage burner when the contact is closed LED on the front is lit 11 1 5 Binary input D2 Potential free contact for the following functions depending on the configuration No function Setpoint shift Setpoint changeover 11 2 Outputs 4 relay outputs 1 modulating analog output optional and a transducer supply are provided as standard 11 2 1 Output 1 release of burner Relay output N O contact Contact rating AC 24 240 V 2 A at p f cos gt 0 6 Contact life gt 2 x 10 switching cycles at rated load Internal contact protection Varistor S07K275 11 2 2 Output 2 3 3 position output 2 relay outputs N O contacts with a common pole for regulating unit open close Contact rating AC 24 240 V 2A at cos gt 0 6 Contact life gt 2 x 10 switching cycles at rated load Internal contact protection RC combination C 2 5 nF R 100 Q 11 2 3 Output 4 limit comparator Relay output N O contact Contact rating AC 24 240 V 2A at cos gt 0 6 Contact life gt 2 x 10 switching cycles at rated load Internal contact protection Varistor S07K275 52 56 CC1B7865E February 10 2000 Landis amp Staefa Division 1
16. C 751 Outside sensor Ni1000 2 wire DIN 43760 Outside sensor Ni1000 2 wire Landis amp Staefa 0 1 2 3 Function of binary input D2 No function 0 Setpoint changeover 1 Setpoint shift binary 2 Factory setting Landis amp Staefa Division CC1B7865E February 10 2000 39 56 8 Configuration 8 2 C112 limit comparator controller type setpoint SP1 locking Limit comparator No function Ik off Ik1 input 1 Ik2 input 1 Ik3 input 1 Ik4 input 1 Ik5 input 1 Ik6 input 1 Ik7 input 1 Ik8 input 1 Ik7 input 2 Ik8 input 2 Ik7 input 3 Ik8 input 3 0 1 2 3 4 5 6 7 8 9 A b G Controller type 3 position controller Modulating controller DC 0 20 mA Modulating controller DC 4 20 mA Modulating controller DC 0 10 V W N O Setpoint SP1 SP1 via buttons 0 SP 1 with outside sensor analog input 3 must be configured 1 Locking No locking Locking of configuration level Locking of parameter level Locking of buttons d Locking of the buttons can be entered only once and adapted with E After this all button operations are locked and can only be enabled again by the manufacturer Factory setting WN CH 40 56 CC1B7865E February 10 2000 Landis amp Staefa Division 8 Configuration Function Ik1 Window function relay K6 is active when the measured value lies within a window around the setpoint w Example w 80 C AL 5 HYSt 2 Measured value r
17. Contact spacing BEN EM Actuator running time Switch on threshold burner 0 199 9 digit stage II Switch off level stage II Upper switch off threshold a p os pue EN BEES 90 90 These parameters are affected by the setting for the decimal place Response threshold Parallel displacement Landis amp Staefa Division CC1B7865E February 10 2000 55 56 12 3 Configuration level Parameter Analog input 1 2 and 3 setpoint changeover shift Limit comparator controller type setpoint 1 locking Unit address decimal place unit signal for out of range Measured value range start analog input 1 Measured value range analog input 1 Measured value range analog input 2 Measured value range analog input 2 Lower setpoint limit Upper setpoint limit Actual value correction analog input 1 Actual value correction analog input 2 Actual value correction analog input 3 Filter time constant for digital filter analog input 1 Display C111 C112 C113 SCH2 OFF3 12 Actual settings setting BUD These parameters are affected by the setting for the decimal place 2000 Siemens Building Technologies AG 56 56 CC1B7865E February 10 2000 Siemens Building Technologies AG Landis amp Staefa Division Berliner Ring 23 D 76347 Rastatt Tel 0049 7222 598 0 Fax 0049 7222 53182 http www landisstaefa com Landis
18. High fire operation means that large amounts of heat are drawn from the boiler so that the burner is on all the time If the heating load during the thermostat operation rises to a level where the actual value begins to fall below the switch on threshold HYS1 the controller does not immediately switch over to a higher burner output but first makes a dynamic test of the control deviation and only switches to the higher output when an adjustable threshold Q is exceeded A C Section 5 6 Response threshold Q n 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 contact is closed two stage burner operation 5 2 1 Modulating burner 3 position output 18 56 In diagram area 1 the thermostat function is active The modulating mode of burner operation is shown in area 2 In high fire operation a 3 position controller acts on an actuator through relay 2 open and relay 3 close B 7865w07 1099 HYS3 HYS1 1 2 3 In area 3 the actual value exceeds the upper switch off threshold HYS3 and the controller switches off the burner B The controller only starts low fire operation when the level falls below the switch on threshold
19. N O contact Transducer supply DC 24 V 30 mA short circuit proof Modulating output optional Output 5 gt Modulating output DC 0 10 V DC 0 20 mA DC 4 20 mA Serial interface optional RS 485 lt p MOD bus protocol Baud rate 9600 February 10 2000 13 56 4 Electrical connections 4 3 Assignment of terminals Electrical connections may only be made by qualified personnel Relay 1 release of burner Q14 pole Contact protection Varistor SO7K275 Q13 N O contact 7865a11 1199 Relay 2 regulating unit opens Y1 N O contact Contact protection RC unit Q common pole Relay 3 regulating unit closes Contact protection RC unit Y2 N O contact 7865a16 1099 Relay 4 limit comparator Contact protection Varistor S07K275 Q63 N O contact 7865a15 1099 Modulating output optional X1 O DC 0 4 20 mA 0 2 10 V X1 7865a17 1099 14 56 CC1B7865E February 10 2000 Landis amp Staefa Division 4 Electrical connections Analog input 1 actual value Connection diagram uu Resistance thermometer in 3 wire circuit I1 7865a04 1099 Resistance thermometer in 2 wire circuit line compensation through offset correction OFF 1 7865a05 1099 Current input DC 0 20 mA 4 20 mA M10 7865a06 1099 Voltage input U1o0 DC 0 1 V 0 10 V Mi 7865a07 1099 Resistance potentiometer XB6 start Offset correction
20. PGM to step through all the parameters of a level an automatic return occurs after the last parameter has been confirmed Landis amp Staefa Division CC1B7865E February 10 2000 29 56 6 Operation 6 1 Basic display The diagram shows the RWF40 after switching on power 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 6 1 1 Meaning of the display and buttons Release of burner Regulating unit CLOSE 1st stage Regulating unit OPEN 2nd stage 2 stage operation Actual value display red Setpoint display Manual operation green Limit comparator Decrease value Increase value PGM button EXIT button 7865p02e 0200 30 56 CC1B7865E February 10 2000 Landis amp Staefa Division Initialization Manual operation Self setting function Actual value display flashes 2 stage operation Time out 6 2 User level 6 2 1 Changing the setpoints Landis amp Staefa Division 6 Operation All displays are lit up the setpoint display flashes for about 10 seconds after switching on power The actual value is indicated on the upper display 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 gre
21. SIEMENS RWFAO 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 Siemens Building Technologies CC1B7865E Landis amp Staefa Division February 10 2000 2 56 CC1B7865E February 10 2000 Landis amp Staefa Division Contents 1 1 1 1 2 1 3 1 3 1 1 3 2 1 3 3 2 1 3 1 3 2 3 3 3 4 3 5 3 6 4 1 4 2 4 3 4 4 5 1 5 2 5 2 1 5 2 2 5 2 3 5 2 4 5 3 5 4 5 4 1 5 4 2 5 4 3 5 4 4 5 5 5 5 1 5 6 5 7 Landis amp Staefa Division Dette lloro ro PC EE 6 General notes 6 Descriptio ett 6 Typographical conventions eeeeeeeeeeeeeeeeeeeeeeee eene nnne nennt nnn nenne nnn nnn innen 7 Warning sSymbols te tet ete tige petet tetex e tust cnt ite eet cte en RERE 7 Notification symbols e nee I etu ENNEN waite 7 Presentatlon coi ec mp eiie ee ee no ic tte fius 7 Typ of UIC ncc MM EE 8 BUDE 8 Installa fo p tL 9 Installation site and climatic conditions eeeeeeeeeeeeeennnnneen 9 BILD IAE 9 E E E Tu Tu dl e DEE 10 Mounting in a panel cutout EEN 10 Cleaning the front panelini annonas ede ege guden GEES cv aad nna c aae rk a
22. SP1 is entered at the user level c Section 6 2 User level Connection of binary input D2 c Section 4 2 Assignment of terminals CC1B7865E February 10 2000 d SPH SPL 7865f03e 1199 Y Active setpoint Landis amp Staefa Division 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 No Yes C112 XX1X SP1 via outside sensor C112 XX0X O SP1 via buttons pn 1 C111 XXX1 c Sections 5 4 1 and 5 4 2 Setpoint changeover C111 XXX0 No function D2 closed dSP 0 0 D2 open SPH The values dSP and SP1 are entered at the user level c Section 6 2 User level SPL 7865f04e 1199 Connection of binary input D2 c Section 4 2 Assignment of terminals Active setpoint Landis amp Staefa Division CC1B7865E February 10 2000 23 56 5 4 4 External setpoint binary setpoint shift 24 56 C111 and C112 are L described in chapter 8 5 Operating modes C111 X1XX X5XX External setpoint C111 XXX1 C111 XXX2 c Sections 5 4 1 and 5 4 2 Binary setpoint shift CUNT ARO Setpoin
23. Temperature 52 Binary Input DIPS oea 2h ice cocco cuite Eee ee ENS 52 GET delen RE 52 lf Cae PUR PE E 52 Output 1 release of buert 52 Output 2 3 3 positlon Output sve o D ENARRARE Tees 52 Output 4 limit comparator ssssssssssseeeeeeeneemennnenneeeeennmrre nennen 52 Output 5 modulating output option 53 Transducer suppl 53 Interface RS 485 optional iam eer ete e daas 53 General EU E 53 Measured value accuracy nem enne nnnnnnnerrnn enn n enhn nnne nnne 54 Measured value circuit monitoring ssssennn nmm 54 Environmental conditions sseessssssseseeeeeeeeeeeeen nennen nennen nnne nnn 54 Gurr nt Settings oo cpeo tco cepe Co ie cbe Ce ues Ces Coke ud teca eot E CE Ee Me E C ER D NEL 55 Process data tent tenete feet tdeo terere 55 Parameter level eerte eere eee een etes 55 Configuratio N 31 1 e C 56 CC1B7865E February 10 2000 5 56 1 1 General notes A 1 2 Description Use Control Options 6 56 L d Ae 1 Introduction Please read this User Manual before starting up the controller Keep the Manual in a place that is accessible to all users at all times Please help us improve the Manual Your suggestions will be welcome All necessary settings and where required settings inside the unit are described in this User Manual for controller software version 126 01 01 Section 6 2 5 Display software version and dimensiona
24. aa cabs ascateetess 11 Removing the controller module eese eene 11 Electrical connections eeeeeeeeeeceeeeeeee eene 12 Installation notes 2 olei recen ie Na aiaa aaeain EENS EEN 12 Block diagram iei erreur ere nne treten e ere anre to conce e P corre P Ponte Eeer 13 Assignment of terminals 52 2 2 ieri iane cta ie panne aa ca cu siena aano aes Ga saa s aea an Pc diatik 14 GalVanic Separation 252 coniu nain aao eeh ege gt e EY ege Se eege See oe eebe Sg 17 Operating MOG Siesta eua eoe eor ue rate tee cete ue a ial ecu te 18 Eow fire opetatiOn iiie EEN an are ura cana EENEG Reeder 18 High fire Operation EE 18 Modulating burner 3 position output ssssssssseeee nennen 18 Modulating burner modulating oufput reenn ennnen nnne nennen ennnen 19 Two stage burner 3 position oufput e 19 Two stage burner modulating output ee 20 Safety SHUtdOWN E 20 Pre defined Setpoint iconic ncc eeee setate te cea tas ck suse Deka kan DE y R as D Ra anRcrae 20 Setpoint changeover SP1 SP2 analog setpoint shift cccsccceccceeeesssssteeeeeeees 21 Setpoint changeover SP1 external seipoint 22 Setpoint SP1 analog binary setpoint hitt 23 External setpoint binary setpoint shift 24 Weather dependent setpoint shift cssecceeeseeeeeeeeeeeeeeeeeeeeeseeeeeeesneeeeeseeeeeeeeaeees
25. amp Staefa Division
26. 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 This symbol indicates that a required action is described The individual steps are indicated by an asterisk e g Press the A button Buttons are shown in a box Either symbols or text are possible If a button has multiple assignments the text shown is always the one that corresponds to the function currently used The representation of buttons combined with a plus sign means that first the button must be pressed and held down and then the other button CC1B7865E February 10 2000 7 56 2 Type of unit 2 1 Type field Location The type field is glued onto the housing The type designation consists of operating voltage and type reference of the unit RWF40 000A97 Basic version with 3 position output RWF40 010A97 RWF40 001A97 With additional modulating output RWF40 011A97 RWF40 002A97 With additional modulating output and RWF40 012A97 RS 485 interface 1 Packing variants d The supply voltage connected must match the voltage given on the type field Factory setting The measured value range and the analog inputs are set at the factory Chapter 8 Configuration Accessories 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 mm DIN rails conforming to
27. circuit of sensor Landis amp Staefa Division 11 Technical data 11 1 Inputs 11 1 1 Analog input 1 actual value For resistance thermometers thermocouples or standard signals with 2 4 order digital filter configurable Resistance thermometers In 2 wire or 3 wire circuit Measured value range Pt100 Pt1000 200 850 C Ni100 Ni1000 DIN 43760 60 250 C Ni1000 from Landis amp Staefa 50 160 C Line resistance lt 30 Q Line compensation Not required for a 3 wire circuit When using a resistance thermometer in a 2 wire circuit line compensation can only be made by means of the offset correction Thermocouples Cold junction temperature internal DEET drop Alle IDC0 10V O 0 10 V R 2 R 2MQ Sampling time 210 ms 11 1 2 Analog input 2 external setpoint setpoint shift Resistance measured value 0 1 KQ standard signals without linearization Potentiometer With 2 wire circuit R 0 1 kQ Standard signals Internal resistance Ri Voltage drop AUe DC 0 10 V R 2 MQ DC 0 20 mA DC 4 20 mA Sampling time 630 ms Landis amp Staefa Division CC1B7865E February 10 2000 51 56 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 the weather dependent setpoint enable Resistance thermometer Measured value range Pt1000 200 850 C Ni
28. d actual value oscillations during self setting may not exceed the upper threshold of the thermostat function increase if necessary and lower the setpoint 48 56 CC1B7865E February 10 2000 Landis amp Staefa Division 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 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 X X t t 7865d17 1099 7865d15 1099 rt dt too small rt dt too large X X f t t 7865d16 1099 7865d14 1099 Optimum adjustment 7865d 18 1099 Landis amp Staefa Division CC1B7865E February 10 2000 49 56 10 1 numbers are flashing on the display 10 What to do if This is an indication that a measured value is not being acquired correctly Le The detection of measured value range crossings depends on the type of sensor used Section 11 3 2 Measured value circuit monitoring Display Description Cause controller behavior remedy 7865p09 0200 7865p07 0200 Actual value di
29. ded and its switching behavior can be set on the configuration level A selection can be made between eight different limit comparator functions An RS 485 interface is used for integration into a data network Output 5 can be used as a modulating output for modulating or 2 stage operation All connections are made via screw terminals at the rear of the unit CC1B7865E February 10 2000 Landis amp Staefa Division 1 Introduction 1 3 Typographical conventions 1 3 1 Warning symbols A A Ae Danger Caution Caution 1 3 2 Notification symbols L abc Note Reference Footnote Action 1 3 3 Presentation PGM EXIT TA Buttons Button combi nations Landis amp Staefa Division The signs for Danger and Caution are used in this Manual under the following conditions This symbol is used where there may be a danger to personnel if the instructions are disregarded or not strictly followed This symbol is used where there may be damage to equipment or data if the instructions are disregarded or not strictly followed This symbol is used if pre cautions must be taken in handling electrostatically sensitive components This symbol is used to draw your special attention to a remark This symbol refers to additional information in other Manuals chapters or sections Footnotes are comments referring to specific parts of the text They consist of two parts 1 The markings in the text are
30. en Section 6 2 2 Manual operation of a modulating burner The actual value is shown on the actual value display red and the text tunE flashes on the setpoint display green Section 9 1 Self setting function in high fire operation Chapter 10 What to do if Section 5 2 High fire operation If there is no action by the operator the controller returns automatically to the L ed 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 X Alter the setpoint SP1 with W and A K Change to setpoint SP2 or dSP with k Alter the setpoint SP2 or dSP with W and A Return to the basic display with or automatically by time out after about 30 s After 2 seconds the value that is set will automatically be adopted The value can only change within the permitted value range CC1B7865E February 10 2000 31 56 32 56 User level code 111 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 I I I I I I l l I l l l l I I l l l l l l l l l I
31. etpoint Qer is set to O Temperature C 7865d19e 1199 Q 0 Actual value monitoring ensures that the switching frequency is kept low in the transitional range from low to high fire operation in order to reduce wear CC1B7865E February 10 2000 27 56 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 fall To achieve a faster control response the controller starts immediately in high fire 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 Example 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 28 56 CC1B7865E February 10 2000 Landis amp Staefa Division 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 indicates the actual value and the parameter values for the various levels The setpoint and the parameters are indicated in the lower setpoint display green BASIC DISPLAY EN or time out approx 30 s CONFIGURATION LEVEL PGM 7865f08e 1299 After using
32. g 40 C113 unit address dimensional unit out ot range nnne 44 SCL scaling of standard signal range start analog Input 45 SCH scaling of standard signal range end analog input 7 45 SCL2 scaling of standard signal range start analog input 3 45 SCH2 scaling of standard signal range end analog input 3 46 SPL lower setpoint lbid ectetur cc tepida endete t eR Er ad LC 46 SPH uppersetpoiht liis iacere Doe eS rae MEUS 46 OFF1 actual value correction for analog input 7 46 OFF2 actual value correction for analog input 3 46 OFF3 actual value correction for analog input 3 46 dF1 2 order digital filter for analog input 1 46 Self setting functl n eniro enun xad rh pa n icr n 47 Self setting function in high fire operation eese 47 Checking the controller parameters esses nennen 49 What iode og nep 50 humbers are flashing on the display essere 50 CC1B7865E February 10 2000 Landis amp Staefa Division 11 11 1 11 1 1 11 1 2 11 1 3 11 1 4 11 1 5 11 2 11 2 1 11 2 2 11 2 3 11 2 4 11 2 5 11 2 6 11 3 11 3 1 11 3 2 11 3 3 12 12 1 12 2 12 3 Landis amp Staefa Division Technical data EE 51 let 51 Analog input 1 actual value sssssssesseeeeeeeeeneeee nennen nnn nnn 51 Analog input 2 external setpoint Setpoint shift essen 51 Analog input 3 outside
33. hing function Output 4 A E AEN I HYSt l l i i D T865d06e 0300 a Measured value 42 56 CC1B7865E February 10 2000 Landis amp Staefa Division 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 gt 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 Output 4 A HYSt madii orn AL Measured value Function Ik8 As for Ik7 but with inverted switching function Output 4 HYSt 7865d08e 0300 HYSt switching differential AL limit value C Chapter 7 Parameter settings Landis amp Staefa Division CC1B7865E AL Measured value February 10 2000 43 56 8 3 C113 instrument address dimensional unit out of range d Unit address Address 0 Address 1 Address 99 Decimal places dimensional unit No decimal place C One decimal place C No decimal place F One decimal place F Signal for out of range Limit comparators OFF Limit comparators ON The setting for the decimal place affects actual value dependent parameters 8 Configuration 0000 C113 is 7865p05 00 0 0 0 1 9 9 W N O Factory setting 44 56 CC1B7865E February 10 2000 Landis amp Staefa Division 8 Co
34. ising relay K6 switches on at 76 C and off at 86 C Measured value falling relay K6 switches on at 84 C and off at 74 C Output 4 Measured value 7865d10e 0300 Ww Function Ik2 As for Ik1 but with inverted switching function Output 4 s Measured value 7865d09e 0300 Ww HYSt switching differential of the window edges AL interval from setpoint half the window width Function Ik3 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 C Measured value falling relay K6 switches off at 69 C Output 4 A HYSt Measured value 7865d04e 0300 Landis amp Staefa Division CC1B7865E February 10 2000 41 56 8 Configuration Function Ik4 As for IK3 but with inverted switching function Output 4 Measured value 7865d03e 0300 w HYSt switching differential AL interval from setpoint gt Chapter 7 Parameter settings Function Ik5 Upper limit signaling Function relay inactive when measured value gt 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 Output 4 A E i i i I mee EEUU e Measured value Function Ik6 As for Ik5 but inverted switc
35. l unit Should any difficulties arise during commissioning you are asked not to carry out any unauthorized manipulations on the unit You could endanger your rights under the unit warranty Please contact us in such a case When returning modules assemblies or components to Landis amp Staefa the regulations of DIN EN 100 015 Protection of electrostatically sensitive devices must be observed Use only the appropriate ESD packaging for transport Please note that we cannot accept any liability for damage caused by ESD ESD electrostatic discharge The RWFAO is used primarily for controlling 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 output high fire operation A shift controller controls the temperature or pressure Minimum and maximum limits for the setpoint can be set A self setting function is available as a standard feature The plug in controller module measures 96 x 48 x 127 5 mm and is especially suited for mounting in control panels The controller incorporates two 4 digit 7 segment displays for the actual value red and setpoint green A limit comparator is also provi
36. mp Staefa Division CC1B7865E February 10 2000 19 56 5 Operating modes 5 2 4 Two stage burner modulating 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 B 7865w04 1099 The modulating controller must be available and configured in the unit optional L C Section 8 2 C112 Limit comparator controller type setpoint SP 1 locking 5 3 Safety shutdown Functions In the event of 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 5 4 Pre defined setpoint 20 56 The setpoint is pre selected with the buttons or the interface within pre set limits It is possible to shift the setpoint by either an analog or a binary signal to influence it according to the weather or to change it with an external contact CC1B7865E February 10 2000 Landis amp Staefa Division 5 Operating modes 5 4 1 Setpoint changeover SP1 SP2 analog setpoint shift C111 XX1X XX3X Outside
37. nfiguration 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 Value range 1999 9999 digit Factory setting O digit 8 3 2 SCH scaling of standard signal range end analog input 1 Example SCH 80 SCL 0 C 20 mA end corresponds to a measured value of 80 C Value range 1999 9999 digit Factory setting 100 digit 8 3 3 SCL2 scaling of standard signal range start analog input 2 Example SCL2 20 0 mA corresponds to a measured value of 20 C as already described Value range 1999 9999 digit Factory setting O digit Landis amp Staefa Division CC1B7865E February 10 2000 45 56 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 value that is set Value range 1999 9999 digit Factory setting 0 digit 8 3 6 SPH upper setpoint limit The controller restricts the setpoints to the value that is set Value range 1999 9999 digit Factory setting 100 digit 8 3 7 OFF1 actual value correction for analog input 1 The actual value correction can be used for correction of the measured value upwards or downward
38. nuous alteration of the value The longer you keep the button pressed the faster the rate of change becomes Increase value by pressing A Reduce value by pressing V Accept entry by pressing or Cancel entry by pressing After 2 seconds the value that is set will automatically be accepted The value can only change within the permitted value range C Chapter 7 Parameter settings 6 4 Configuration level 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 or type of controller Within the level you can proceed to the next parameter by pressing E 6 4 1 Changing the configuration code Select position by pressing V position flashes k Alter value by pressing A Accept code by pressing or EXIT Cancel entry by pressing EU Chapter 8 Configuration Landis amp Staefa Division CC1B7865E February 10 2000 35 56 7 Parameter settings The parameter is shown on the lower setpoint display green and the value on the upper actual value display red Parameter Limit value for limit comparator Display um range Factory setting 1999 9999 digit lr Measured value c Chapter 8 2 C112 limit comparator controller type setpoint SP1 locking Switching differential 0 999 9 digit for limit comparator 1 Switching differential at the edges
39. of the following process or lead to damage Safety devices that are independent of the controller such as overpressure relief valves or temperature limiters monitors should therefore always be provided and only be capable of adjustment by qualified personnel Please observe the appropriate safety regulations Since self setting cannot be expected to handle all possible control loops the stability of the actual value that is produced should be checked The analog inputs of the controller may not exceed a maximum voltage of AC 30 V or DC 50 V against TE Section 4 3 Galvanic separation 12 56 CC1B7865E February 10 2000 Landis amp Staefa Division 4 2 Block diagram Landis amp Staefa Division 3 analog inputs Input 1 Actual value for Pt100 Ni100 Pt1000 Ni1000 thermocouples or standard signals Input 2 gt External setpoint setpoint shift for resistance 0 1 kQ or linearised standard signals Input 3 Outside temperature for Pt1000 Ni1000 2 binary inputs For potential free contacts Input 1 Operating mode changeover Input 2 Setpoint shift changeover Operating voltage AC 100 240 V 10 96 48 63 Hz 7865f016 0200 CC1B7865E 4 Electrical connections Release of burner Output 1 Relay N O contact 3 position output Output 2 Relay reg unit opens Output 3 Relay reg unit closes Limit comparator Output 4 Relay
40. s by a specific amount 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 Example Measured value Offset Displayed value 294 7 0 3 295 295 3 0 3 295 8 3 8 OFF2 actual value correction for analog input 2 Value range 1999 9999 digit Factory setting 0 digit 8 3 9 OFF3 actual value correction for analog input 3 Value range 1999 9999 digit Factory setting 0 digit 8 3 10 dF1 2 order digital filter for analog input 1 Value range for filter time constant 0 100 s Factory setting 1 s 46 56 CC1B7865E February 10 2000 Landis amp Staefa Division 9 Self setting function 9 1 Self setting function in high fire operation Two procedures Landis amp Staefa Division Ee tunE is only possible in high fire operation in the modulating burner mode The self setting function tunE is a pure software function unit that is integrated into the controller In the modulating mode of operation tunE tests the response of the controlled system to steps of the positioning signal according to a special procedure A complex control algorithm uses the response of the controlled system actual value to calculate and store the control parameters for a PID or PI controller set dt 0 The tunE procedure can be repeated as often as required Self setting Start Identification of
41. splay red shows 1999 flashing Setpoint display shows the setpoint When analog input 3 is configured for outside temperature C111 and the measured value is called up the actual value display red shows 1999 flashing When analog input 2 is configured C111 and the measured value is called up the process value display red shows 1999 flashing Actual value display red shows XXXXXX Setpoint display green shows 1999 flashing 50 56 CC1B7865E February 10 2000 Overrange or underrange on analog input 1 The actual value is not being measured Controller initiates lockout Section 5 3 Safety shutdown The limit comparator responds to analog input 1 according to the configuration C113 Check the electrical connections for open circuit of sensor 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 Overrange or underrange on analog input 2 The external setpoint is not being measured Controller initiates lockout Section 5 3 Safety shutdown Check the electrical connections for open circuit of sensors Overrange or underrange on analog input 2 The setpoint shift is not being measured Controller initiates lockout Section 5 3 Safety shutdown Check the electrical connections for open
42. t changeover No function D2 closed dSP oF 0 D2 open SPH The values dSP and SP1 are entered at the user level c Section 6 2 User level SPL Connection of binary input D2 c Section 4 2 Assignment of terminals 7865f02e 1199 CC1B7865E February 10 2000 Active setpoint Landis amp Staefa Division 5 Operating modes 5 5 Weather dependent setpoint shift Parallel displacement of the heating curve Landis amp Staefa Division The RWFAO can be configured in such a way that if a Landis amp Staefa Ni1000 outside sensor e g QAC22 is connected a weather dependent setpoint shift is implemented The minimum and maximum setpoint values can be set by the lower setpoint limit SPL and the upper setpoint limit SPH Parameter P can be used to apply a parallel displacement to the heating curve d Each RWF40 must have its own separate outside sensor connected no parallel connection C Chapter 7 Parameter settings 160 4 3 8 140 i 34 3 2 120 3 9 28 26 v amp o E 100 24 e 9 SPH 22 o go XE 3 3 80 18 9 g 1 6 5 1 4 60 1 2 a 1 ao SPL 0 8 40 0 6 0 4 0 2 20 0 L Ng Outside temperature C CC1B7865E February 10 2000 25 56 5 5 1 Heating curve slope 26 56 5 Operating modes 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
43. ted from the power supply at both poles An internal current limiting resistor interrupts the supply voltage in the event of a short circuit The external fusing should not be rated above 1 A slow The output relays must be fused for a maximum of 2 A to prevent contact welding in the event of a short circuit in the load circuit Section 11 2 Outputs No other loads may be connected to the supply terminals of the controller The electromagnetic compatibility and interference suppression levels conform to standards and regulations listed under Technical data cC Chapter 11 Technical data Input output and supply cables should be routed separately not parallel to one another Arrange sensor and interface 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 earthing point connected to the protective earth of the supply Earthing cables may not be looped from one controller to another The unit is not suitable for installation in areas with an explosion hazard Incorrect settings on the controller setpoint data of parameter and configuration levels can affect the proper functioning
44. the controlled system PID controller settings Controlled system 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 a switching line is established around which the controlled variable performs forced oscillations during the self setting procedure The switching line is set at such a level that the actual value should not exceed the setpoint Switching level 7865d12e 1199 With a small deviation between setpoint and actual value for instance when the controlled system has stabilized a forced oscillation is performed around the setpoint CC1B7865E February 10 2000 47 56 9 Self setting function 7865d13 1099 t The controlled system data which are 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 Conditions 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 mentione
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