Kruger Ecowatt K320 Series User manual

Ecowatt®Drive K320 series Change history
No.
Change description
Version
Release date
1
First release
V1.0
June 2021

Ecowatt®Drive K320 series Preface
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Preface
The Ecowatt Drive K320 series is a high performance variable-frequency drive (VFD) that
specific designed to be applied in Fan application which integrates the latest Safety and
Energy-saving functions for the demand control ventilation system. It can drive both
synchronous motors and asynchronous motors.
[Energy saving]
This VFD adopts dedicated PID control mode for Demand Control Ventilation system to
optimizes the voltage output of the VFD to the actual load of the FAN motor, thus minimizing
its power consumption.
[Easy control]
It supports multiple kinds of popular control signal (0-10V signal, 4-20mA) and Modbus
communication to realize complicated system solutions.
[High performance]
It armed with advanced vector control technology and the latest digital processor dedicated
for motor control, thus enhancing product reliability and adaptability to the environment.
[Reliable]
Ecowatt Drive K320 uses high power density design. Some power ranges carry built-in DC
reactor and Braking unit to save installation space. Through overall EMC design, it can satisfy
the low noise and low electromagnetic interference requirements to cope with challenging
grid, temperature, humidity and dust conditions, thus greatly improving product reliability.
This operation manual presents installation wiring, parameter setup, fault diagnosis and
troubleshooting, and precautions related to daily maintenance.
Read this manual carefully before installation to ensure the VFD is installed and operated in a
proper manner to give full play to its excellent performance and powerful functions.
If the product is ultimately used for military affairs or manufacture of weapon, it will be listed
on the export control formulated by Foreign Trade Law of the People's Republic of China.
Rigorous review and necessary export formalities are needed when exported. Our company
reserves the right to update the information of our products.

Ecowatt®Drive K320 series Contents
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Contents
Preface ........................................................................................................................................................... i
Contents.......................................................................................................................................................... ii
1 Safety precautions......................................................................................................................................1
1.1 What this chapter contains....................................................................................................................1
1.2 Safety definition........................................................................................................................................1
1.3 Warning symbols .....................................................................................................................................1
1.4 Safety guidelines...................................................................................................................................... 2
1.4.1 Delivery and installation............................................................................................................ 2
1.4.2 Commissioning and running................................................................................................... 3
1.4.3 Maintenance and component replacement........................................................................ 4
1.4.4 What to do after scrapping ....................................................................................................... 4
2 Quick startup...............................................................................................................................................5
2.1 What this chapter contains...................................................................................................................5
2.2 Unpacking inspection ............................................................................................................................5
2.3 Checking before applying......................................................................................................................5
2.4 Environment .............................................................................................................................................5
2.5 Installation confirmation ..................................................................................................................... 6
2.6 Basic commissioning............................................................................................................................. 7
3 Product overview .......................................................................................................................................8
3.1 What this chapter contains.................................................................................................................. 8
3.2 Basic principle.......................................................................................................................................... 8
3.3 Product specifications ........................................................................................................................... 9
3.4 Product nameplate.................................................................................................................................12
3.5 Model designation code .......................................................................................................................12
3.6 Product ratings........................................................................................................................................13
3.7 Structure diagram..................................................................................................................................14
4 Installation guidelines ............................................................................................................................15
4.1 What this chapter contains.................................................................................................................15
4.2 Mechanical installation.......................................................................................................................15
4.2.1 Installation environment.........................................................................................................15
4.2.2 Installation direction.................................................................................................................16
4.2.3 Installation mode .......................................................................................................................17
4.2.4 Single-unit installation ............................................................................................................18
4.2.5 Multiple-unit installation........................................................................................................18
4.2.6 Vertical installation...................................................................................................................19
4.2.7 Tilted installation...................................................................................................................... 20
4.3 Main circuit standard wiring.............................................................................................................21
4.3.1 Main circuit wiring diagram...................................................................................................21

Ecowatt®Drive K320 series Contents
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4.3.2 Main circuit terminal diagram ............................................................................................. 22
4.3.3 Wiring procedure of the main circuit terminals.............................................................24
4.4 Control circuit standard wiring........................................................................................................ 25
4.4.1 Basic control circuit wiring diagram .................................................................................. 25
4.4.2 Input/output signal connection diagram .......................................................................... 27
4.5 Wiring protection.................................................................................................................................. 28
4.5.1 Protecting the VFD and input power cable in short circuit.......................................... 28
4.5.2 Protecting the motor and motor cable in short circuit.................................................. 29
4.5.3 Protecting the motor from thermal overload ...................................................................29
4.5.4 Bypass connection.................................................................................................................... 29
5 Basic operation guidelines.................................................................................................................... 30
5.1 What this chapter contains................................................................................................................ 30
5.2 Keypad introduction............................................................................................................................. 30
5.3 Keypad display....................................................................................................................................... 34
5.3.1 Displaying stopped-state parameters..................................................................................34
5.3.2 Displaying running-state parameters................................................................................. 35
5.3.3 Displaying fault information ................................................................................................. 35
5.4 Operating the VFD by keypad............................................................................................................ 36
5.4.1 Enter/exit menu ......................................................................................................................... 36
5.4.2 List edit ..........................................................................................................................................41
5.4.3 Add parameters to the parameter list displayed in stop/running state .................. 42
5.4.4 Add parameter to common parameter setup list............................................................42
5.4.5 Parameter selection edit interface.......................................................................................43
5.4.6 Parameter setup edit interface..............................................................................................44
5.4.7 State monitoring interface .....................................................................................................44
5.4.8 Motor parameter autotuning .................................................................................................45
5.4.9 Parameter backup ..................................................................................................................... 45
5.4.10 System setup.............................................................................................................................46
5.4.11 Power-on guiding settings....................................................................................................46
5.5 Basic operations.....................................................................................................................................49
5.5.1 What this section contains.....................................................................................................49
5.5.2 Common commissioning procedure...................................................................................49
5.5.3 Vector control.............................................................................................................................. 53
5.5.4 Space voltage vector control mode......................................................................................60
5.5.5 Torque control.............................................................................................................................69
5.5.6 Motor parameters ...................................................................................................................... 73
5.5.7 Start/stop control....................................................................................................................... 78
5.5.8 Frequency setting...................................................................................................................... 83
5.5.9 Analog input................................................................................................................................ 88
5.5.10 Analog output............................................................................................................................ 90

Ecowatt®Drive K320 series Contents
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5.5.11 Digital input................................................................................................................................ 94
5.5.12 Digital output........................................................................................................................... 103
5.5.13 Simple PLC ............................................................................................................................... 108
5.5.14 Multi-step speed running.....................................................................................................110
5.5.15 PID control.................................................................................................................................112
5.5.16 Running at wobbling frequency ........................................................................................118
5.5.17 Local encoder input................................................................................................................119
5.5.18 Commissioning procedures for closed-loop control, position control and spindle
positioning........................................................................................................................................... 120
5.5.19 Fault handling......................................................................................................................... 127
6 Function parameter list ........................................................................................................................132
5.5 What this chapter contains.............................................................................................................. 132
5.6 Function parameter list..................................................................................................................... 132
7 Troubleshooting .................................................................................................................................... 249
7.1 What this chapter contains..............................................................................................................249
7.2 Indications of alarms and faults ....................................................................................................249
7.3 Fault reset..............................................................................................................................................249
7.4 Fault history..........................................................................................................................................249
7.5 VFD faults and solutions...................................................................................................................249
7.5.1 Details of faults and solutions..............................................................................................250
7.5.2 Other states................................................................................................................................257
7.6 Analysis on common faults.............................................................................................................258
7.6.1 Motor fails to work ..................................................................................................................258
7.6.2 Motor vibrates ..........................................................................................................................259
7.6.3 Overvoltage................................................................................................................................260
7.6.4 Undervoltage.............................................................................................................................260
7.6.5 Unusual heating of motor..................................................................................................... 261
7.6.6 VFD overheating ......................................................................................................................262
7.6.7 Motor stalls during ACC ........................................................................................................263
7.6.8 Overcurrent................................................................................................................................264
7.7 Countermeasures on common interference...............................................................................265
7.7.1 Interference on meter switches and sensors..................................................................265
7.7.2 Interference on RS485 communication ...........................................................................266
7.7.3 Stop failure and indicator shimmering due to motor cable coupling ....................267
7.7.4 Leakage current and interference on RCD ......................................................................268
7.7.5 Live device chassis .................................................................................................................269
8 Maintenance........................................................................................................................................... 270
8.1 What this chapter contains..............................................................................................................270
8.2 Periodical inspection .........................................................................................................................270
8.3 Cooling fan ............................................................................................................................................273

Ecowatt®Drive K320 series Contents
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8.4 Capacitor................................................................................................................................................274
8.4.1 Capacitor reforming ................................................................................................................274
8.4.2 Electrolytic capacitor replacement....................................................................................275
8.5 Power cable...........................................................................................................................................275
9 Communication ..................................................................................................................................... 276
9.1 What this chapter contains..............................................................................................................276
9.2 Modbus protocol introduction ........................................................................................................276
9.3 Application............................................................................................................................................276
9.3.1 RS485............................................................................................................................................276
9.3.2 RTU ..............................................................................................................................................279
9.4 RTU command code and communication data ........................................................................282
9.4.1 Command code 03H, reading N words (continuously up to 16 words)...................282
9.4.2 Command word 06H, writing a word ...............................................................................284
9.4.3 Command code 08H, diagnosis...........................................................................................285
9.4.4 Command code 10H, continuous writing ........................................................................286
9.4.5 Data address definition..........................................................................................................287
9.4.6 Fieldbus scale ........................................................................................................................... 291
9.4.7 Error message response........................................................................................................292
9.4.8 Read/Write operation example...........................................................................................294
9.5 Common communication faults ....................................................................................................299
Appendix A Expansion cards ................................................................................................................ 300
A.1 Model definition..................................................................................................................................300
A.2 Dimensions and installation ..........................................................................................................306
A.3 Wiring ....................................................................................................................................................309
A.4 IO expansion card——EC-IO501-00 ................................................................................................309
A.5 Programmable expansion card——EC-PC502-00.......................................................................311
A.6 Communication card function description ............................................................................... 314
A.6.1 Bluetooth communication card––EC-TX501 and WIFI communication
card——EC-TX502 .............................................................................................................................. 314
A.6.2 PROFIBUS-DP communication card——EC-TX503........................................................315
A.6.3 Ethernet communication card——EC-TX504................................................................. 317
A.6.4 CANopen communication card——EC-TX505 and CAN master/slave control
communication card EC-TX511..................................................................................................... 317
A.6.5 PROFINET communication card——EC-TX509............................................................. 319
A.7 PG expansion card function description .................................................................................... 321
A.7.1 Sin/Cos PG card——EC-PG502.............................................................................................. 321
A.7.2 UVW incremental PG card——EC-PG503-05...................................................................323
A.7.3 Resolver PG card——EC-PG504-00..................................................................................... 325
A.7.4 Multifunction incremental PG card——EC-PG505-12 ..................................................327
A.7.5 24V multi-function incremental PG card——EC-PG505-24 .......................................330

Ecowatt®Drive K320 series Contents
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A.7.6 Simplified incremental PG card——EC-PG507-12 .........................................................333
Appendix B Technical data.................................................................................................................... 334
B.1 What this chapter contains..............................................................................................................334
B.2 Derated application ............................................................................................................................334
B.2.1 Capacity ......................................................................................................................................334
B.2.2 Derating......................................................................................................................................334
B.3 Grid specifications..............................................................................................................................335
B.4 Motor connection data...................................................................................................................... 335
B.5 Application standards.......................................................................................................................336
B.5.1 CE marking................................................................................................................................336
B.5.2 EMC compliance declaration ..............................................................................................336
B.6 EMC regulations..................................................................................................................................336
B.6.1 VFD category of C2 ..................................................................................................................337
B.6.2 VFD category of C3..................................................................................................................337
Appendix C Dimension drawings......................................................................................................... 338
C.1 What this chapter contains..............................................................................................................338
C.2 Keypad structure.................................................................................................................................338
C.2.1 Structure diagram....................................................................................................................338
C.2.2 Keypad installation bracket ................................................................................................338
C.3 VFD structure .......................................................................................................................................339
C.4 VFD structure.......................................................................................................................................339
C.4.1 Wall-mounting dimensions.................................................................................................339
C.4.2 Flange installation dimensions ......................................................................................... 341
C.4.3 Floor installation dimensions.............................................................................................343
Appendix D Optional peripheral accessories..................................................................................... 344
D.1 What this chapter contains .............................................................................................................344
D.2 Wiring of peripheral accessories...................................................................................................344
D.3 Power supply........................................................................................................................................345
D.4 Cables......................................................................................................................................................346
D.4.1 Power cables .............................................................................................................................346
D.4.2 Control cables...........................................................................................................................347
D.4.3 Recommended cable sizes ...................................................................................................348
D.4.4 Cable arrangement.................................................................................................................349
D.4.5 Insulation inspection.............................................................................................................349
D.5 Breaker and electromagnetic contactor......................................................................................349
D.6 Reactors ..................................................................................................................................................351
D.7 Filters......................................................................................................................................................352
D.7.1 Filter model description ........................................................................................................353
D.7.2 Filter model selection............................................................................................................354
D.8 Braking system ...................................................................................................................................355

Ecowatt®Drive K320 series Contents
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D.8.1 Brake component selection.................................................................................................. 355
D.8.2 Braking resistor cable selection.........................................................................................357
D.8.3 Braking resistor installation ...............................................................................................357
Appendix E STO function description................................................................................................. 359
E.1 STO function logic...............................................................................................................................359
E.2 STO channel delay description ......................................................................................................360
STO function installation checklist.....................................................................................................360
Appendix F Further information ...........................................................................................................361
F.1 Product and service queries............................................................................................................. 361
F.2 Feedback on Kruger VFD manuals ............................................................................................... 361
F.3 Documents on the Internet.............................................................................................................. 361

Ecowatt®Drive K320 series Safety precautions
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1Safety precautions
1.1 What this chapter contains
Read this manual carefully and follow all safety precautions before moving, installing,
operating and servicing the VFD. If these safety precautions are ignored, physical injury or
death may occur, or damage may occur to the equipment.
If any physical injury or death or damage to the equipment occur due to neglect of the safety
precautions in the manual, our company will not be responsible for any damages and we are
not legally bound in any manner.
1.2 Safety definition
Danger: Severe personal injury or even death can result if related requirements are not
followed.
Warning: Personal injury or equipment damage can result if related requirements are not
followed.
Note: Actions taken to ensure proper running.
Trained and qualified professionals: People working on the VFD must have received
professional electrical and safety training and obtained the certificates, and must be familiar
with all steps and requirements of VFD installing, commissioning, running and maintaining
and capable to prevent any emergencies.
1.3 Warning symbols
Warnings caution you about conditions which can result in serious injury or death and/or
damage to the equipment, and advice on how to avoid the danger. Following warning symbols
are used in this manual.
Symbols
Name
Instruction
Abbreviation
Danger
Danger
Serious physical injury or even death
may occur if related requirements are not
followed
Warning
Warning
Physical injury or damage to the
equipment may occur if related
requirements are not followed
Forbid
Electrostatic
discharge
The PCBA may be damaged if related
requirements are not followed
Hot
Hot sides
The VFD base may become hot. Do not
touch.
Electric
shock
As high voltage still presents in the bus
capacitor after power off, wait for at least
five minutes (or 15 min / 25 min,
depending on the warning symbols on
the machine) after power off to prevent
electric shock