Master-slave switchover application
Contents
1. Current control is included and torque control is also possible without field weakening The current control application differs only in that the field control range of the motor field weakening is not utilized and the motor torque is proportional to the armature current of the complete speed range The required parameter changes p50169 p50170 can be found in the List Manual e Align the master and slaves so that they always operate at the same speeds e Using external interlocks it must be ensured that a controller enable of the slaves is always realized together with the associated master drive this means that only after all of the line contactors have pulled in that their auxiliary contacts connected in series energize terminal X177 13 of the master drive Master slave switchover application C98130 A7066 A503 01 7619 03 2011 3 3 Master slave drives for rigidly coupled motors 3 1 Application e Inthe case of two or several coupled motors the master drive is operated closed loop speed controlled e The slave drives operate with closed loop current control or closed loop torque control and receive their current setpoint or torque setpoint speed actual value as well as control word 1 from the master drive via the peer to peer connection e For example a gearbox with two or more inputs 3 2 Recommended circuit We only recommend the circuit shown in the following for rigidly coupled motors The assignment of the connec2. Siemens AG The warranty conditions specified in the contract between the parties are the only warranty conditions accepted by the DT Drive Technologies Division Any statements contained herein neither create new warranties nor modify the existing warranty A warning The units listed here contain dangerous electric voltages dangerous rotating machine parts fans and control rotating mechanical parts drives Failure to follow the relevant Operating Instructions may result in death serious injury or extensive material damage Technical Support You can also find help for technical issues through our Technical Support www siemens de automation support request German www siemens com automation support request English 2 Applications This document deals with the interaction between two or more SINAMICS DCM units for various technological requirements Closed loop current control e For two or more coupled machines that are operated in the armature control range e Also when switching over between master and slave drives Torque control e Fortwo or more coupled machines which are also operated in the field weakening range e Also when switching over between master and slave drives Droop e For two or more uncoupled machines connected to the same load with the same master setpoint CAUTION e The following information always refers to the application Torque control since here the application
3. between Mmax and Mmax therefore setting the torque the same as the torque of the master In this operating mode if there is mistakenly no rigid mechanical connection between the master and slaves then the speed of the slaves only increases by the overcontrol value as then their own speed controller intervenes The external speed setpoint is connected to G1 to G4 at X177 25 26 whereby for each drive that is the master then its own ramp function generator is active If required the speed of drives G2 to G4 can be separately influenced using nsuppiat X177 27 28 In order that each drive can be separately switched on this must be realized individually for each drive using an external control e g at terminals X177 12 13 see the operating instructions 5 4 2 Parameter settings G1 to G4 p50081 1 Field weakening possible p50083 2 Operation with incremental encoder p50169 0 Torque control p50170 1 Torque control p50430 0 53010 07 input torque setpoint p50430 1 53010 06 Input of a fixed setpoint for n closed loop control p50431 0 52601 Torque setpoint from the previous master p50431 1 52002 Torque enable for n closed loop control p50605 0 52204 p50621 52017 Torque setpoint Overcontrol setpoint for the n controller Set this parameter for all of the drives except the first drive G1 The factory setting is kept for the first drive p50644 52011 Speed
4. the overcontrol value as then the speed controller intervenes The intervention of nsuppi is suppressed 4 4 2 Separate operation Coupling Ku1 is open The speed setpoint Nnset is connected at G1 to terminal X177 25 26 and is transferred via the peer to peer connection to G2 G1 and G2 are separately operated using their own speed controller They are switched on together They accelerate via the ramp function generator of G1 When required the speed at G2 can be influenced via Nnsupp at X177 25 26 4 4 3 Parameter settings The converters are commissioned corresponding to the associated operating instructions up to but not including the optimization runs rated data current limits etc The following additional parameters must then be set G1 G2 p50081 1 Field weakening possible p50081 1 Field weakening possible p50083 2 Operation with incremental encoder p50083 2 Operation with incremental encoder p50169 0 Torque control p50169 0 Torque control p50170 1 Torque control p50170 1 Torque control p50171 xx Adaptation of the torque setpoint for different motor unit assignments XX GERLA IMoTLA IcGeERLA unit current master drive ImotLa motor current master drive p50430 0 53010 0 Input of the torque setpoint from G1 0 with terminal 11 p50430 1 53010 01 Input of a fixed setpoint for n closed loop control p50431 0 52602 Torque setpoint from G1 p50431 1 52002 T
5. the tables Gi to G4 p50081 1 Field weakening possible p50083 2 Operation with incremental encoder p50169 0 Torque control p50170 1 Torque control p50500 52204 Torque setpoint p50644 52601 Input torque setpoint for the slave drive p50645 52015 Supplementary speed setpoint Only connect the supplementary setpoint for drives G2 to G4 p51655 52148 Torque setpoint from its own n controller p50687 53010 07 Switchover to slave drive p50716 53010 06 Enable supplementary setpoint p50790 5 Peer to peer p50791 1 Number of words transferred p50793 8 Baud rate p50794 0 52452 Torque setpoint to Slave p50795 1 Bus terminating resistor peer to peer ON Only set for the last drive p50797 2 s Telegram failure time p50816 53010 07 Enable receive P819 53010 00 Enable send p51652 xx Adaptation of the torque setpoint for different motor unit assignments XX loer Imor leer unit current Imot motor current Master slave switchover application 12 C98130 A7066 A503 01 7619 03 2011 5 4 Version 2 5 4 1 Description of functions Master and slaves are operated closed loop speed controlled However the speed controller of each slave is overcontrolled with a fixed value e g 5 and therefore tends towards the direction of the positive torque limit By additionally entering the torque setpoint of the master as torque limit for the slaves this limit can be shifted as required
6. 94 0 00898 Control word 1 p50794 1 52148 Torque setpoint p50794 2 52170 Speed actual value p50795 1 Bus terminating resistor peer to peer ON p50797 2 s Telegram failure time p50797 2 s Telegram failure time 4 3 4 Optimization runs With the coupling open the two drives can be optimized independently of one another according to the operating instructions Master slave switchover application C98130 A7066 A503 01 7619 03 2011 44 Version 2 NOTICE lt must be noted that due to the selected structure of the closed loop control operation in only one direction of rotation with a positive setpoint is possible If operation with two directions of rotation is required then Version 1 Page 7 must be selected 4 4 1 Operating mode of the master slave drive Coupling Ku1 is closed The speed setpoint Nnset is connected at G1 to terminal X177 25 26 and is transferred via the peer to peer connection to G2 G1 and G2 are operated closed loop speed controlled However the speed controller of G2 is overcontrolled with a fixed value e g 5 and therefore tends towards the direction of the positive torque limit By additionally entering the torque setpoint from G1 as torque limit for the slave drive this limit can be shifted as required between Mmax and Mmax therefore setting the torque the same as the torque from G1 If in this operating mode Ku1 is mistakenly open then the speed of G2 only increases by
7. A a Ad ae ood se eo 12 Parameter Settings iii o tos 12 Version Li A A A a 13 Description OF TUNCTIONS ci cia A A AA AA Ias E 13 Parameter Settings ici da oia oia 13 Current distribution using the droop function ooooccconnnnconoccccnonononanannnonnnonnnanncnnnnnnnnnrnnnnnnnnnnnnnnnn nan nnnnnnnrannnnnnnnncnnnns 14 Application o A SO iiO Rai anion 14 Recommended Ciria A isn eeh deena 14 DeSCIIPUON OFTUNCIONS E 15 ParameterassignmMent sn asdi n i A RA ee einstein eh tiie tie 15 Final settingiem a e ie A A ee 15 Siemens 2011 C98130 A7066 A503 01 7619 03 2011 1 Instructions Note This application document does not claim to contain all details and versions of units or to take into account all conceivable operational cases and applications The standard applications do not represent specific customer solutions but are only intended to provide support in the implementation of typical applications The operator is responsible for the correct operation of the products described Should you require further information or encounter specific problems which have not been handled in enough detail please contact your local Siemens office The contents of this application document are not part of an earlier or existing contract agreement or legal relationship nor do they change such contracts agreements or legal relationships The contract of sale in each case outlines all the obligations of the DT Drive Technologies Division of
8. SINAMICS DCM DC converters from 6 kW to 2500 kW for variable speed direct current drives Master slave switchover application Edition 01 03 2011 A SINAMICS drives SIEMENS SIEMENS SINAMICS DCM Master slave switchover application Compact User Manual Legal information Warning notice system This manual contains notices you have to observe in order to ensure your personal safety as well as to prevent damage to property The notices referring to your personal safety are highlighted in the manual by a safety alert symbol notices referring only to property damage have no safety alert symbol These notices shown below are graded according to the degree of danger indicates that death or severe personal injury will result if proper precautions are not taken A WARNING indicates that death or severe personal injury may result if proper precautions are not taken cauTION with a safety alert symbol indicates that minor personal injury can result if proper precautions are not taken CAUTION without a safety alert symbol indicates that property damage can result if proper precautions are not taken NOTICE indicates that an unintended result or situation can occur if the corresponding information is not taken into account If more than one degree of danger is present the warning notice representing the highest degree of danger will be used A notice warning of injury to
9. aster slave drives for rigidly coupled MOtOFS ooooooncccinnoncccconoccccnnncnccnnnnnccnnnnnncnnnrn nn nn arrancar 4 APP ION A oa 4 Recommended Cll iii A ee SS ee ee asta 4 Parameter Settings ii A ee a eee ea ae eens eee te 5 Optimization UNS imita a o aston pessna eed desea evenness eed 6 ESOS E CAE AA anneron Ea Esa NKUNA E onma Orda rt ANANDA NTa akaa SN ia PEEN KONR ERER aua katai 7 ADDIICATION aniren atea iet aa a a ds ea aa ro aAa aS 7 Recommended A a eee 7 O OS O T ea ateaeba sae cs spestpanegs 7 Operating mode of the master slave CriVE e ee eececeeeeeeceeeeeeeeeeeeneeeeeeeeeecaeeeeeeaeeeseeeaeeesaeeeeeaeeeseeeaeeeeeseneeeesenaeeseeaeess 7 Separate Operation tica id 7 Parameter Settings lt n sec Aen el eee i Aa ee ede phn ne ied ad os AD eae eee 8 Optimization TUNS miii toa dare cede 8 MOISION Zestoa Mt cles fold deere Gin Mie eet eed iM ies i eed tel oe etl 9 Operating mode of the master slave driVe ooonoconnnnccnniccnnnoccccnnnonnnnono cnn nn nn nr naar narrar rra rn 9 Separate OPSration cuicos bocata 9 Parameter Settings ii toa 9 OptimiZatlOn TUNS So 10 Master slave switchover for Several drives cccseceeceessneeeeseneeeeseneeeeseneesesaeesessneeseseaeesesaneesessessaeeaeeenesessneeeneas 10 Ap pli Cation sonnan steed ye E EN AN EA ceveeetn eee aged AAE TEE EAN EKE OAN AAEE OAA EATE EEA OA CEE SEEE PRETENEN 10 Recommended Circuit A E ATENT AANA TAAN AAN a 10 Version Mirar ta a aa a a 12 Description Of TUNCHONS
10. ave of G1 Slave of G1 send Mset Open Closed Closed Master Master Slave of G2 Slave of G2 send Mset Open Open Closed Master Master Master Slave of G3 send Mset Open Open Open Master Master Master Master Master slave switchover application C98130 A7066 A503 01 7619 03 2011 11 5 3 Version 1 5 3 1 Description of functions A master is always closed loop speed controlled A slave is always torque controlled and receives its torque setpoint from the immediately preceding master The external speed setpoint is connected to G1 to G4 at X177 25 26 whereby for each drive that is the master then its own ramp function generator is active If required the speed of drives G2 to G4 can be separately influenced using Nsuppiat X177 27 28 In order that each drive can be separately switched on this must be realized individually for each drive using an external control e g at terminals X177 12 13 see the operating instructions In this mode it must be guaranteed again that there really is a rigid mechanical connection to the master when slave is selected as otherwise the drive could uncontrollably accelerate 5 3 2 Parameter settings Commission the converter units according to the associated operating instructions also including the separate optimization runs with the couplings in the open state The parameterization is in principle the same for all drives the exceptions are explained separately in
11. ciple the same for all drives the exceptions are explained separately in the table Drives G1 to Gn p50081 1 Field weakening possible p50083 2 Operation with incremental encoder p50169 0 Torque control p50170 1 Torque control p50227 e g 5 p50634 0 52601 Droop Speed setpoint from G1 Set this parameter for all drives with the exception of the first drive G1 p50684 53010 00 Switch on the droop function p50790 5 Peer to peer p50791 1 Number of words transferred p50793 8 Baud rate p50794 0 52190 Speed setpoint after the ramp function generator Only set this parameter for drive G1 p50795 1 Bus terminating resistor peer to peer ON Only set for the last drive p50797 2 s Telegram failure time 6 5 Final setting e Activate droop for all drives e In operation and with a frictional connection to the continuous material web p50227 adjust until the load distribution between the units has reached the desired value e If the setting range of p50227 0 10 is not sufficient then adjust the speed using p2000 until p50227 intervenes Trademarks All names identified by are registered trademarks of the Siemens AG The remaining trademarks in this publication may be trademarks whose use by third parties for their own purposes could violate the rights of the owner Disclaimer of Liability We have reviewed the contents of this publication to ensure consiste
12. d weakening possible p50083 2 Operation with incremental encoder p50083 4 Freely wired actual value p50169 0 Torque control p50169 0 Torque control p50170 1 Torque control p50170 1 Torque control p50503 xx Adaptation of the torque setpoint for different motor unit assignments E Imorra lt leerta Pr IMoTLA X lserra Imorra motor current slave drive ImorLa motor current master drive IGERFA unit current slave drive leerLa unit current master drive p50500 52602 Torque setpoint from the Master p50609 52603 Speed actual value from the master p00840 52606 0 On Off1 via word 1 0 peer to peer p00852 52606 03 Enable operation using word 1 03 peer to peer p50687 1 Switchover to slave drive p50790 5 Peer to peer p50790 5 Peer to peer p50791 3 Number of words transferred p50791 3 Number of words transferred p50793 8 Baud rate p50793 8 Baud rate p50794 0 00898 Control word 1 p50794 1 52148 Torque setpoint p50794 2 52167 Speed actual value p50795 1 Bus terminating resistor peer to peer ON at the last slave p50797 2 s Telegram failure time p50797 2 s Telegram failure time Master slave switchover application C98130 A7066 A503 01 7619 03 2011 3 4 Optimization runs Individually perform the optimization runs lt 1 gt master drive e Open the coupling between the gear unit and load e Set p50171 p50172 current limits at the slave drive to zero This means that only the master drive is active e Perform the optimization run fo
13. end on the particular units and should be taken from the operating instructions __ Material web l a D X177 Nset 0_25 26 1c1 si 1D1 Droop ON 11 SINAMICS DCM 1D1 4 101 4 37 38 G1 3c 3D Nact lt IRE X177 1C1 as 1D1 Droop ON m SINAMICS DCM 1D 1C1 G2 3C gt 39 n 40 3D Nact ry To the next drive Master slave switchover application 14 C98130 A7066 A503 01 7619 03 2011 6 3 Description of functions For load distribution the speed controller output torque setpoint which can be adjusted using parameter p50227 is fed back to the input and used as auxiliary variable for the current distribution For some drives it can be beneficial if the droop function is only be activated if there is already a frictional connection to the material web The setting of 10 droop function ensures that for 100 controller output the actual speed deviates by 10 from the setpoint this function softens the control Switch on and enable operation of the units via terminals X177 12 13 optionally also parameterizable for G2 to Gn via peer to peer 6 4 Parameter assignment Commission the converters separately according to the associated operating instructions including the optimization runs but with the droop function not activated The parameterization is in prin
14. is transferred via the peer to peer connection to G2 When required the speed at G2 can be influenced via nsuppi at X177 25 26 Master slave switchover application C98130 A7066 A503 01 7619 03 2011 4 3 3 Parameter settings The converters are commissioned corresponding to the associated operating instructions up to but not including the optimization runs rated data current limits etc The following additional parameters must then be set G1 G2 p50081 1 Field weakening possible p50081 1 Field weakening possible p50083 2 Operation with incremental encoder p50083 2 Operation with incremental encoder p50169 0 Torque control p50169 0 Torque control p50170 1 Torque control p50170 1 Torque control p50503 xx Adaptation of the torque setpoint for different motor unit assignments eee IMotra X Icerta motua leersa Imorra motor current slave drive ImotLa motor current master drive leerra unit current slave drive IcERLA unit current master drive p50500 52602 Torque setpoint from G1 p50634 0 52603 Speed setpoint from G1 p50634 1 52011 Supplementary speed setpoint p00840 52606 0 On Off 1 from the master p00852 52606 03 Enable operation from the master p50687 53010 00 Switchover to slave drive terminal 11 p50790 5 Peer to peer p50790 5 Peer to peer p50791 3 Number of words transferred p50791 3 Number of words transferred p50793 8 Baud rate p50793 8 Baud rate p507
15. ncy with the hardware and software described Since variance cannot be precluded entirely we cannot guarantee full consistency However the information in this publication is reviewed regularly and any necessary corrections are included in subsequent editions Siemens AG Industry Sector Postfach 48 48 90026 N RNBERG Master slave switchover application C98130 A7066 A503 01 7619 03 2011 Siemens AG Subject to change Industry Sector C98130 A7066 A503 01 7619 P O Box 48 48 Siemens AG 2011 90026 NUREMBERG GERMANY www siemens com automation
16. orque enable for n closed loop control p50605 0 52204 Torque limit p50621 52015 Overcontrol speed controller Master slave switchover application C98130 A7066 A503 01 7619 03 2011 G1 G2 p50634 0 52603 Speed setpoint from G1 p50634 1 52011 Supplementary speed setpoint p00840 52606 0 On Off 1 from the master P00852 52606 03 Enable operation from the master p50706 53010 01 Enable supplementary speed setpoint p50712 5 p50716 53010 01 Overcontrol setpoint for n controller Input overcontrol setpoint p50790 5 Peer to peer p50790 5 Peer to peer p50791 3 Number of words transferred p50791 3 Number of words transferred p50793 8 Baud rate p50793 8 Baud rate p50794 0 01 Control word 1 00898 p50794 1 02 Torque setpoint 52148 p50794 2 52170 Speed actual value p50795 1 Bus terminating resistor peer to peer ON p50797 2 s Telegram failure time p50797 2 s Telegram failure time 4 44 Optimization runs With the coupling open the two drives can be optimized independently of one another according to the operating instructions 5 Master slave switchover for several drives 5 1 Application e For several motors connected to a shaft e Each drive can be the master drive for the following one 5 2 Recommended circuit In the following a constellation with four SINAMICS DCM drive units will be explained as an exam
17. ower supply protection fusing etc depend on the particular units and should be taken from the operating instructions X177 Nset 25 26 Se SINAMICS DCM 3D ME 4 37 1C1 38 G1 4D1 1D1 1C1 Nact 1C1 JIL ee a Kui X177 Nsuppl 25 26 101 S1 1D1 Master slave switchover 0 11 SINAMICS DCM 1D1 P o 101 Z G2 3C TL 39 40 3D Nact Ku1 mechanical coupling S1 contact closed if Ku1 closed Nset speed setpoint Nsuppi Supplementary speed setpoint 4 3 Version 1 4 3 1 Operating mode of the master slave drive Coupling Ku1 is closed G1 is the Master and is operated in the closed loop speed controlled mode The speed setpoint Nse is connected to G1 at terminal X177 25 26 G2 is the slave is operated in the closed loop current controlled mode and receives a current or torque setpoint from G1 In this operating mode it is absolutely essential to ensure that Ku1 is closed as otherwise drive G2 can accelerate uncontrollably as there is no closed loop speed control and the load torque lt motor torque 4 3 2 Separate operation Coupling Ku1 is open G1 and G2 are separately operated using their own speed controller They are switched on together They accelerate via the ramp function generator of G1 The speed setpoint nset is connected at G1 to terminal X177 25 26 and
18. persons with a safety alert symbol may also include a warning relating to property damage Qualified Personnel The product system described in this documentation may be operated only by personnel qualified for the specific task in accordance with the relevant documentation for the specific task in particular its warning notices and safety instructions Qualified personnel are those who based on their training and experience are capable of identifying risks and avoiding potential hazards when working with these products systems Proper use of Siemens products Note the following A WARNING Siemens products may only be used for the applications described in the catalog and in the relevant technical documentation If products and components from other manufacturers are used these must be recommended or approved by Siemens Proper transport storage installation assembly commissioning operation and maintenance are required to ensure that the products operate safely and without any problems The permissible ambient conditions must be adhered to The information in the relevant documentation must be observed Siemens 2011 C98130 A7066 A503 01 7619 03 2011 1 Table of contents 1 2 3 3 1 3 2 3 3 3 4 4 4 1 4 2 4 3 4 3 1 4 3 2 4 3 3 4 3 4 4 4 4 4 1 4 4 2 4 4 3 4 4 4 5 1 5 2 5 3 5 3 1 5 3 2 5 4 5 4 1 5 4 2 6 1 6 2 6 3 6 4 6 5 Instructions ii di Ue AA CA AAA A to ii 3 A A O e 3 M
19. ple The assignment of the connections not shown power supply protection fusing etc depend on the particular units and should be taken from the operating instructions 10 Master slave switchover application C98130 A7066 A503 01 7619 03 2011 Enable G1 send Enable G2 send G2 is master Enable G3 send G3 is master G4 is master Ku1 mechanical coupling 1 Ku2 mechanical coupling 2 Ku3 mechanical coupling 3 Contact designations X177 Nset 25 26 ae Ku1 27 28 La SINAMICSDCM 3064 37 101 a G1 1D1 40 1D1 Naat c1 Http X177 Nset 25 26 3C Kut l Ku1 Ku2 suppl 27 28 A SINAMICS DCM 3D Ku1 37 1C1 an G2 os 40 1D1 Nact p 1C1 Http X177 Nset 25 26 a kue j Ku2 Ku3 suppl 27 28 a SINAMICS DCM 3D Ku2 L 37 MY M 38 G3 ADA 0 39 Lo 40 1D1 arp 1C1 M TL At X177 Nset 25 26 36 Kus j Nsuppl 27 28 Ku3 4 P SINAMICS DCM 3D 37 101 A a G4 1D1 40 1D1 Nact 1C1 M TL e g Ku1 contact closes if coupling 1 closed Ku1 contact closes if coupling 1 open Due to the feedback signals of the coupling states in the drive units the correct marshaling is realized for the peer to peer connections The following table is intended to show this Kut Ku2 Ku3 G1 G2 G3 G4 Closed Closed Closed Master Slave of G1 Sl
20. r the precontrol and current controller at the master drive e Perform the optimization run for the speed controller without load at the master drive This is done to create stable speed relationships when plotting the field characteristic e Perform the optimization run for field weakening at the master drive e Set p50171 p50172 at the slave drive back to the original values lt 2 gt slave drive e Set p50171 p50172 current limits at the master drive to zero This means that only the slave drive is active e Perform the optimization run for the precontrol and current controller at the slave drive e Perform the optimization run for field weakening at the slave drive This is possible as the torque setpoint is received from the already optimized speed controller of the master drive e Set p50171 p50172 at the master drive back to the original values lt 3 gt master drive slave drive e Re couple the load e Perform the optimization run for the speed controller with a coupled load Master slave switchover application 6 C98130 A7066 A503 01 7619 03 2011 4 Master slave switchover 4 1 Application e For speed controlled master drive with slave drive which can be optionally operated as master drive e For example printing machines 4 2 Recommended circuit The hardware circuit is the same for both of the following versions the only difference is in the parameterization The assignment of the connections not shown p
21. setpoint from term 25 26 Set this parameter for all drives p50645 52015 Supplementary speed setpoint terminal 27 28 Set for G2 to G4 p51655 52148 Torque setpoint from its own n controller p50716 53010 06 Enable supplementary speed setpoint Only set the parameter for drives different than G1 otherwise keep the factory setting p50722 5 Overcontrol setpoint for n controller p50726 53010 07 Input overcontrol setpoint p50790 5 Peer to peer p50791 1 Number of words transferred p50793 8 Baud rate p50794 0 52452 Torque setpoint to Slave p50795 1 Bus terminating resistor peer to peer ON Only set for the first and last drive p50797 2 s Telegram failure time p50816 53010 07 Enable receive p50817 53010 00 Enable send p51652 xx Adaptation of the torque setpoint for different motor unit assignments xx SER Imor leer unit current Imot motor current Master slave switchover application C98130 A7066 A503 01 7619 03 2011 13 6 Current distribution using the droop function 6 1 Application e The droop function can be used to distribute the load between converter units for two or several drives without a rigid connection between them e For example guide rollers on a material web running with an impressed velocity 6 2 Recommended circuit The assignment of the connections not shown power supply protection fusing etc dep
22. tions not shown power supply protection fusing etc depend on the particular units and should be taken from the operating instructions The master is operated in the closed loop speed controlled mode and generates a torque setpoint which supplies its own current controller as well as that of the slaves The slaves are switched on via control word 1 of the master The speed actual value is routed via the peer to peer connection to all units in order to also allow a field characteristic to be plotted for the slaves Ramp function generator and speed controller of the slaves are not active When braking all of the drives are ramped down using the down ramp of the master as well as common shutdown at n lt nmin X177 Nset 00_25 26 30 l SINAMICS DCM 3D ME 37 38 Master N 1D1 c at aet Http X177 1C1 1D1 SINAMICS DCM 101 AM 1C1 Slave 3C 9 39 3 n 40 3D ti To the next slave drive Master slave switchover application 4 C98130 A7066 A503 01 7619 03 2011 3 3 Parameter settings The converters are commissioned corresponding to the associated operating instructions up to but not including the optimization runs rated data current limits etc The following additional parameters must then be set Master drive Slave drives 1 n p50081 1 Field weakening possible p50081 1 Fiel
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