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Appendix B Accessories



VFD-EL-W

B-8

B.3.2 VFD-PU08 and VFD-PU08V

VFD-
PU08

Item

Specification

Compatible Drive

VFD-EL-W, ME300

Communication
Protocol

RS485

Size (mm)

PU08: W: 68.0, D: 35.6, H: 46.8.

PU08V: W: 36.5, D: 31.0, H:
70.0.

Installation method

PU08: By snap-fit or by fastening
screws.

PU08V: By fastening screws.

Protection Marking

Front panel: IP20;

Rear Panel: IP00

Network Interface

RJ45

(RJ: Registered Jack)

Maximum cable
length

5 meters

Main Function

-RS-485 communication

-Read/Write parameters,

-Display status,

-Send commands.

-Display startup meu

VFD-
PU08V

NOTE

The VFD-PU08 and VFD-PU08V don’t not include the extension cord. Please choose the suitable

extension cords as needed. (Refer to the table below)

Содержание VFD-EL-W Series

Страница 1: ... right to change the information in this catalogue without prior notice EMEA Headquarters Delta Electronics Netherlands B V Sales Sales IA EMEA deltaww com Marketing Marketing IA EMEA deltaww com Technical Support iatechnicalsupport deltaww com Customer Support Customer Support deltaww com Service Service IA emea deltaww com TEL 31 0 40 800 3900 BENELUX Delta Electronics Netherlands B V De Witbogt...

Страница 2: ...is and does not offer any kind of warranty through this user manual for using the product either express or implied including but not limited to the following i this product will meet your needs or expectations ii the information contained in the product is current and correct iii the product does not infringe any rights of any other person You shall bear your own risk to use this product In no ev...

Страница 3: ...omponents There are highly sensitive CMOS IC components on the motor drive s printed circuit boards These components are especially sensitive to static electricity Take anti static measure before touching these components or the circuit boards Never modify the internal components or wiring Ground the AC motor drive by using the ground terminal The grounding method must comply with the laws of the ...

Страница 4: ... starting to run the motor drive Do NOT run the motor drive at 100 rated voltage right away Pay attention to the following precautions when transporting and installing this package including wooden crate and wood stave 1 If you need to deworm the wooden crate do NOT use fumigation or you will damage the drive Any damage to the drive caused by using fumigation voids the warranty 2 Use other methods...

Страница 5: ...Circuit Connection 2 7 2 3 2 Main Circuit Terminals 2 8 2 4 Control Terminals 2 9 2 5 NPN PNP Mode 2 12 Chapter 3 Keypad and Start Up 3 1 3 1 Description of the Digital Keypad 3 2 3 2 Operation Method 3 5 3 3 Trial Run 3 7 Chapter 4 Parameters 4 1 4 1 Summary of Parameter Settings 4 2 4 2 Parameter Settings for Applications 4 23 4 3 Description of Parameter Settings 4 27 Chapter 5 Troubleshooting ...

Страница 6: ... 2 6 2 Maintenance and Inspections 6 6 Appendix A Specifications A 1 Appendix B Accessories B 1 B 1 Non fuse Circuit Breaker Chart B 1 B 2 Reactor B 2 B 2 1 AC Reactor B 2 B 2 2 Zero Phase Reactor B 4 B 3 Digital Keypad B 5 B 3 1 VFD PU06 B 5 B 3 2 VFD PU08 and VFD PU08V B 8 B 4 Optional Fan Kit B 10 Appendix C How to Select the Right AC Motor Drive C 1 C 1 Capacity Formulas C 2 C 2 General Precau...

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Страница 8: ...in an area with rapid changes in temperature that may cause condensation or frost to form 6 If the AC motor drive is stored for more than three months the temperature should not be higher than 30 C Storage for longer than one year is not recommended it could result in the degradation of the electrolytic capacitors 7 When the AC motor drive is not used for long time after installation in an environ...

Страница 9: ... N A 12pcs carton W Minimal and Economic Input voltage 21 230V 1 phase 43 460V 3 phase EL series Applicable motor capacity 002 0 25HP 0 2kW 004 0 5HP 0 4kW 007 1HP 0 75kW 015 2HP 1 5kW 022 3HP 2 2kW 040 5 5HP 4 0kW Product name Variable Frequency Drive 007EL21W1 H 20 11 0001 Production number Production week Production year 20 year 2020 H Hosur W Wujiang Production factory 230V 1 phase 1HP 0 75kW ...

Страница 10: ...board cover grounding terminal output terminals U T1 V T2 W T3 digital keypad choose NPN PNP choose ACI AVI control terminals RS485 terminal RJ45 input terminals R L1 S L2 T L3 frequency control knob digital keypad control board cover output terminals U T1 V T2 W T3 grounding terminal digital keypad choose NPN PNP choose ACI AVI control terminals RS485 terminal RJ45 ...

Страница 11: ... Frame B input terminals R L1 S L2 T L3 frequency control knob digital keypad case control board cover output terminals U T1 V T2 W T3 grounding terminal digital keypad choose NPN PNP choose AVI ACI control terminals RS485 terminal RJ45 ...

Страница 12: ...or the motor drive is a floating ground system IT or an asymmetric ground system TN you must remove the RFI jumper Removing the RFI jumper disconnects the internal capacitors from ground to avoid damaging the internal circuits and to reduce the ground leakage current Important points regarding ground connection Do not remove RFI jumper while the power is ON Make sure that main power is OFF before ...

Страница 13: ...board cover As shown in Step 1 below gently press the control board cover Then as shown in Step 2 pull it down slowly to remove it Step 1 Step2 Remove cooling fan To remove the cooling fan of Frame B gently release the clips on both sides of the cooling fan ...

Страница 14: ...out derating Relative Humidity 90 non condensing Atmospheric pressure 86 106 kPa Installation Site Altitude 1000 m Vibration 1 0 mm peak to peak value from 2 13 2 Hz 0 7 1 0 G from 13 2 55 Hz 1 0 G from 55 512 Hz compliance with IEC 60068 2 6 standard Storage and Transportation Temperature 20 C to 60 C 4 F to 140 F Relative Humidity 90 non condensing Atmospheric pressure 86 106 kPa Vibration 1 0 m...

Страница 15: ... Max Derating is required VFD002EL21W 1 Single Drive 120 50 50 60 VFD004EL21W 1 Side by Side Horizontal 120 50 30 50 60 VFD004EL43W 1 Zero stack Note 2 VFD007EL21W 1 Single Drive 120 50 50 Note 4 60 Side by Side Horizontal 120 50 30 50 Note 4 60 Zero stack Note 2 VFD007EL43W 1 VFD015EL43W 1 Single Drive 120 50 50 60 Side by Side Horizontal 120 50 30 50 60 Zero stack VFD015EL21W 1 VFD022EL21W 1 VFD...

Страница 16: ...lation whereas Frame B supports zero stack installation 3 Running the drive continuously with full load by the ambient temperature listed in the Max Derating is not requiered column reduces the drive s life span 4 After installing a cooling fan to VFD007EL21W 1 the operating temperature of this model is as shown in the table above When VFD007EL21W 1 doesn t have cooling fan its operating temperatu...

Страница 17: ...unning The metallic material on which the AC motor drive is mounted must be noncombustible be excellent at thermal dissipation and be able to withstand this high temperature 4 When installing multiple AC motor drives in the same cabinet mount them in a row with enough space between for ventilation When installing one AC motor drive below another one use a metal separator between the AC motor drive...

Страница 18: ... W 1 11 1 3 Dimensions Frame A1 VFD002EL21W 1 VFD004EL21W 1 VFD004EL43W 1 VFD007EL21W 1 VFD007EL43W 1 See A mounting hole Unit mm inch Frame W W1 H H1 D D1 S1 A1 92 0 3 62 82 0 3 23 162 0 6 38 152 5 98 128 7 5 07 5 4 0 21 5 4 0 21 ...

Страница 19: ...Chapter 1 Introduction VFD EL W 1 12 Frame A2 VFD015EL43W 1 See A mounting hole Unit mm inch Frame W W1 H H1 H2 D D1 S1 A2 92 0 3 62 82 0 3 23 180 5 7 11 162 0 6 38 152 5 98 128 7 5 07 2 0 0 08 5 4 0 21 ...

Страница 20: ...L W 1 13 Frame B VFD015EL21W 1 VFD022EL21W 1 VFD022EL43W 1 VFD040EL43W 1 See B mounting hole mounting hole Unit mm inch Frame W W1 H H1 D D1 S1 S2 B 100 0 3 94 89 0 3 50 174 0 6 86 162 9 6 42 136 0 5 36 4 0 0 16 5 9 0 23 5 4 0 21 ...

Страница 21: ...Chapter 1 Introduction VFD EL W 1 14 This page intentionally left blank ...

Страница 22: ... and short circuits Only qualified personnel familiar with AC motor drives are allowed to do the wiring Make sure the power is turned off before wiring to prevent electric shock Make sure that power is only applied to the R L1 S L2 and T L3 terminals Failure to comply may result in damage to the equipment The voltage and current should be in the range on the AC motor drive nameplate refer to Secti...

Страница 23: ...Wiring VFD EL W 2 2 2 1 Wiring There are wirings for main circuits and control circuits You must wire according to the following wiring diagrams 230V One phase VFD002EL21W 1 VFD004EL21W 1 VFD007EL21W 1 VFD015EL21W 1 VFD022EL21W 1 ...

Страница 24: ...Chapter 2 Installation and Wiring VFD EL W 2 3 460V Three phase VFD004EL43W 1 VFD007EL43W 1 VFD015EL43W 1 VFD022EL43W 1 VFD040EL43W 1 ...

Страница 25: ...s 7 With long motor cables high capacitive switching current peaks can cause over current high leakage current or lower current readout accuracy To prevent this the motor cable should be less than 20 m for 4 0 kW models and below The cable should be less than 50 m for 5 5 kW models and above For longer motor cables use an AC output reactor 8 The AC motor drives electric welding machines and the la...

Страница 26: ...Chapter 2 Installation and Wiring VFD EL W 2 5 Excellent grounding method Acceptable grounding method Grounding method not allowed Not allowed ...

Страница 27: ... as surges switching spikes short interruptions Install an AC line reactor when the power supply capacity is 500 kVA or more or advanced capacity is activated The wiring distance should be 10m Refer to Appendix B for details Zero phase Reactor Ferrite Core Common Choke optional Use zero phase reactors to reduce radio noise especially when audio equipment is installed near the inverter They are eff...

Страница 28: ...screws due to vibration Use voltage and current levels according to the specifications in Appendix A When using a GFCI Ground Fault Circuit Interrupter select a current sensor with sensitivity of 200 mA or higher and not less than 0 1 second operation time to avoid nuisance tripping For specific GFCI of the AC motor drive select a current sensor with sensitivity of 30 mA or higher Do NOT run or st...

Страница 29: ...D022EL21W 1 VFD022EL43W 1 2 5 mm2 14 AWG VFD040EL43W 1 NOTE For installation at an ambient temperature of 50 C select copper wires with temperature resistance of 75 C or 90 C For installation at an ambient temperature over 50 C select copper wires with temperature resistance of 90 C or above For installation of VFD007EL21W 1 at an ambient temperature of 40 C select copper wires with temperature re...

Страница 30: ...put voltage 23 25V load capacity 20 mA 24V terminal is only used for digital control signal common when in the internal power supply PNP mode Or used for digital control signal common when in the external power supply NPN mode For detailed wiring instructions refer to NPN and PNP mode description NOTE Do not use the 24V terminal for other external power loads to avoid damage to the hardware circui...

Страница 31: ...Control Signal Common Common for AVI NOTE Control signal wiring size 18 AWG 0 75 mm2 with shielded wire Analog inputs AVI ACM Analog input signals are easily affected by external noise Use shielded wiring and keep it as short as possible 20 m with proper grounding If the noise is inductive connecting the shield to the ACM terminal can cause improvement If the analog input signals are affected by n...

Страница 32: ... two row terminal Frame Model Wire One row terminal torque 10 Two row terminal 10 A1 VFD002EL21W 1 16 24 AWG 1 3 0 2mm2 4 kgf cm 3 5 lbf in 0 4 N m 7 kgf cm 6 2lbf in 0 7 N m VFD004EL21W 1 VFD004EL43W 1 VFD007EL21W 1 VFD007EL43W 1 A2 VFD015EL43W 1 B VFD015EL21W 1 VFD022EL21W 1 VFD022EL43W 1 VFD040EL43W 1 ...

Страница 33: ...ity to support other external accessories deduct the load consumed by corresponding MI terminals Each MI terminal consumes 6mA 2 The power supply of the cooling fan is 24VDC Internal power is applied from terminal 24V DCM Once you install a cooling fan on VFD007EL21W 1 do not connect any other external accessory to avoid overload on terminal 24V which will damage the motor drive DCM MI DC 24V 24V ...

Страница 34: ...Chapter 2 Installation and Wiring VFD EL W 2 13 This page intentionally left blank ...

Страница 35: ...rify that no other equipment is connected to the AC motor drive Do NOT operate the AC motor drive with wet hands Please check if the digital keypad displays F60 0 or F50 0 is ON when power is applied Stop the motor when a fault occurs during running and refer to Chapter 6 Fault Code Information and Maintenance for solutions DO NOT touch output terminals U V W when power is still applied to L1 R L2...

Страница 36: ...VFD EL W series operates the running and displays the functions by the digital keypad There are four LEDs on the keypad STOP Lights when the drive stops RUN Lights when the motor is running FWD Lights when the motor is running forward REV Lights when the motor is running in reverse ...

Страница 37: ... unit where U F x Pr 00 05 Displays the loading current FWD command REV command The counter value C Displays the selected parameter Displays the actual stored value of the selected parameter Displays the external fault Displays End for approximately one second as shown in the left figure if the data has been accepted and automatically stored in the register Displays if the setting data is not acce...

Страница 38: ...ng mode When operation source is digital keypad START GO START MODE MODE MODE MODE MODE NOTE In the selection mode press to set the parameters MODE or ENTER ENTER ENTER MODE or MODE MODE MODE MODE Reference Table for the Seven segment LED Display of the Digital Keypad Digit 0 1 2 3 4 5 6 7 8 9 LED Display English alphabet A b Cc d E F G Hh Ii Jj LED Display English alphabet K L n Oo P q r S Tt U L...

Страница 39: ...Chapter 3 Keypad and Start up VFD EL W 3 5 3 2 Operation Method You can set Pr 02 01 to select the operation method to be through the digital keypad RS 485 communication or control terminals ...

Страница 40: ...communication address 2000H and 2101H setting for details Operate through the digital keypad Figure 3 1 Set the frequency source through the keys as shown in Figure 3 1 Set the operation command source through the RUN STOP RESET keys as shown in Figure 3 1 Operate through external signals Figure 3 2 MI3 DCM Set Pr 04 05 d10 MI4 DCM Set Pr 04 06 d11 Set MI1 DCM as Run Stop Refer to the parameter de...

Страница 41: ...on are smooth RUN If the results of trial run are normal increase the operating frequency to continue the trial run If the trial run still goes normally then you can start the formal run Motor operating direction When the AC drive output terminals U T1 V T2 and W T3 are connected to the motor terminals U T1 V T2 and W T3 respectively the FWD LED indicator on the digital keypad is ON This means the...

Страница 42: ...Chapter 3 Keypad and Start up VFD EL W 3 8 This page intentionally left blank ...

Страница 43: ...h all parameter settings before start up without the need for re adjustment during operation The 11 groups are as follows Group 0 User Parameters Group 1 Basic Parameters Group 2 Operation Method Parameters Group 3 Output Function Parameters Group 4 Input Function Parameters Group 5 Multi Step Speed Parameters Group 6 Protection Parameters Group 7 Motor Parameters Group 8 Special Parameters Group ...

Страница 44: ... to default 50 Hz 230V 400V or 220V 380V depends on Pr 00 12 10 All parameters are reset to default 60 Hz 220V 440V 00 03 Start up Display Selection 0 F frequency command 0 1 H actual frequency 2 A output current 3 U user defined see Pr 00 04 4 FWD REV command 00 04 Content of Multi function Display 0 Display the content of user defined unit Uxxx 0 1 Display the counter value c 2 Display the statu...

Страница 45: ... attempts allowed 0 00 09 Password Set 0 9999 0 No password protection password entered correctly Pr 00 08 1 Parameter has been set 0 00 10 Control Mode 0 V F control 1 Vector control 0 00 12 50 Hz Base Voltage Selection 0 230V 400V 1 220V 380V 0 00 13 User defined value correspond to max operating frequency 0 9999 0 00 14 Decimal place of User defined Value 0 3 0 ...

Страница 46: ...el 2 0 1 600 0 0 01 600 00 sec 10 0 01 12 Deceleration Time 2 Tdecel 2 0 1 600 0 0 01 600 00 sec 10 0 01 13 Jog Acceleration Time 0 1 600 0 0 01 600 00 sec 1 0 01 14 Jog Deceleration Time 0 1 600 0 0 01 600 00 sec 1 0 01 15 Jog Frequency 0 10 400 0 Hz 6 00 01 16 Auto Acceleration and Auto Deceleration 0 Linear Acceleration and linear deceleration 0 1 Auto acceleration and linear deceleration 2 Lin...

Страница 47: ... 60 00 01 28 Delay Time of Simple Positioning Stop 0 0 00 600 00 sec 0 00 01 29 Delay Time of Simple Positioning Stop 1 0 00 01 30 Delay Time of Simple Positioning Stop 2 0 00 01 31 Delay Time of Simple Positioning Stop 3 0 00 01 32 Delay Time of Simple Positioning Stop 4 0 00 01 33 Delay Time of Simple Positioning Stop 5 0 00 01 34 Delay Time of Simple Positioning Stop 6 0 00 01 35 Delay Time of ...

Страница 48: ...12 kHz 8 02 04 Motor Direction Control 0 Forward reverse operation enabled 0 1 Reverse operation disabled 2 Forward operation disabled 02 05 Power On Command and Run Command Source Modifies the Drive Operating Control 0 Start running when power is on 1 Do not run when power is on 2 When the source of the command changes the drive s operation remains the same 3 When the source of the command change...

Страница 49: ...requency Command 0 00 400 0 Hz 60 00 02 13 Saving Keypad or Communication Frequency Command Selection 0 Save Keypad Communication Frequency 0 1 Save Keypad Frequency Only 2 Save Communication Frequency Only 02 14 Initial Frequency Selection for keypad RS 485 0 Current Frequency Command 0 1 Zero Frequency Command 2 Refer to Pr 02 15 to set up 02 15 Initial Frequency Setting for keypad RS 485 0 00 4...

Страница 50: ...mmand 19 Zero speed output signal 20 Warning 21 Mechanical brake control Desired frequency reached 22 Drive ready 23 Multi pump system error display only master 24 Preheating function indication 25 Fire mode indication 03 02 Desired Frequency Reached 0 00 400 0 Hz 0 00 03 05 Terminal Count Value 0 9999 0 03 06 Preliminary Count Value 0 9999 0 03 07 EF Active when Terminal Count Value Reached 0 Ter...

Страница 51: ...eter Function Setting Default Customer 03 11 Mechanical Brake Release Frequency 0 00 20 00 Hz 0 00 03 12 Mechanical Brake Engage Frequency 0 00 20 00 Hz 0 00 03 13 Display the Status of the Multi function Output Terminals Read only Read only ...

Страница 52: ...o function 04 06 Start up Stop or Multi function Input Terminal MI2 1 Multi step speed command 1 1 04 07 Start up Stop or Multi function Input Terminal MI3 2 Multi step speed command 2 2 04 08 Multi function Input Terminal MI4 3 Multi step speed command 3 3 5 External reset 6 Accel decel inhibit 7 The 1st 2nd acceleration or deceleration time selection 8 JOG operation control 9 External Base Block...

Страница 53: ...ercentage of Pr 01 00 0 00 100 00 100 corresponds to Fmax Pr 01 00 0 0 04 17 Maximum ACI Current 0 0 20 0 mA 20 0 04 18 Maximum ACI Frequency percentage of Pr 01 00 0 00 100 00 100 corresponds to Fmax Pr 01 00 100 0 04 19 MI Terminal Control Mode Selection 0 Mode 1 MI1 Start up Stop terminal MI2 MI3 multi function input terminals 1 Mode 2 MI1 MI2 MI3 support two wire three wire start up 0 04 26 Di...

Страница 54: ...Chapter 4 Parameters VFD EL W 4 12 Parameter Function Setting Default Customer 04 34 Delay Time of Multi function Input Terminal MI3 Turn Off 0 00 360 00 sec 0 00 ...

Страница 55: ...peed Frequency 0 00 400 0 Hz 0 00 05 01 2nd Step Speed Frequency 0 00 400 0 Hz 0 00 05 02 3rd Step Speed Frequency 0 00 400 0 Hz 0 00 05 03 4th Step Speed Frequency 0 00 400 0 Hz 0 00 05 04 5th Step Speed Frequency 0 00 400 0 Hz 0 00 05 05 6th Step Speed Frequency 0 00 400 0 Hz 0 00 05 06 7th Step Speed Frequency 0 00 400 0 Hz 0 00 ...

Страница 56: ... Torque Detection Level 10 200 150 06 05 Over Torque Detection Time 0 1 60 0 sec 0 1 06 06 Electronic Thermal Overload Relay Selection oL1 0 Standard motor self cooled by fan 2 1 Special motor forced external cooling 2 Disabled 06 07 Electronic Thermal Characteristic 30 600 sec 60 06 08 Present Fault Record 0 No fault 0 06 09 Second Most Recent Fault Record 1 Over current oc 2 Over voltage ov 06 1...

Страница 57: ...6 W phase error cF3 2 27 DC bus error cF3 3 28 IGBT Overheat error cF3 4 34 Motor PTC overheat protection PtC1 35 FBE_ERR PID feedback error Incorrect feedback signal 36 dEv unusual PID feedback deviation 37 OPHL 06 13 Motor Disconnection Detection Time 0 0 60 0 0 0 Disable the OPHL detection function 0 0 06 14 Motor Disconnection Detection Current Level 10 100 30 ...

Страница 58: ...or 0 0 00 20 00 Hz 3 00 07 07 Slip Compensation Limit 0 250 200 07 08 Torque Compensation Time Constant 0 01 10 00 sec 0 10 07 09 Slip Compensation Time Constant 0 05 10 00 sec 0 20 07 10 Accumulated Motor Operation Time Minute 0 1439 Min 0 07 11 Accumulated Motor Operation Time Day 0 65535 Day 0 07 12 Motor PTC Overheat Protection 0 Disable 1 Enable 0 07 13 Motor PTC Protection Input Response Tim...

Страница 59: ...0 sec 0 5 08 08 Current Limit for Speed Search 30 200 150 08 09 Skip Frequency 1 Upper Limit 0 00 400 00 Hz 0 00 08 10 Skip Frequency 1 Lower Limit 0 00 400 00 Hz 0 00 08 11 Skip Frequency 2 Upper Limit 0 00 400 00 Hz 0 00 08 12 Skip Frequency 2 Lower Limit 0 00 400 00 Hz 0 00 08 13 Skip Frequency 3 Upper Limit 0 00 400 00 Hz 0 00 08 14 Skip Frequency 3 Lower Limit 0 00 400 00 Hz 0 00 08 15 Number...

Страница 60: ...Chapter 4 Parameters VFD EL W 4 18 Parameter Explanation Settings Default Customer 08 25 Number of Fire Mode Actions Refer to parameter description Read only ...

Страница 61: ...09 02 Transmission Fault Action 0 Warn and keep operating 3 1 Warn and ramp to stop 2 Warn and coast to stop 3 No warning and keep operating 09 03 Time out Detection 0 0 120 0 sec 0 0 Disable 0 0 09 04 Communication Protocol 0 7 N 2 Modbus ASCII 0 1 7 E 1 Modbus ASCII 2 7 O 1 Modbus ASCII 3 8 N 2 Modbus RTU 4 8 E 1 Modbus RTU 5 8 O 1 Modbus RTU 6 8 N 1 Modbus RTU 7 8 E 2 Modbus RTU 8 8 O 2 Modbus ...

Страница 62: ... D 0 00 1 00 sec 0 00 10 05 Upper Bound for Integral Control 0 100 100 10 06 PID Filter Time 0 0 2 5 sec 0 0 10 07 PID Output Frequency Limit 0 110 100 10 08 PID Feedback Signal Detection Time 0 0 3600 0 sec 60 0 10 09 Erroneous PID Feedback Signal Action 0 Warn and ramp to stop 0 1 Warn and coast to stop 2 Warn and keep operation 10 10 Gain Over the PID Detection Value 0 0 10 0 1 0 10 11 PID Set ...

Страница 63: ...isable 0 10 26 Time Setting for Liquid Leakage Change 0 1 10 0 sec 0 disable 0 5 10 35 Multi Pump Control Mode 0 Disable 1 Fixed Time Circulation alternative operation 2 Fixed quantity control multi pump operating at constant pressure 0 10 36 Multi pump ID 0 Multi pump control mode is disabled 1 Master 2 4 Slave 0 10 37 Multi pump s Fixed Time Circulation Period 1 65535 minute 60 10 38 Frequency t...

Страница 64: ...he master pump does not receive the RUN command 1 When an error occurs in the running pump the master pump can choose to run with an alternative pump instead of the erroneous pump 10 44 Selection of Pump s Start up Sequence 0 By pump ID 1 By running time 1 10 45 Running Time of Multi pump Under Alternative Operation 0 0 360 0 sec 60 0 10 49 Specify the Setting for Pr 10 12 PID Deviation Level 0 Us...

Страница 65: ...s full power acceleration and deceleration For precision machinery it also helps reduce vibration 08 17 Eight step Speed Operation Applications Purpose Functions Related Parameters Conveying machinery Cyclic operation at multi step speed To control eight step speed including master frequency and duration by simple contact signals 04 06 04 08 05 00 05 06 Switching Acceleration and Deceleration Time...

Страница 66: ...lated Parameters Pumps fans and extruders To protect machines and for continuous reliable operation Set the over torque detection level When OC stall OV stall or over torque occurs the drive automatically adjusts the output frequency It is suitable for machines like fans and pumps that require continuous operation 06 00 06 05 Upper Lower Limit Frequency Applications Purpose Functions Related Param...

Страница 67: ...Applications Purpose Functions Related Parameters General application machine tools Provide a signal for running status When the drive s output frequency reaches the set frequency from the frequency command gives a signal for an external system or control wiring frequency reached 03 00 Output Signal at Over torque Applications Purpose Functions Related Parameters Machine tools fans pumps and extru...

Страница 68: ...n Provide a signal for running status When executing a Base Block gives a signal for an external system or control wiring 03 00 Overheating Warning for Heat Sink Applications Purpose Functions Related Parameters General application For safety When the heat sink overheats gives a signal for an external system or control wiring 03 00 ...

Страница 69: ... 00 3 5 7 9 11 Rated Output Current A 1 5 2 5 4 2 5 5 9 0 Max Carrier Frequency 12 kHz 00 02 Parameter Reset Default 0 Settings 0 Parameter can be read written 1 All parameters are read only 8 Keypad lock 9 Reset all parameters to defaults 50Hz 230V 400V or 220V 380V depending on Pr 00 12 10 Reset all parameters to defaults 60Hz 220V 440V 9 or 10 Resets all parameters to defaults when the paramete...

Страница 70: ...defined unit U Output frequency H User defined Coefficient K Pr 00 05 00 06 Software Version Settings Read Only Default 00 07 Reserved 00 08 Password Input Unit 1 Settings 0 9999 Default 0 Displayed value 0 2 is the number of wrong password attempts Enter the password that is set in Pr 00 09 Enter the correct password here to enable changing parameter settings You are limited to a maximum of three...

Страница 71: ...of motor s torque in a weaken low frequency magnetic field To solve this problem set Pr 07 02 Torque Compensation to compensate torque then to have the best operating performance Common applications are water pumps conveyors compressors and treadmills Vector Control The vector control mode can eliminate the relationship between the field current vector and the armature flux and auto tune the torqu...

Страница 72: ...cording to Pr 00 13 including the UP DOWN key on keypad potentiometer multi step speed function and JOG function When Pr 00 13 is not set to 0 and the frequency source is from communications use Pr 02 18 to change the frequency command instead of using communication address 2001H 00 14 Decimal Place of User defined Value Settings 0 3 Default 0 Sets the place of decimal point for Pr 00 13 Example I...

Страница 73: ...ttings 0 10 400 0Hz Default 1 50 Sets the Mid Point Frequency of any V F curve This setting determines the V F ratio between the Minimum Frequency and the Mid Point frequency 01 04 Mid Point Voltage Vmid Unit 0 1 Settings 230V series 0 1 255 0 V Default 10 0 460V series 0 1 510 0 V Default 20 0 For 230V series the default is 10 0 V for 460V series the default is 20 0 V Sets the Mid Point Voltage o...

Страница 74: ...s 60 Hz the maximum output frequency will not be larger than 60 Hz even executing slip compensation If the output frequency must be larger than 60 Hz adjust the output frequency upper limit or increase the maximum operation frequency 01 09 Acceleration Time 1 Taccel 1 Unit 0 1 0 01 01 10 Deceleration Time 1 Tdecel 1 Unit 0 1 0 01 01 11 Acceleration Time 2 Taccel 2 Unit 0 1 0 01 01 12 Deceleration ...

Страница 75: ... to 8 When the Jog command is ON the AC motor drive accelerates from the Minimum Output Frequency Pr 01 05 to the Jog Frequency Pr 01 15 When the Jog command is OFF the AC motor drive decelerates from the Jog Frequency to zero The acceleration deceleration time is set by the Jog Acceleration Deceleration time Pr 01 13 Pr 01 14 The drive must be stopped before using the JOG command During Jog opera...

Страница 76: ...tion S Curve Unit 0 1 0 01 01 18 Deceleration S Curve Unit 0 1 0 01 Default 0 0 0 00 Settings 0 0 S curve disabled 0 1 10 0 0 01 10 00 S curve enabled 10 0 10 00 is the smoothest Ensure smooth acceleration and deceleration using an S curve 0 Disables the S curve function 0 1 10 0 0 01 10 00 Enables the S curve function Setting the parameter to 0 1 0 01 gives the shortest S curve and setting the pa...

Страница 77: ...ec Default 0 00 01 30 Delay Time of Simple Positioning Stop 2 Unit 0 01 Settings 0 00 600 00 sec Default 0 00 01 31 Delay Time of Simple Positioning Stop 3 Unit 0 01 Settings 0 00 600 00 sec Default 0 00 01 32 Delay Time of Simple Positioning Stop 4 Unit 0 01 Settings 0 00 600 00 sec Default 0 00 01 33 Delay Time of Simple Positioning Stop 5 Unit 0 01 Settings 0 00 600 00 sec Default 0 00 01 34 De...

Страница 78: ...figure below assume that the radius of the four pole motor is r and rotation speed is n RPM r n Example 1 When the motor swivel table rotates at 50 Hz and Pr 02 02 4 Simple Positioning Stop E F coast to stop and Pr 01 26 50 Hz Simple Positioning Stop Frequency 6 and its corresponding Pr 01 34 2 sec Delay Time of Simple Positioning Stop 6 then the deceleration time from 50 Hz to 0 Hz is 10 seconds ...

Страница 79: ...e Positioning Stop 2 then the deceleration time from 60 Hz to 0 Hz is 40 seconds The delay time at stop for 1 5 Hz is 1 5 second the deceleration time from 1 5 Hz to 0 Hz is 1 second After executing the stop command Simple Positioning Stop activates its rotation speed is n 120 x 1 5 4 revolution minute 1 5 2 revolution second The number of revolution of the swivel table 1 5 2 x 1 5 2 5 2 1 5 revol...

Страница 80: ... enabled 4 RS 485 communication Keypad STOP RESET disabled Sets the operation command source of the drive 02 10 Combining the First and Second Master Frequency Commands Default 0 Settings 0 First Master Frequency Command Only 1 First Master Frequency Second Master Frequency 2 First Master Frequency Second Master Frequency 02 02 Stop Method Default 0 Settings 0 STOP ramp to stop E F coast to stop 1...

Страница 81: ...tings 2 12 kHz Determines the PWM carrier frequency of the AC motor drive 2kHz 8kHz 12kHz Carrier Frequency Acoustic Noise Electromagnetic Noise or leakage current Heat Dissipation Current Wave Significant Minimal Significant Minimal Minimal Significant Minimal Significant From the table you can see that the PWM carrier frequency has a significant influence on the electromagnetic noise AC motor dr...

Страница 82: ...he installation method is single drive installation and the carrier frequency is 12 kHz then the drive reaches 100 of the rated current NOTE Other models VFD002EL21W 1 VFD004EL21W 1 VFD015EL21W 1 VFD022EL21W 1 VFD004EL43W 1 VFD007EL43W 1 VFD015EL43W 1 VFD022EL43W 1 VFD040EL43W 1 02 04 Motor Direction Control Default 0 Settings 0 Forward Reverse operation enabled 1 Reverse operation disabled 2 Forw...

Страница 83: ...ter an instantaneous power failure When the motor drive has an instantaneous power failure the DC bus decreases to Lv If you send a command from the host computer while the DC bus is at Lv and the operating command is still on conductive trigger the motor drive can be restarted Power on When the operation command source is the external terminal and the operation command is ON MI1 DCM closed the AC...

Страница 84: ...Accel Decel Time 2 Constant speed according to Pr 02 08 3 Pulse input unit according to Pr 02 08 02 08 Accel Decel Rate of Change of UP DOWN Operation with Constant Speed Unit 0 01 Settings 0 01 10 00 Hz 2ms Default 0 01 Determine the increase decrease of the master frequency when operated through the multi function inputs and you set Pr 04 06 Pr 04 08 10 Up command or 11 Down command Pr 02 07 0 U...

Страница 85: ...2 16 Display the Master Frequency Command Source Settings Read Only Default Read Only You can read the master frequency command source from this parameter Display Value Bit Function 1 bit0 1 The Master Frequency Command Source is the First Master Frequency Source Pr 02 00 2 bit1 1 The Master Frequency Command Source is the Second Master Frequency Source Pr 02 09 4 bit2 1 The Master Frequency Comma...

Страница 86: ...ed value 1 is set to 180 0 Pr 00 13 is set to 1800 Pr 00 14 is set to 1 When AVI 2V the user defined value is 36 0 180 0 2V 10V and the frequency is 12 0 Hz 36 0 180 0 60 0 When Pr 02 18 30 0 the frequency is 10 0 Hz 30 0 60 0 180 0 At this time the keypad displays 66 0 36 0 30 0 and the output frequency is 22 0 Hz 12 0 10 0 If you read the values by using the communication address the values disp...

Страница 87: ...3 02 is reached 10 Terminal Count Value Reached Active when the counter reaches the Terminal Count Value 11 Preliminary Count Value Reached Active when the drive executes the external counter if the count value is equal to the setting value for Pr 03 06 12 Over voltage Stall Prevention Active when the Over voltage Stall Prevention function is operating 13 Over current Stall Prevention Active when ...

Страница 88: ...tion output timing chart of multiple function terminals when setting to frequency attained or zero speed indication 03 03 Reserved 03 04 Reserved 03 05 Terminal Count Value Unit 1 Settings 0 9999 Default 0 Sets the count value of the internal counter You can use the external multi function input terminals on the control terminals to trigger the counter When the count reaches the setting value the ...

Страница 89: ...ve stops the fan is OFF 2 Fan is ON when the AC motor drive runs fan is OFF when the AC motor drive stops 3 4 Fan is ON when the preliminary heat sink temperature is reached Fan is ON when the AC motor drive runs fan is OFF when the AC motor drive stops And the fan is in a standby mode at 0 Hz Determines the operation mode of the cooling fan This parameter is only valid for fan cooling models The ...

Страница 90: ...reaches Pr 03 11 Mechanical Brake Release Frequency the multi function output terminal is closed When the output frequency reaches Pr 03 12 Mechanical Brake Engage Frequency the multi function output terminal is open 03 13 Display the Status of the Multi function Output Terminals Settings Read Only Default Read Only For the standard AC motor drive the multi function output terminals are falling ed...

Страница 91: ...meters Refer to the following examples to know how to use it As shown in the left figure below operating the potentiometer on the digital keypad to the leftmost means the minimum value that the lowest voltage 0 VDC corresponds to As shown in the right figure below operating the potentiometer on the digital keypad to the rightmost means the maximum value that the highest voltage 5 VDC corresponds t...

Страница 92: ... 5 V min max 0 60 Hz to 0 4 V 0 60 Hz Therefore the 4 V and above from the keypad potentiometer all correspond to 60 Hz To use the full potentiometer range refer to Example 3 Example 3 As shown in this example the keypad potentiometer can be used for all ranges of 0 5 V 0 60 Hz settings This increases flexibility Example 4 This example shows how to use the first half range 0 2 5 V min 1 2 max from...

Страница 93: ...mple uses a negative bias to provide a noise margin In additional it uses a potentiometer frequency gain to reach the Maximum Output Frequency Example 7 In this example you perform the input to run the motor in both the forward and reverse directions The motor is idle when the potentiometer position is at its mid point Using the settings in this example disables the external FWD and REV controls ...

Страница 94: ... of Pr 01 00 Unit 0 1 Default 100 00 Settings 0 00 100 00 100 corresponds to Fmax Pr 01 00 04 15 Minimum ACI Current Unit 0 1 Default 4 0 Settings 0 0 20 0 mA 04 16 Minimum ACI Frequency percentage of Pr 01 00 Unit 0 1 Default 0 0 Settings 0 00 100 00 100 corresponds to Fmax Pr 01 00 04 17 Maximum ACI Current Unit 0 1 Default 20 0 Settings 0 0 20 0 mA 04 18 Maximum ACI Frequency percentage of Pr 0...

Страница 95: ...re three wire start up Determines the MI terminal control modes Mode 1 MI1 is the start up stop terminal MI2 and MI3 are the multi function input terminals Mode 2 MI1 MI2 and MI3 support the two wire three wire start up 04 20 Reserved 04 21 Reserved 04 22 Reserved 04 23 Reserved 04 24 Reserved 04 25 Reserved 04 04 Start up Stop Method of MI Terminals and Multi function Input Selection Default 0 Se...

Страница 96: ...des Setting for Pr 04 19 Setting for Pr 04 04 External terminal control circuit Mode 1 Pr 04 19 0 Pr 04 04 0 Single wire FWD STOP Mode 2 Pr 04 19 1 Pr 04 04 0 Two wire 1 FWD STOP REV STOP Pr 04 04 1 Two wire 2 RUN STOP REV FWD Pr 04 04 2 Three wire Operation Control 04 05 Reserved 04 06 Start up Stop or Multi function Input Terminal MI2 Default 1 04 07 Start up Stop or Multi function Input Termina...

Страница 97: ...tops completely While running you can still change the operation direction and the STOP key on the keypad is valid Once the external terminal receives the OFF command the motor stops in the JOG deceleration time Refer to Pr 01 13 Pr 01 15 for details 9 External Base Block Refer to Pr 08 06 When the AC motor drive receives a Base Block signal it blocks all output and the motor coasts When Base Bloc...

Страница 98: ...ting When 18 19 and 20 are ON at the same time the priority is settings 18 setting 19 setting 20 19 Operation Command Selection Pr 02 01 setting Digital Keypad ON Operation command through Digital Keypad OFF Operation command through Pr 02 01 setting When 18 19 and 20 are ON at the same time the priority is setting 18 setting 19 setting 20 20 Operation Command Selection Pr 02 01 setting Communicat...

Страница 99: ...O or N C MI1 MI2 are only controlled by external terminals Three wire 1 2 0 1 MI4 can be set as N O or N C MI1 MI2 MI3 are only controlled by external terminals Setting method When setting this parameter covert Bit3 Bit0 that represent the status of MI4 MI1 from binary to decimal For example setting MI3 and MI4 to be 1 N C seting MI1 and MI2 to be 0 N O The setting value for Pr 04 09 should be 12 ...

Страница 100: ...or external terminal You can activate internal terminals with Pr 04 28 A terminal cannot be both an internal terminal and an external terminal at the same time When setting this parameter convert Bit3 Bit0 that represent the status of MI4 MI1 from binary to decimal Set MI3 and MI4 as internal terminals set MI1 and MI2 as external terminals Pr 04 27 should be set to 12 Sets the internal terminal ac...

Страница 101: ...e product arrives Therefore this delay time function is added for the convenience of tuning 04 29 Delay Time of Multi function Input Terminal MI1 Turn On Settings 0 00 360 00 sec Default 0 00 04 30 Delay Time of Multi function Input Terminal MI1 Turn Off Settings 0 00 360 00 sec Default 0 00 04 31 Delay Time of Multi function Input Terminal MI2 Turn On Settings 0 00 360 00 sec Default 0 00 04 32 D...

Страница 102: ...y Unit 0 01 Settings 0 00 400 00Hz Default 0 00 The multi function input terminals refer to Pr 04 06 Pr 04 08 select one of the AC motor drive multi step speeds maximum of seven speeds The speeds frequencies are determined by Pr 05 00 Pr 05 06 as shown in the following table Parameter Multi step speed command 1 Multi step speed command 2 Multi step speed command 3 Master frequency Master speed OFF...

Страница 103: ... However when the load inertia is large the AC motor drive automatically increases the deceleration time until it stops You can also install a brake resistor to absorb the excessive regenerative voltage If the deceleration time affects your application it is not recommended to use this function high voltage at DC side over voltage detection level output frequency time Deceleration characteristic w...

Страница 104: ...ing operation 06 03 Over torque Detection Mode OL2 Default 0 Settings 0 Over torque detection disabled 1 Over torque detection enabled during constant speed operation After over torque is detected keep running until OL1 or OL occurs 2 Over torque detection enabled during constant speed operation After over torque is detected stop running 3 Over torque detection enabled during acceleration After ov...

Страница 105: ...rotects the motor from overloading or overheating When the motor self cooled by fan operates in low frequency overloads rarely happen Refer to the following figures 40 20 60 80 100 25 50 100 150 rated frequency of the motor rated current of the m otor Standard motor self cooled by fan rated frequency of the motor rated current of the motor Special Motor forced external cooling 25 50 100 150 40 20 ...

Страница 106: ... phase error cF3 2 27 DC bus error cF3 3 28 IGBT Overheat error cF3 4 29 31 Reserved 32 Reserved 33 Reserved 34 Motor PTC overheat protection PtC1 35 FBE_ERR PID feedback error Incorrect feedback signal 36 dEv unusual PID feedback deviation 37 OPHL 38 40 Reserved Pr 06 08 to Pr 06 12 store the five most recent faults that occurred After clearing the cause of the faults use the RESET command to res...

Страница 107: ... tuning R1 Motor does not run 2 Auto tuning R1 No load current with running motor Default 0 Start auto tuning by pressing the RUN key after you set this parameter to 1 or 2 1 Auto detect only the R1 value and manually enter Pr 07 01 2 Unload the AC motor drive and automatically set the values for Pr 07 01 and Pr 07 05 The steps for auto tuning are 1 Ensure that all the parameters are set to defaul...

Страница 108: ...ettings 0 250 Default 200 This parameter sets the upper limit of the compensation frequency the percentage of Pr 07 06 If the motor speed is lower than the target speed and the speed does not change after adjusting the Pr 07 03 setting the AC motor drive may reach the upper limit of the compensation frequency and you may need to increase the Pr 07 07 setting Related parameters Pr 07 03 Slip Compen...

Страница 109: ...unction uses the AVI input and is connected with a resistor divider as shown in the diagram below 1 The voltage between 10 V to ACM between 10 4 11 2 V 2 The impedance for AVI is around 47 kΩ 3 The recommended value for the resistor divider R1 is 1 10 kΩ 4 Please contact your motor dealer for the temperature curve and resistance value for the PTC function Refer to the following calculation for the...

Страница 110: ...tor PTC Overheat Action Default 0 Settings 0 Warn and ramp to stop 1 Warn and coast to stop 2 Warn and keep operating If the temperature exceeds the motor PTC Overheat Warning Level Pr 07 15 the drive acts according to Pr 07 17 and displays PtC2 on the digital keypad If the temperature decreases below the result of Pr 07 15 minus Pr 07 16 the warning message disappears 07 13 Motor PTC Protection I...

Страница 111: ...top Method to 0 or 2 for Ramp to Stop 08 03 Start point for DC Brake Unit 0 01 Settings 0 00 400 00 Hz Default 0 00 Determines the frequency at which the DC Brake is applied during deceleration Use the DC Brake during Start up for loads that may move before the AC drive starts such as fans and pumps The DC Brake can hold the load in position before starting the motor Use the DC Brake during stoppi...

Страница 112: ...archSpeed FWD Run Time B B Fig 1 B B Speed Search with Last Output Frequency Downward Timing Chart Speed Search Current Attains Speed Search Level A Input B B signal Stop output voltage Disable B B signal Waiting time 08 07 Speed Search Synchronization speed detection Time B B Fig 2 B B Speed Search with Last Output Frequency Downward Timing Chart Speed Search Current doesn t Attain Speed Search L...

Страница 113: ... Frequency 1 Lower Limit Unit 0 01 08 11 Skip Frequency 2 Upper Limit Unit 0 01 08 12 Skip Frequency 2 Lower Limit Unit 0 01 08 13 Skip Frequency 3 Upper Limit Unit 0 01 08 14 Skip Frequency 3 Lower Limit Unit 0 01 Settings 0 00 400 00 Hz Default 0 00 These parameters cause the AC motor drive not to remain in these frequency ranges with continuous frequency output Set these six parameters as follo...

Страница 114: ...VAC 50 60 Hz Therefore when you use the AC motor drive without the AVR function the output voltage is the same as the input voltage When the motor runs at voltages exceeding the rated voltage by 12 20 the motor s lifetime is shortened and the motor can be damaged due to higher temperature failing insulation and unstable torque output The AVR function automatically regulates the AC motor drive outp...

Страница 115: ...topping time is five seconds When the AC motor drive stops running continuous DC current automatically and cyclically input to the motor When you use this parameter with MI 26 Auto trigger preheating function this parameter works with the MI signal continuously and cyclically until the AC motor drive starts the motor operation or MI 26 is disabled The preheating function works when Pr 08 21 and Pr...

Страница 116: ...e fire mode action and its number of occurrences are recorded Note that this parameter is read only Any parameter value that is not zero voids the warranty Fire mode end process flow If you set the Pr 04 06 Pr 04 08 multi function input terminal 27 28 to ON or the communication address to 2002H with bit5 1 fire mode enabled and the fire mode is enabled for more than four minutes and then you set t...

Страница 117: ...urrent during normal speed ocN V V 12 Reserved 13 Low voltage LV V V 14 Input phase loss PHL V V 15 base block bb V V 16 Auto acceleration deceleration failure cFA V V 17 Software parameter protection failure code V V 18 Internal EE parameter OM cannot write cF10 V V 19 Internal EE parameter OM cannot read cF20 V V 20 Hardware NMI HPF1 V V 21 Hardware OV HPF2 V V 22 Reserved 23 Hardware OC HPF4 V ...

Страница 118: ...n speed between the RS 485 master such as PC and the AC motor drive 09 02 Transmission Fault Action Default 3 Settings 0 Warn and keep operating 1 Warn and ramp to stop 2 Warn and coast to stop 3 No warning and keep operating Determines how the AC motor drive reacts if a transmission fault occurs 09 03 Time out Detection Unit 0 1 Settings 0 0 120 0 sec Default 0 0 0 0 Disable If Pr 09 03 is not eq...

Страница 119: ...et therefore there is at least 1 second delay time in the master station ASCII mode Each 8 bit data is the combination of two ASCII characters For example a 1 byte data 64 Hex shown as 64 in ASCII consists of 6 36Hex and 4 34Hex Character 0 1 2 3 4 5 6 7 ASCII code 30H 31H 32H 33H 34H 35H 36H 37H Character 8 9 A B C D E F ASCII code 38H 39H 41H 42H 43H 44H 45H 46H RTU mode Each 8 bit data is the c...

Страница 120: ...or RTU 8 N 2 Start bit 0 1 2 3 4 5 6 Stop bit 8 data bits 11 bits character frame Stop bit 7 8 E 1 Start bit 0 1 2 3 4 5 6 Stop bit 8 data bits 11 bits character frame 7 Even parity 8 O 1 Start bit 0 1 2 3 4 5 6 Stop bit 8 data bits 11 bits character frame 7 Odd parity 8 N 1 Start bit 0 1 2 3 4 5 6 Stop bit 8 data bits 10 bits character frame 7 8 E 2 Start bit 0 1 2 3 4 5 6 Stop bit 8 data bits 12...

Страница 121: ...t interval of more than 10 ms Address Communication address 8 bit address Function Command code 8 bit command DATA n 1 to DATA 0 Contents of data n 8 bit data n 40 20 x 16 bit data CRC CHK Low CRC checksum 16 bit checksum consists of two 8 bit characters CRC CHK High END A silent interval of more than 10 ms 2 Address Communication Address Valid communication addresses are between 0 254 A communica...

Страница 122: ...by byte 0 1 4 0 Content of starting address 2102H 1 2 7 Number of data count by word 0 7 0 0 0 Content of address 2103H 0 2 0 LRC Check D 0 7 0 END CR LRC Check 7 LF 1 END CR LF RTU mode Command message Response message Address 01H Address 01H Function 03H Function 03H Starting data address 21H Number of data count by byte 04H 02H Number of data count by word 00H Content of address 2102H 17H 02H 7...

Страница 123: ...ng Exclusive OR the CRC register with the polynomial value A001H then repeat step 3 Step 5 Repeat step 3 and 4 until eight shifts have been performed When this is done a complete 8 bit byte will have been processed Step 6 Repeat step 2 to 5 for the next 8 bit byte of the command message Continue doing this until all bytes have been processed The final content of the CRC register is the CRC value W...

Страница 124: ...0B REV 11B Change direction bit 6 7 00B Comm forced first acceleration deceleration 01B Comm forced second acceleration deceleration bit 8 15 Reserved 2001H Frequency command 2002H bit 0 1 E F external fault ON bit 1 1 Reset bit 2 1 B B ON bit 3 4 bit 6 15 Reserved Fire mode enabled 2002H Bit 5 00B No function 01B Fire mode enabled Does not include the running commands Status monitor Read only 210...

Страница 125: ...01H Status of the AC motor drive bit 0 1 00B RUN LED is off STOP LED is on the AC motor drive stops 01B RUN LED blinks STOP LED is on when the AC motor drive decelerates to stop 10B RUN LED is on STOP LED blinks when the AC motor drive is in standby 11B RUN LED is on STOP LED is off when the AC motor drive runs bit 2 1 JOG command bit 3 4 00B FWD LED is on REV LED is off when the AC motor drive ru...

Страница 126: ...sponse is returned to the master device The AC motor drive does not receive the messages due to a communication error and the AC motor drive has no response The master device eventually processes a time out condition The AC motor drive receives the messages without a communication error but cannot handle them An exception response is returned to the master device and a fault message CExx displays ...

Страница 127: ...in the C language include stdio h include dos h include conio h include process h define PORT 0x03F8 the address of COM1 the address offset value relative to COM1 define THR 0x0000 define RDR 0x0000 define BRDL 0x0000 define IER 0x0001 define BRDH 0x0001 define LCR 0x0003 define MCR 0x0004 define LSR 0x0005 define MSR 0x0006 unsigned char rdat 60 read 2 data from address 2102H of AC drive with add...

Страница 128: ...s VFD EL W 4 86 09 06 Reserved 09 07 Response Delay Time Unit 1 Settings 0 200 1 unit 2 ms Default 1 Sets the response delay time after the AC motor drive receives a communication command as shown in the following diagram ...

Страница 129: ...system oscillation and instability If you set the other two gains I and D to zero proportional control is the only effective parameter 10 03 Integral Time I Unit 0 01 Settings 0 00 100 00 sec Default 1 00 0 00 Disable Use the integral controller to eliminate the error during stable system operation The integral control does not stop working until the error is zero The integral is affected by the i...

Страница 130: ...achine damage 10 06 PID Filter Time Unit 0 1 Settings 0 0 2 5 sec Default 0 0 The output for PID filter time helps reduce the system oscillation Refer to the following closed loop control diagram P 10 02 I 10 03 D 10 04 10 05 10 10 10 07 10 06 10 01 Setpoint Input Freq Gain PID feedback Integral gain limit Output Freq Limit Digital filter Freq Command 10 07 PID Output Frequency Limit Unit 1 Settin...

Страница 131: ...iate difference between them 5 Hz or above to prevent frequent switching between the two frequency status The sleep frequency Pr 10 15 setting must be higher than the Pr 01 08 output frequency lower limit to prevent being in sleep mode The sleep frequency Pr 10 15 setting must be higher than the Pr 01 05 minimum output frequency Sleep wake up mode status description for the AC motor drive When the...

Страница 132: ...y status 10 17 PID Offset Default 0 00 Settings 0 00 60 00 Hz Selects the minimum output frequency in the PID control mode according to your applications 10 18 Feedback of PID Physical Quantity Value Unit 0 1 Settings 1 0 99 9 Default 99 9 When you set Pr 00 04 to 8 00 00 displays see the figure below Use this parameter only for display This parameter does not relate to Pr 00 13 Pr 00 14 Pr 02 18 ...

Страница 133: ...Level Unit 1 Settings 0 9999 sec Default 60 10 22 Set Point Deviation Level Unit 1 Settings 0 100 Default 0 10 23 Detection Time of Set Point Deviation Level Unit 1 Settings 1 9999 sec Default 10 Pr 10 22 is based on the set point set by the PID control When the deviation is less than Pr 10 22 and the time exceeds Pr 10 23 setting the AC motor drive decelerates to stop to be in a standby status wi...

Страница 134: ...o run in order to keep the system stable Liquid Leakage Usage Deviation Level Detection set point feedback value 10 25 10 26 Example Assume that the set point of a constant pressure control for a pump is 4 kg Pr 10 22 5 Pr 10 23 15 seconds Pr 10 24 25 Pr 10 25 3 and Pr 10 26 0 5 second then the deviation is 0 2 kg 4 kg X 5 0 2 kg That is when the feedback value is higher than 3 8 kg and the time e...

Страница 135: ...e Detected When Pump Reaches the Stopping Frequency Settings 0 0 3600 0 sec Default 1 0 This parameter is only valid for master pump settings This parameter is only valid for fixed quantity control multi pump operating at constant pressure mode When the master pump s operating frequency Pr 10 38 and the time exceeds Pr 10 39 slave pump 1 activates If the quantity of water is still insufficient sla...

Страница 136: ...or occurs in the running pump the master pump does not receive the RUN command 1 When an error occurs in the running pump the master pump can choose to run with an alternative pump instead of the erroneous pump Example When Bit2 0 the master pump does not receive the RUN command when an error occurs in drive 2 When Bit2 1 the master pump receives the RUN command and choose to run with an alternati...

Страница 137: ...t is the physical quantity 1 kg and if the set point 3 kg and feedback 1 kg then the AC motor drive follows the setting for Pr 10 20 10 50 Number of Times of Restart after PID Fault Settings 0 1000 times Default 0 When you set Pr 10 20 4 this parameter sets the number of times to restart when PID error occurs ...

Страница 138: ...r each AC motor drive Pr 00 04 Content of Multi function Display Setting 5 Display the PID analog feedback signal value in b or 8 Display the setting values for PID control and feedback signal Pr 00 13 User defined Value Pr 00 14 Decimal Place of User defined Value Pr 10 18 Feedback of PID Physical Quantity Value 5 Stopping Detection Function All drives must have the stopping detection function Se...

Страница 139: ...an two pumps use RMKE HUB01 to connect RJ45 RJ45 Female Connector RMKE HUB01 RS 485 One wire to Two wire 2 Use a RJ11 6 pin cable with an adapter to connect the master slave communication port VFD CMD04 RS 485 RJ11 Four port communication breakout box Case For alternative operation of multi pump Pr 10 35 1 Fixed Time Circulation Enables four pumps to operate alternatively by time to extend their l...

Страница 140: ...ignal value in b 6 Display the output power factor angle n 7 Display the output power P 8 Display the setting values for PID control and feedback signal 9 Display the AVI I V 10 Display the ACI mA V i 11 Display the temperature of the IGBT in C h 00 13 User defined Value corresponds to max operating frequency Pr 01 00 0 9999 0 100 100 Sets the constant pressure control to correspond to the largest...

Страница 141: ...user s master End user s slave Note 02 00 First Master Frequency Command Source 0 Digital keypad UP DOWN keys or Multi function Inputs UP DOWN 1 0 10 V from AVI 2 4 20 mA from ACI 3 RS 485 RJ45 communication 4 Digital keypad potentiometer 0 2 2 Adjusts according to customer s applications 02 01 First Operation Command Source 0 Digital keypad 0 0 0 Adjusts according to customer s applications 1 Ext...

Страница 142: ...al Time D 0 00 1 00 sec 0 00 10 12 PID Deviation Level 0 0 100 0 10 0 5 5 When the pressure feedback is 0 5 kg and time 15 sec follow the settings for Pr 10 20 10 13 PID Deviation Detection Time 0 1 300 0 sec 5 0 15 15 10 18 Feedback of PID Physical Quantity Value 1 0 99 9 99 9 10 10 Sets the maximum feedback of PID physical quantity value to be 10 kg 10 19 PID Calculation Mode Selection 0 Serial ...

Страница 143: ... that when the AC motor drive does not run and is in a constant pressure status the variation of the feedback value is less than 0 12 kg 3 kg X 4 0 12 kg within 2 seconds When the feedback value continues to decrease to make the deviation of the set point be less than 0 99 kg 3 kg X 33 0 99 kg that is when the feedback value is less than 2 01 kg the AC motor drive starts to run Liquid Usage after ...

Страница 144: ...e pump when an error occurs in the running pump 0 All pumps stop 1 Switch to an alternative pump Bit1 Determines the erroneous pump to be in a standby or stop status after reset 0 Standby after reset 1 Stop after reset Bit2 Determines whether the master pump receives the RUN command or not when an error occurs in the running pump 0 Does not receives the RUN command 1 Choose to run with an alternat...

Страница 145: ...the user defined unit U 0 8 8 1 Display the counter value c 2 Display the status of multi function input terminals d 3 Display the DC bus voltage u 4 Display the output voltage E 5 Display the PID analog feedback signal value in b 6 Display the output power factor angle n 7 Display the output power P 8 Display the setting values for PID control and feedback signal 9 Display the AVI I V 10 Display ...

Страница 146: ...reaches the setting value Parameter Function Settings Default End user s master End user s slave Note 02 00 First Master Frequency Command Source 0 Digital keypad UP DOWN keys or Multi function Inputs UP DOWN 1 0 10 V from AVI 2 4 20 mA from ACI 3 RS 485 RJ45 communication 4 Digital keypad potentiometer 0 2 2 Adjusts according to customer s applications 02 01 First Operation Command Source 0 Digit...

Страница 147: ...etection Time 0 1 300 0 sec 5 0 15 15 10 18 Feedback of PID Physical Quantity Value 1 0 99 9 99 9 10 10 Sets the maximum feedback of PID physical quantity value to be 10 kg 10 19 PID Calculation Mode Selection 0 Serial mode 1 Parallel mode 0 1 1 The parallel PID calculation mode applies for the constant pressure water supply control 10 20 Erroneous PID Feedback Deviation Level Action 0 Wan and kee...

Страница 148: ...han 0 99 kg 3 kg X 33 0 99 kg that is when the feedback value is less than 2 01 kg the AC motor drive starts to run Liquid Usage after Liquid Leakage Assume that when the AC motor drive does not run and is in a constant pressure status the variation of the feedback value is higher than 0 12 kg 3 kg X 4 0 12 kg within 2 seconds the AC motor drive starts to run 10 25 Liquid Leakage Change Detection ...

Страница 149: ...op status after reset 0 Standby after reset 1 Stop after reset Bit2 Determines whether the master pump receives the RUN command or not when an error occurs in the running pump 0 Does not receives the RUN command 1 Choose to run with an alternative pump 1 1 1 000 0 001 1 010 2 011 3 100 4 101 5 110 6 111 7 10 44 Selection of Pump s Start up Sequence 0 By pump ID 1 By running time 0 1 1 Adjusts acco...

Страница 150: ...Chapter 4 Parameters VFD EL W 4 108 This page intentionally left blank ...

Страница 151: ...1 5 5 Overload oL 5 6 Keypad Display is Abnormal 5 7 Phase Loss PHL 5 8 Motor Does Not Run 5 9 Motor Speed Cannot be Changed 5 10 Motor Stalls During Acceleration 5 11 The Motor Does Not Run as Expected 5 12 Electromagnetic Induction Noise 5 13 Operating Environment Condition 5 14 Affecting Other Machines ...

Страница 152: ...Chapter 5 Troubleshooting VFD EL W 5 2 5 1 Over Current oc ...

Страница 153: ...Chapter 5 Troubleshooting VFD EL W 5 3 5 2 Over Voltage ov ...

Страница 154: ...Chapter 5 Troubleshooting VFD EL W 5 4 5 3 Low Voltage Lv ...

Страница 155: ...Chapter 5 Troubleshooting VFD EL W 5 5 5 4 Overheat oH1 ...

Страница 156: ...Chapter 5 Troubleshooting VFD EL W 5 6 5 5 Overload oL ...

Страница 157: ...Chapter 5 Troubleshooting VFD EL W 5 7 5 6 Keypad Display is Abnormal 5 7 Phase Loss PHL ...

Страница 158: ...Chapter 5 Troubleshooting VFD EL W 5 8 5 8 Motor Does Not Run ...

Страница 159: ...Chapter 5 Troubleshooting VFD EL W 5 9 5 9 Motor Speed Cannot be Changed ...

Страница 160: ...Chapter 5 Troubleshooting VFD EL W 5 10 5 10 Motor Stalls During Acceleration 5 11 The Motor Does Not Run as Expected ...

Страница 161: ...t and no receive enhance immunity 5 13 Operating Environment Condition Since the AC motor drive is an electronic device you must deal with the operating environment conditions Here are some remedial measures to use if necessary 1 To prevent vibration anti vibration dampers are the last choice Vibration must be within the specification Vibration causes mechanical stress and it should not occur freq...

Страница 162: ...acitors never on the AC motor drive output use serial reactors to prevent damage to the capacitors from high harmonics serial reactor phase lead capacitor Motor Temperature Rises When the motor is a standard induction motor with a fan the cooling will be insufficient at low speed causing the motor to overheat In addition high harmonics at the output increases copper and core losses Use the followi...

Страница 163: ...Chapter 5 Troubleshooting VFD EL W 5 13 This page intentionally left blank ...

Страница 164: ...tify defective and worn out parts and eliminate the causes of malfunctions in the AC motor drive at an early stage At the same time parts that have exceeded their product life should be replaced whenever possible to ensure safe operation Visual checks should be done regularly to monitor the AC motor drive s operation and to make sure nothing unusual happens Check the situations listed in the follo...

Страница 165: ...is in the specified temperature range 2 Make sure that the ventilation holes are not obstructed 3 Provide enough spacing for adequate ventilation see Chapter 1 Low voltage The AC motor drive detects that the DC bus voltage has fallen below its minimum value 1 Check whether the input voltage is in the AC motor drive rated input voltage range 2 Check for abnormal load on the motor 3 Check for correc...

Страница 166: ...city model External Fault 1 When multi function input terminals MI1 MI4 are set to external fault the AC motor drive stops output 2 When changing the communication address 2002H bit0 1 the drive stops output The EF disappears once the signal source is cleared and reset Internal EEPROM cannot be programmed Return the unit to the factory Internal EEPROM cannot be programmed Return the unit to the fa...

Страница 167: ... for detailed information PID feedback signal fault 1 Check the parameter settings Pr 10 01 and AVI ACI wiring 2 Check for possible fault between the system response time and the PID feedback signal detection time Pr 10 08 Software protection failure Password locked Analog signal error Check if the wiring for ACI is broken Unusual PID feedback Check if wiring for PID feedback is correct and the pa...

Страница 168: ...e external terminal after the fault is cleared and set this terminal to be ON or send the Reset command through communication then the trip is cleared Make sure the RUN command or signal is OFF before executing RESET to prevent damage to the drive or personal injury due to immediate operation after reset Digital Keypad for EL W ...

Страница 169: ... any dangerous objects in the environment Visual inspection Voltage Items to Check Methods and Criterion Maintenance Period Daily Half Year One Year Check if the voltages of the main circuit and control circuit are correct Measure with multi meter with standard specifications Digital keypad display Items to Check Methods and Criterion Maintenance Period Daily Half Year One Year Check that the disp...

Страница 170: ...od Daily Half Year One Year Check for wiring color change or deformation due to overheating Visual inspection Check for wiring insulation damage or color change Visual inspection Main circuit terminal block Items to Check Methods and Criterion Maintenance Period Daily Half Year One Year Check for any damage Visual inspection Main circuit filter capacity Items to Check Methods and Criterion Mainten...

Страница 171: ...f Year One Year Check for any vibration sounds Auditory inspection Check that the contact works correctly Visual inspection Main circuit printed circuit board and connector Items to Check Methods and Criterion Maintenance Period Daily Half Year One Year Check for any loose screws and connectors Tighten the screws Check for any peculiar odors or color changes Visual inspection and smell Check for a...

Страница 172: ...ilation channel Items to Check Methods and Criterion Maintenance Period Daily Half Year One Year Check for any obstruction around the heat sink air intake or air outlet Visual inspection NOTE Use chemically neutral cloth to clean and use a dust cleaner to remove dust when necessary ...

Страница 173: ...Chapter 6 Fault Code Information and Maintenance VFD EL W 6 10 This page intentionally left blank ...

Страница 174: ...rating Curve of Ambient Temperature NOTE 1 VFD EL W has two types of packaging Individual Package suffixed with 1 at the end of the model name and 12 pcs carton 2 The electrical specifications are the same for either packaging 3 The VFD EL W Series include the 230V and 460V models The 230V model is one phase the 460V model is three phase Refer to following specifications for details ...

Страница 175: ...e 10 180 264 V Frequency Tolerance 5 47 63 Hz Cooling Method Convective Cooling Fan Cooling Weight kg 1 0 1 0 1 0 1 4 1 4 A2 460V 3φ Series Model Number VFD EL43W 1 004 007 015 022 040 Max Applicable Motor Output kW 0 4 0 75 1 5 2 2 4 0 Max Applicable Motor Output HP 0 5 1 0 2 0 3 0 5 5 Output Rating Rated Output Capacity kVA 1 2 2 0 3 3 4 4 7 4 Rated Output Current A 1 5 2 5 4 2 5 5 9 0 Maximum O...

Страница 176: ...n RS 485 serial interface Modbus Multi function Input Signal Multi step selection 0 7 Jog accel decel inhibit two accel decel switches counter external Base Block ACI AVI selections drive reset UP DOWN key settings NPN PNP input selection Multi function Output Indication AC drive operating frequency reached zero speed Base Block fault indication overheat alarm emergency stop and status selections ...

Страница 177: ...es liquid and dust Ambient Temperature Non condensing non freezing 10 50 C 40 C for side by side mounting except VFD007EL21W 1 which requires the installation of a cooling fan Running at full load may reduce the lifespan of the drive Storage Transportation Temperature 20 60 C Ambient Humidity Below 90 RH non condensing Vibration 1 0 mm peak to peak 2 13 2 Hz 0 7 1 0 G 13 2 55 Hz 1 0 G 55 512 Hz co...

Страница 178: ...1 VFD022EL21W 1 VFD004EL43W 1 VFD007EL43W 1 VFD015EL43W 1 VFD022EL43W 1 VFD040EL43W 1 Carrier Frequency Derating Curve Model Carrier Frequency Limitation VFD007EL21W 1 If the AC motor drive is installed at an ambient temperature of 40 C and operates at the rated current the carrier frequency needs to be within 8 kHz If the carrier frequency is higher than 8 kHz decrease 5 of the rated current for ...

Страница 179: ...Appendix A Specifications VFD EL W A 6 This page intentionally left blank ...

Страница 180: ...ommended non fuse breaker A VFD002EL21W 10 VFD004EL43W 5 VFD004EL21W 15 VFD007EL43W 5 VFD007EL21W 20 VFD015EL43W 10 VFD015EL21W 30 VFD022EL43W 15 VFD022EL21W 50 VFD040EL43W 20 Fuse Specification Chart Fuse specifications lower than the table below are allowed Model I A Input I A Output Line Fuse I A Bussmann P N VFD002EL21W 4 9 1 6 10 JJN 10 VFD004EL21W 6 5 2 5 15 JJN 15 VFD004EL43W 1 8 1 5 5 JJS ...

Страница 181: ... Inductance mH 3 Impedance 5 Impedance 0 4 0 5 2 3 20 32 0 75 1 4 6 9 12 1 5 2 4 6 6 5 9 2 2 3 8 12 5 7 5 4 0 5 5 8 12 3 5 AC Output Reactor Recommended Value 230V 50 60Hz Three Phase kW HP Fundamental Amps Max continuous Amps Inductance mH 3 Impedance 5 Impedance 0 2 0 25 4 6 9 12 0 4 0 5 4 6 6 5 9 0 75 1 8 12 3 5 1 5 2 8 12 1 5 3 2 2 3 12 18 1 25 2 5 460V 50 60Hz Three Phase kW HP Fundamental Am...

Страница 182: ...tor drive motor motor motor Application 2 A silicon rectifier and AC motor drive are connected to the same power Issues Switching spikes are generated when the silicon rectifier switches ON OFF These spikes may damage the mains circuit Correct wiring DC power reactor reactor AC motor drive motor Silicon Controlled Rectifier Application 3 The power supply capacity is 10 or above times the AC motor ...

Страница 183: ...ram B NOTE 600V Insulated Unshielded Cable 1 The table above gives approximate wire size for zero phase reactors but the selection is ultimately governed by the type and diameter of the cable that is the cable must fit through the center hole of zero phase reactors 2 When wiring do not pass the grounding cable through the zero phase reactor only pass the motor wire or power cable through the zero ...

Страница 184: ...t of the drive Read parameters Press PROG DATA for 2 3 sec until it is flashing Then you can read four parameters from the AC motor drive to the digital keypad PU06 read D0 read D3 Press UP or DOWN key to change to SAVE function Write parameters Press PROG DATA for 2 3 sec until it is flashing Then you can write the parameters from the digital keypad PU06 to the AC motor drive Press UP or DOWN key...

Страница 185: ...ely one second if the entered input data has been accepted After a parameter value has been set the new value is automatically stored in memory Err displays if the input is invalid or the input exceeds the setting range Communication Error Refer to Parameter Group 09 in Chapter 04 for details ...

Страница 186: ...Appendix B Accessories VFD EL W B 7 B 3 1 3 Operation Flow Chart Write parameters failure Write parameters success ...

Страница 187: ...snap fit or by fastening screws PU08V By fastening screws Protection Marking Front panel IP20 Rear Panel IP00 Network Interface RJ45 RJ Registered Jack Maximum cable length 5 meters Main Function RS 485 communication Read Write parameters Display status Send commands Display startup meu VFD PU08V NOTE The VFD PU08 and VFD PU08V don t not include the extension cord Please choose the suitable extens...

Страница 188: ...W B 9 Communication cable No Model Name L mm inch 1 UC CMC003 01A 300 11 8 2 UC CMC005 01A 500 19 6 3 UC CMC010 01A 1000 39 0 4 UC CMC015 01A 1500 59 0 5 UC CMC020 01A 2000 78 7 6 UC CMC030 01A 3000 118 1 7 UC CMC050 01A 5000 196 8 ...

Страница 189: ...ther external accessory to avoid overload on terminal 24V which will damage the motor drive Use only terminals MI after your install the cooling fan Cooling Fan Model Applicable Motor Drive Product Appearance MKEL AFKM1 VFD007EL21W 1 Note the power cable of the cooling fan is about 150mm Cooling Fan Installation 1 Follow the direction of the arrow to remove the top cover 2 As shown in the image on...

Страница 190: ...Appendix B Accessories VFD EL W B 11 3 Replace the top cover to complete the cooling fan installation ...

Страница 191: ...eed power and the change in load capacity The following table lists the factors you need to consider depending on your requirements Item Related Specification Speed and torque characteristics Time ratings Overload capacity Starting torque Load type Friction load and weight load Liquid viscous load Inertia load Load with power transmission Load speed and torque characteristics Constant torque Const...

Страница 192: ... equals 2 2 The current should be less than the rated current of the AC motor drive A Acceleration time 60 seconds _ _ _ _ _ _ 5 1 1 1 A drive motor AC of current rated the k n n I n S M T S T Acceleration time 60 seconds _ _ _ _ _ _ 1 1 A drive motor AC of current rated the k n n I n S M T S T 2 3 When running continuously The load capacity requirement should be less than the capacity of the AC m...

Страница 193: ... V M I Motor rated current A for commercial power k Correction factor calculated from the current distortion factor 1 05 1 1 depending on PWM method 1 C P Continuous motor capacity kVA S k Starting current rated current of the motor T n Number of motors in parallel S n Number of simultaneously started motors 2 GD Total inertia GD2 calculated back to motor shaft kg m2 L T Load torque A t Motor acce...

Страница 194: ...ease the capacities of both the motor and the AC motor drive When a fault occurs on the drive a protective circuit is activated and the AC motor drive output is turned off The motor coasts to stop For an emergency stop use an external mechanical brake to quickly stop the motor Setting Parameters You can set the AC motor drive to an output frequency up to 400 Hz less for some models with the digita...

Страница 195: ...o the following motor vibration problems Resonant mechanical vibration use anti vibration dampers to mount equipment that runs at varying speed Motor imbalance special care is required for operation at 60 Hz and higher frequencies The motor fan is very noisy when the motor speed exceeds 60 Hz or above Special Motors Pole changing Dahlander motor The rated current differs from that of a standard mo...

Страница 196: ...Power Transmission Mechanism Pay attention to reduced lubrication when operating equipment such as gear reduction motors gearboxes belts and chains over long periods at low speeds At high speeds 60 Hz and above noises and vibrations that reduce the lifetime of the equipment may occur Motor Torque The motor torque characteristics operated by an AC motor drive depend on the motor model selection and...

Страница 197: ...Appendix C How to Select the Right AC Motor Drive VFD EL W C 7 This page intentionally left blank ...

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