SERVICE MANUAL FOR TRAVELING INVERTER
Contents
1. 2 OFF ccccceeeeeee eee ee eeccnee eee etree tee aaaee essere eteeaaaeeeeeeeeeegecaaaeeeeeeeeeeeeaaaes 7 2 2 EP2 control S6 1 ON amp S6 2 OFF ccceeceeeee eee eeecccee teeter ee eeeaaaee nese eeeteeaaaeeeeeeeeeeecaaaeeeeeeeeesesenaaeeeeees 7 2 3 EP3 control S6 1 OFF amp S6 2 ON ecceeeeeee cette eeccce teeter eet eeaaaee tees ee eteeaaaaeeeeeeeeeteccaaaeeeeeeeeeseeecaaeeeeees 8 2 4 MS4 control S6 1 ON amp S6 2 ON eee eect eee ee eee anette eee a eee e eee eaaaeee sees eeteeaaaaeeeeeeeeeeeeaaaes 8 3 FAULT CODES TROUBLESHOOTING sicciicticeccssadeeahasthecsdincidercansdceavansivervassedaviarndesdaabsckdinrnrdaninns 9 1 PROGRAMMING OF THE APPLICATION PARAMETERS cccccccccccccccceeeceeeeeeeeeeeeeeeeeeeeeeeeeess 10 3 1 Minimum speed maximum speed and ramp time cc cence eect teen e eee e eee eeeecaaeeeeee ee eteecaaaeeeeeeeeeteee 10 3 1 1 Example of parameter Settingan ee teen a aes teen nett E A a E 10 3 1 2 Acceleration and deceleration ramMp cccccccceeeceeeecceeee eee eee eeeecaaeeeeeeeeeeeecaaeeeeeeeeeteecdaaeeeeeeeeeneeaaaes 11 3 1 3 Example of parameter Setting 0 0 cccceccceceee cece eeeeecaaeeeeeeeeeeeeaaaaeeeeeeeeegaaaaaeeeeeeeeeeecaaaaeeeeeeeeeeenaaaes 11 3 2 StOPpPiNg Meth e cece e ee eee eee eee eee eee EA eee eee eee eee 11 3 3 GOMUON MONG xiao sees a eee eerste ee ee eee ee ee oe ea eee eae 11 3 4 IOWOOWI SD CCC Ses anenee a a E E 12 3 5 Speed2 and SPCCUS anuna r2. 7 4 MFO6MA200 400V 100Hz 460V 120Hz 0 00xx 10xx 11xx MFO6MA100 400V 80Hz 1010 10xx 11xx MFO6LA200 400V 100Hz 460V 120Hz 10 10xx 11xx MFO6LA100 400V 80Hz 1001 10xx 11xx MFO6LB200 400V 100Hz 460V 120Hz 10 01xx s MFO6LB100 400V 80Hz 1011 01xx MF07LA200 380 415V 50Hz 460 480V 60Hz 100 00xx 10xx 11xx MF07LA100 380 415V 50Hz 460 480V 60Hz 101 00xx 10xx 11xx MF07LB200 380 415V 50Hz 460 480V 60Hz 100 00xx 01xx 3 MF07LB100 380 415V 50Hz 460 480V 60Hz 101 00xx 10xx 11xx MF07ZC200 380 415V 50Hz 460 480V 60Hz 110 10xx 11xx MF07ZC100 380 415V 50Hz 460 480V 60Hz 111 10xx 11xx MFO9LA200 380 415V 50Hz 460 480V 60Hz 110 11xx MFO9LA100 380 415V 50Hz 460 480V 60Hz 111 01xx 11xx z MFO9LB200 380 415V 50Hz 460 480V 60Hz 101 11xx MFO9LB100 380 415V 50Hz 460 480V 60Hz 111 11xx 3 6 Defining the motor parameters 3 6 1 Motor nominal voltage and frequency Motor nominal voltage and frequency are selected by switches S4 1 and S4 2 according to the following table Motor nominal S4 1 4 2 Speedtable Voltage Frequency 400V 100Hz 0 0 A 460V 120Hz 400V 80Hz 1 0 B 380 415V 50Hz 0 1 C 440 480V 60Hz 3 6 2 IR compensation By the IR compensation the effect of the stator resistance at low frequencies is compensated by increasing the U f ratio Typically the necessary amount of compensation added voltage is higher for small motors The IR compensation is set by switches S4 3 and S4 4 Estimation of
3. frequency by the four switches of the switch package S2 Switch Table A Table B Table C S1 S2 100 120Hz motors 80Hz motors 50 60Hz motors 1 2 3 4 Max speed Min speed Max speed Min speed Max speed Min speed Hz Hz Hz Hz Hz Hz 0 0 0 1 50 14 42 14 25 7 0 0 1 1 54 10 40 10 27 5 0 1 0 1 58 12 44 12 29 6 0 0 1 0 62 23 50 18 31 12 0 1 1 0 66 16 46 16 33 8 0 1 1 1 70 18 48 20 35 9 1 0 0 1 75 20 53 24 38 10 0 1 0 0 80 32 62 30 40 16 1 0 1 0 85 26 56 26 43 13 1 0 1 1 90 35 59 28 45 18 1 1 0 0 95 38 65 32 48 19 0 0 0 0 100 29 77 22 50 15 1 1 0 1 105 41 68 34 53 21 1 1l1lo 110 44 71 36 55 22 1 o0 o0 0 115 50 80 40 58 25 1 4 444 120 47 74 38 607 24 1 100Hz may be exceeded only if line voltage is 440 480V mains 2 50Hz may be exceeded only if line voltage is 440 480V mains 3 1 1 Example of parameter setting 80Hz motor is connected to the inverter and 62Hz maximum speed is desired That speed is located on the 5 row in the speed table B The corresponding setting for S1 swithces is in the same row in the leftmost columns of the table 0 1 0 0 off on off off S1 did NO FEEL 10 14 R amp M Materials Handling Inc reserves the right to alter or amend the above information without notice R amp M Materials Handling Inc R amp M 4501 Gateway Boule
4. this occurs if any of line to line voltages exceeds 480V 10 528V If line voltage cannot be reduced install drop down transformer Check the supply voltage phases at terminal X2 Check the drive command signal at terminal X1 Check the limit switch signals at terminal X1 Check that the control voltage level is correct Rating plate is located on the left side of the inverter Check all parameters especially the motor dependent parameters Check that the motor s corresponds the selected motor parameters Check that the brake opens and closes properly Check the brake airgap if necessary Inverter starts and opens the brake but motor does not rotate Check motor current parameter 9 14 R amp M Materials Handling Inc reserves the right to alter or amend the above information without notice R amp M Materials Handling Inc R amp M 4501 Gateway Boulevard MATERIALS Springfield Ohio 45502 DLING RANDELIN P 937 328 5100 INC FAX 937 325 5319 1 PROGRAMMING OF THE APPLICATION PARAMETERS A Check that he wiring and the mechanical performance of the machinery is suitable for the selected application parameters 3 1 Minimum speed maximum speed and ramp time The adjustment ranges of maximum and minimum speed depend on the selected motor nominal frequency Table A is for 100 and 120Hz motors Table B for 80Hz motors and Table C for 50 and 60Hz motors Maximum speed is set by the four switches of the switch package 1 and minimum
5. 3 DI3 Digital input 48 or 115V 50 60Hz 4 DI4 Digital input 48 or 115V 50 60Hz 5 DI5 Digital input 48 or 115V 50 60Hz 6 ONE Control voltage neutral 7 R01 Relay output 8 R02 Relay output 9 Empty 10 T1 Motor thermistor 11 T2 Motor thermistor Power cabling is connected to terminal block X2 as follows w Crane power supply conductor rail must have double collectors Nbr Name Description 1 L1 Mains phase 1 380 480V 50 60Hz 2 L2 Mains phase 2 380 480V 50 60Hz 3 L3 Mains phase 3 380 480V 50 60Hz 4 U Motor phase 1 5 V Motor phase 2 6 Ww Motor phase 3 7 R Braking resistor positive see note 8 R Braking resistor negative see note 9 PE Protective earth 3 14 R amp M Materials Handling Inc reserves the right to alter or amend the above information without notice R amp M Materials Handling Inc R amp M 4501 Gateway Boulevard MATERTALS Springfield Ohio 45502 TANDING P 937 328 5100 FAX 937 325 5319 INC w Standard duty resistor must be disconnected when heavy duty resistor DMHR01F90 is connected to terminals R and R 1 2 Technical characteristics Technical data Power range 2 2 kW Supply voltage 380 480 VAC 10 Nominal supply frequency 48 62 Hz Nominal current 5 1A Digital control S1 S2 DI3 D14 DI5 Max output voltage Equal to supply voltage Contro
6. English Original instructions SERVICE MANUAL FOR TRAVELING INVERTER Service Manual for DMCS 022F SUPDOC_SM_DMCS055 0 ORD 25 3 2010 Sal MATERIALS HANDLING INC SUPDOC_SM_DMCS0550100 0 PS02379 25 3 2010 R amp M Materials Handling Inc R amp M 4501 Gateway Boulevard Hil ES Springfield Ohio 45502 HANDLING INC P 937 328 5100 FAX 937 325 5319 Table of content 1 DESCRIPTION OF THE INVERTER siccsiccscsmnicrsenctiactcareidxdeecesaxtemewiardinnstebiaewinrdeecsierseaeldadeeiateeaewiets 3 1 1 CONNECCION S iienaa n E ee eet ed ein nd ee a a S 3 1 2 Technical Characteristics seniorii rir EA EREE ERA EE ENAA E AAA eee 4 1 3 Normal OP Sr AUO I xcessses seco et eee eae soe eae nue 4 1 4 Status indication leds green and red 2 0 0 2 cece eee eeeeee eee eect cece e ee eee eee ttnn teeter aaee sees ee enneeaaaeeeeeeeeeneee 4 1 5 Programming SWICNES an ra eee ALARA AA T ETAT eo a 4 1 6 The EMC requirements Not in use for deliveries in USA Canada ccccssssseeeeeeseeeeseesessssesssseeeaeaaes 5 1 6 1 EMC filter connection to inverter for trolley travelling ccccececieeccceeeeee eee eeeeccaeeeeeeeeeeteedaaeeeeeeeeenee 5 1 6 2 EMC filter connection to inverter for bridge travelling ccccceceeceeeeeeeeeeeeteeccaeeeeeeeeeteeecaeeeeeeeeetteee 5 2 DESCRIPTION OF CONTROL MODES i ivitccateataianietcstiicreranteivipastesneriniaisibiclasnapisedaaeees ie 7 2 1 MS2 control S6 1 OFF amp S6
7. a ees ee eee a eae 12 2 PROGRAMMING OF THE MOTOR PARAMETERS wiisaidiianninanidinni nn ena 13 3 6 Defining the Motor parameters cece eee eter eee e ee eee eter eee e tec a dee e eee e reed aaaeeeeeeeeetecaaaeeeeeeeeeteeeaaaes 13 3 6 1 Motor nominal voltage and frequency ccccccceeeeeeeceee eee eeeeeeeccaeeeeeeeeeeeecaaaeeeeeeeeeteecdaaeeeeeeeeeeeenaaaes 13 3 6 2 IR COMPENSALION cece eect ctte eee ee ee eee e reer etna a eee ee eee aaee nese sent aaaaeeeeeeeeeeeeaaaes 13 3 6 3 Motor nominal current 00 2 cece cee eee teeter ee eee eee eee eee a eee eee aaee eee e eee tneaaaaeeeeeeeeeneeaaaes 14 2 14 R amp M Materials Handling Inc reserves the right to alter or amend the above information without notice R amp M Materials Handling Inc R amp M 4501 Gateway Boulevard MATERIALS Springfield Ohio 45502 G Ssiamactentt P 937 328 5100 INC FAX 937 325 5319 1 DESCRIPTION OF THE INVERTER w There are high voltages inside the inverter including the programming switches Wait for at least three minutes after the supply voltage has been switched off before any service actions 1 Control terminal X1 2 Power terminal X2 3 Programming switches 4 Leds 1 1 Connections Control signals are connected to terminal block X1 as follows Nbr Name Description 1 S1 Drive command Direction 1 48 or 115V 50 60Hz 2 S2 Drive command Direction 2 48 or 115V 50 60Hz
8. amp time is too short Check Green the voltage of all supply phases at the terminal X2 If they are ok set a longer ramp by UUUUUUUUUUUUUUUUUL teh 3 and 5 3 p T Stall supervision overcurrent Brake does not open properly or there is an obstackle green UI iu UT ul ul il on the track Check also the motor dependent parameters 7 7 Deceleration ramp supervision Deceleration ramp has not been followed If the fault Green U UUU UUU UUl occurs again set longer ramp time by switch S3 Check also the setting of the motor nominal current switch S5 Motor overtemperature Check the type and the loading of the motor If there is no Green An L sensor in the motor the inverter terminals X1 10 11 must be short circuited Inverter overtemperature Motor current is too high bearing problem obstacle on the Green UU iji iji UU UU UL track brake does not open properly or the ambient temperature is too high Green Hl j ii j iii j nf Undervoltage Check the voltage of all supply phases at the terminal X2 m T Short circuit Switch the power off Check the insulation of the motor cables and the Red IL LI ji Ul jij ul motor windings Microprosessor fault Switch the power off for 10 seconds Then power up the Red LILLIA Mieropr eee The latest active fault is removed from the memory always when power is switched off w If inverter is not in a fault state but driving is not possible e Motor will not start if dc bus voltage too high above 745V
9. ccording to the table below INoM TOTAL S5 1 5 2 0 1 8A 0 0 1 9A 2 7A 1 0 2 8A 3 5A 0 1 gt 3 5A 1 1 For example there are two 1 5A motors gt Setting is S5 1 0 and S5 2 1 14 14 R amp M Materials Handling Inc reserves the right to alter or amend the above information without notice
10. coms4a eee A Pushbutton position B Speed S1 means drive minimum speed forward S2 means drive minimum speed reverse SP2 means drive speed2 SP3 means drive speed3 HSP means drive maximum speed When S1 and S2 are not active the inverter decelerates to zero The highest active input sets the speed reference i e if HSP is active SP2 and SP3 are ignored If SP3 is active SP2 is ignored 8 14 R amp M Materials Handling Inc reserves the right to alter or amend the above information without notice R amp M Materials Handling Inc R amp M 4501 Gateway Boulevard MATRAS Springfield Ohio 45502 ANDLING eee P 937 328 5100 INC FAX 937 325 5319 3 FAULT CODES TROUBLESHOOTING w There are high voltages inside the inverter including the programming switches Wait for at least three minutes after the supply voltage has been switched off before any service actions When the inverter detects a fault situation it stops running and starts signalling the fault code by blinking the indication leds green and red The blinking of the code is carried on until a new fault occurs or until power is switched off The fault codes are explained in the table below Fault code color Fault Possible cause Checkings j NNN Overvoltage Mains voltage is too high or deceleration r
11. l voltage range 48 VAC 115 10 If control voltage is 230VAC front resistors 15k 2W have to be connected to digital inputs Output Relay output for brake contactor Ambient temperature 10 C to 50 C Humidity 95 N C without dripping Degree of protection Frequency converter cover IP20 Dimensions WxHxD 134x195x123mm Altitude Output current must be reduced 1 for every 100 m over 1000 m For altitudes over 3000 m manufacturer must be consulted Pollution degree Pollution degree 2 according to NEMA ICS 1 IEC664 and UL840 Vibration IEC68 2 6 Shock IEC68 2 27 1 3 Normal operation The inverter goes into the ready to run state within one second after the power supply is connected During running the inverter follows the operator s speed reference according to the set acceleration deceleration ramp During direction change the brake is kept open all the time When drive command is switched off the inverter decelerates to zero according to the set ramp and closes the mechanical brake 1 4 Status indication leds green and red The inverter indicates its operating state by two leds Red led indicates fault state driving is inhibited Green led indicates ok state Blinking of green led indicates that fault state has been active but it has been recovered Normal driving is however possible also when green led is blinking in other words blinking of green led does not indicate warning state 1 5 Prog
12. nimum speed reverse HSP means maximum speed When S1 and S2 or are not active the inverter decelerates to zero 2 2 EP2 control S6 1 ON amp S6 2 OFF gt gt M cS DOS 0 Decelerate 1 Maintain speed 2 Accelerate A Pushbutton position B Speed S1 means drive forward S2 means drive reverse AP means accelerate When starting S1 and S2 mean accelerate to minimum speed When S1 and S2 are not active the inverter decelerates to zero During running S1 and S2 mean hold speed At maximum speed AP means hold speed 7 14 R amp M Materials Handling Inc reserves the right to alter or amend the above information without notice R amp M Materials Handling Inc R amp M 4501 Gateway Boulevard MATERIALS Springfield Ohio 45502 G ANDIE P 937 328 5100 INC FAX 937 325 5319 2 3 EP3 control S6 1 OFF amp S6 2 ON c_coep3a eee 0 Decelerate 1 Minimum speed 2 Maintain speed 3 Accelerate A Pushbutton position B Speed S1 means drive minimum speed forward S2 means drive minimum speed reverse AP means accelerate HOLD means hold speed When S1 and S2 are not active the inverter decelerates to zero At maximum speed AP means hold speed 2 4 MS4 control S6 1 ON amp S6 2 ON ob m c_
13. o times through input ferrite rings KC 330 00 includes capacitors 4 1uF and input ferrite rings 3 x EF 32008 Ferrite rings and capacitors must be placed as near the inverter as possible 1 6 2 EMC filter connection to inverter for bridge travelling c_kc330ca 1 Supply 2 EMC filter KC 330 00 3 Inverter 4 Motor cable length max 1 m 25 m 5 4x 1 uF 6 Input wires two times through input ferrite rings 7 Output ferrite ring RH175285107 5 14 R amp M Materials Handling Inc reserves the right to alter or amend the above information without notice R amp M Materials Handling Inc R amp M 4501 Gateway Boulevard NUMTESIUES Springfield Ohio 45502 P 937 328 5100 FAX 937 325 5319 KC 330 00 includes capacitors 4 1uF and input ferrite rings 3 x EF 32008 er HANDLING INC Ferrite rings and capacitors must be placed as near the inverter as possible 6 14 R amp M Materials Handling Inc reserves the right to alter or amend the above information without notice R amp M Materials Handling Inc R amp M 4501 Gateway Boulevard MATERIALS Springfield Ohio 45502 G Siiaiactentt P 937 328 5100 INC FAX 937 325 5319 2 DESCRIPTION OF CONTROL MODES 2 1 MS2 control S6 1 OFF amp S6 2 OFF gt gt s c_coms2a DOB A Pushbutton position B Speed S1 means drive minimum speed forward S2 means drive mi
14. only one input and therefore the speed is limited in both directions in the slowdown area There are two alternatives for the level of slowdown speed which are selected by switch S6 3 as follows S6 3 0 Slowdown speed is 20 of the maximum speed set by switch S1 S6 3 1 Slowdown speed is 35 of the maximum speed set by switch S1 3 5 Speed2 and Speed3 In MS4 control mode the lowest speed level is set by switch S2 and the highest level by switch S1 There are two alternative settings for the speed2 and speed3 which are set as a percentage of the maximum speed by switch S6 3 as follows S6 3 0 Speed2 is 20 of maximum speed and speed3 is 40 of maximum S6 3 1 Speed2 is 30 of maximum speed and speed3 is 50 of maximum 12 14 R amp M Materials Handling Inc reserves the right to alter or amend the above information without notice R amp M Materials Handling Inc R amp M 4501 Gateway Boulevard MATRAS Springfield Ohio 45502 HANDLING EAR P 937 328 5100 INC FAX 937 325 5319 2 PROGRAMMING OF THE MOTOR PARAMETERS The motor parameters are set by switches S4 and S5 according to the following table Only the most common motor types are shown in the table Settings for other motors can be defined when motor nominal frequency voltage current and the IR rate are known S5 settings S4 Number of motors Motor type Nominal voltage and frequency settings 1
15. ramming switches S1 S2 S3 ON DIP ON DIP ON DIP 1234 1234 1234 ON DIP ON DIP ON DIP 1234 1234 1234 S4 S5 S6 The programming of the inverter is performed by dip switches The state of each switch is either OFF 0 or ON 1 It is possible to set he following parameters by the switches S1 S6 e 1 Maximum speed e S2 Minimimum speed e 3 Acceleration deceleration time c_s022a 4 14 R amp M Materials Handling Inc reserves the right to alter or amend the above information without notice R amp M Materials Handling Inc R amp M 4501 Gateway Boulevard MATRAS Springfield Ohio 45502 HANDLING aaaea P 937 328 5100 INC FAX 937 325 5319 e S4 Motor frequency and IR compensation e S5 Motor current fast deceleration stopping method e S6 Control mode slowdown speed speed2 speed3 1 6 The EMC requirements Not in use for deliveries in USA Canada The device complies with the requirements of EN61800 3 2004 IEC61800 3 for second environment category C3 when a dedicated external EMC filter is applied 1 6 1 EMC filter connection to inverter for trolley travelling c_kc330ba 1 Supply 2 EMC filter KC 330 00 3 Inverter 4 Motor cable length max 3 m 5 4x 1 WF 6 Input wires tw
16. the correct setting of IR compensation is made by calculating the IR rate of the motor S4 setting U V ON DIP oM 2 N 4 N al 19 1 5 oCo 2 19 Z oo JO I Z oCo l h middle Calculation of the IR rate 13 14 R amp M Materials Handling Inc reserves the right to alter or amend the above information without notice R amp M Materials Handling Inc R amp M 4501 Gateway Boulevard MATERIALS Springfield Ohio 45502 G EASD P 937 328 5100 INC FAX 937 325 5319 IR rate Iyoy Ry p n Inom Nominal current of the motor one motor Rs Stator resistance measured between inverter terminals X2 4 5 P Number of polepairs N Number of motors connected to inverter Settings IR rate Setting of S4 90 84 3 0 S4 4 0 60 89 84 3 1 S4 4 0 40 59 S4 3 0 S4 4 1 37 S4 3 1 S4 4 1 A For conical brake motors it is recommended to set the IR compensation one step higher than the IR rate indicates The reliable operation of the brake must be verified during start up 3 6 3 Motor nominal current Motor nominal current is set by switches S5 1 and S5 2 as follows Check the nominal current of the motor from the rating plate a Calculate the total current by multiplying the current by the number of the motors Select the settings a
17. vard MATRAS Springfield Ohio 45502 ANDLING ee P 937 328 5100 INC FAX 937 325 5319 3 1 2 Acceleration and deceleration ramp Acceleration and deceleration ramps are set by switch S3 as follows Switch S3 Ramp time sec 1 2 3 4 1 0 0 0 1 5 0 1 0 0 2 0 0 0 0 0 2 5 0 0 1 0 3 0 0 0 0 1 3 5 1 0 0 1 4 0 1 1 0 0 4 5 0 0 1 1 5 0 1 1 1 0 5 5 1 1 0 1 6 0 1 0 1 1 6 5 1 0 1 0 7 0 0 1 1 1 7 5 0 1 0 1 8 0 It is possible to reduce the deceleration ramp time by 30 if necessary The fast deceleration ramp is activated by switching S5 3 ON 1 3 1 3 Example of parameter setting Acceleration deceleration time of 3 seconds is selected by setting switch S3 0 0 1 0 Fast deceleration 3sec is reduced to 2 1sec is activated by switch S5 3 1 ON_ DIP 3 S5 3 2 Stopping method The motor can be stopped either by dynamic braking by a ramp or by mechanical brake When stopping by mechanical brake is selected and drive command is switched off the inverter immediately cuts off the motor current and opens the relay contact The stopping method is selected by switch S5 4 as follows 5 4 0 Stopping by a ramp 5 4 1 Immediate stopping by mechanical brake 3 3 Control mode There are four different control modes available The inverter operation in different control modes is e
18. xplained in section 4 The control mode is selected by switches S6 1 and S6 2 according to the table below Control mode S6 1 S6 2 MS2 0 0 EP2 1 0 EP3 0 1 MS4 1 1 The functions of all five digital inputs is assigned automatically according to the selected control mode MS2 EP2 EP3 MS4 DI1 S1 S1 S1 S1 11 14 R amp M Materials Handling Inc reserves the right to alter or amend the above information without notice R amp M Materials Handling Inc R amp M 4501 Gateway Boulevard Hil ES Springfield Ohio 45502 TANDING P 937 328 5100 INC FAX 937 325 5319 MS2 EP2 EP3 MS4 DI2 S2 S2 2 2 DI3 HSP AP HOLD SP2 DI4 12 S11 AP SP3 DI5 S22 S21 11 S21 HSP Description of the control signals S1 Drive command forward AP Acceleration command 11 Slowdown limit forward 12 Stop limit forward SP2 Speed2 HSP High speed S2 Drive command reverse HOLD Hold speed command 21 Slowdown limit reverse 22 Stop limit reverse SP3 Speed3 3 4 Slowdown speed EP2 EP3 VA wooo S24 gt 81 Ly Bf S21 T S11 Slowdown frequency is activated in EP2 and EP3 control modes when the slowdown limit circuit is opened In EP2 there are separate inputs for both limit switch therefore it is possible to drive high speed in the slowdown area in the safe direction In EP3 there is
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