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CHINT NVF2G Series User Manual

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NO:2024.05
NVF2G Series
Inverter
User's Guide
Standard: EC 61800-3

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Summary of Contents for CHINT NVF2G Series

  • Page 1 NO:2024.05 NVF2G Series Inverter User's Guide Standard: EC 61800-3...
  • Page 2 (400 customer service hotline: 400-817-7777) 　　 The company reserves the right to continuously optimize and improve the NVF2G series inverters, and the information is subject to change without prior notice.

  • Page 3: Safety Alert

    Safety Alert The product is strictly prohibited to be installed in an environment containing flammable and explosive gas, moisture condensation, and it is strictly prohibited to operate the product with wet hands. When the product is working, it is strictly forbidden to touch the conductive part of the product. When installing, maintaining and maintaining the product, it is necessary to ensure that the line is powered off.
  • Page 4 Safety Alert It is forbidden for non-professional technicians to test the signal during operation , otherwise there is a risk of injury or equipment damage. It is not allowed to control the start and stop of the inverter by frequently turning on and off the power, otherwise there is a risk of damage to the equipment.

  • Page 5: Table Of Contents

    Contents Main purpose and scope of application 　　 1.1 Unpacking inspection 　 　1.2 Main purpose 　　 1.3 Scope of application 　　 1.4 Series model specifications and their meanings 　　 1.5 Product specifications and models Normal use, installation and transportation, storage conditions 　...
  • Page 6 Contents Installation and Wiring 　 　6.1 Precautions for installation 　 　6.2 Precautions for use 　 　6.3 EMC Precautions in Wiring 　 　6.4 Power on for the first time Operation and debugging 　　 7.1 Operation panel introduction 　 　7.2 Example of panel operation 　...
  • Page 7 Contents 　 　8.12 Instantaneous power failure continuous operation function (instantaneous power failure non-stop function) 　 　8.13 Jogging operation 　　 8.14 Jump frequency 　 　8.15 Forward and reverse switching 　　 8.16 Dynamic braking 　　 8.17 Frequency detection output (FDT) 　　 8.18 Zero Current Detection 　...
  • Page 8 Contents 　　 9.10 Example of Modbus communication Maintenance and troubleshooting 　 　10.1 Contents of this chapter 　 　10.2 Inspection items 　　 10.3 Routine care and maintenance 　　 10.4 Regular maintenance 　　 10.5 Replacement of Vulnerable Parts of the Frequency Converter 　　...

  • Page 9: Main Purpose And Scope Of Application

    NVF2G Series Inverter User's Guide Main purpose and scope of application 1.1 Unpacking inspection 　　 After receiving the product, the following checks are required. If there is any discrepancy, please contact the local dealer: 　　 1. Whether the packing box is complete, whether it is damaged or damp, etc.;...

  • Page 10: Product Specifications And Models

    NVF2G Series Inverter User's Guide Code VOLTAGE LEVEL name Company Code INVERTER Code INPUT VOLTAGE name DESIGN CODE SINGLE PHASE THREE PHASE IMPROVED TYPE Code TYPE name CONSTANT TORQUE MATCHED MOTOR POWER FAN PUMP Figure 1.2 Nameplate description and model naming rules 1.5 Product specifications and models...

  • Page 11: Normal Use, Installation And Transportation, Storage Conditions

    NVF2G Series Inverter User's Guide Normal use, installation and transportation, storage conditions 2.1 Conditions of use, transportation and storage 　　 1. Use the ambient temperature (-10~＋45)°C, derate use between 45°C~55°C, derate use by 1% for every 1°C increase in temperature;...
  • Page 12 NVF2G Series Inverter User's Guide 　 　For multiple installations, vertical installation and inclined installation can be used. 　 　When multiple inverters are installed vertically, windshields must be added, otherwise multiple inverters will affect each other and cause poor heat dissipation.
  • Page 13 NVF2G Series Inverter User's Guide 　　When multiple frequency converters are installed obliquely, it must be ensured that the air duct on the air inlet side of the inverter is separated from the air duct on the air outlet side to avoid mutual influence , as shown in Figure 2.3:...

  • Page 14: Main Technical Parameters And Performance

    NVF2G Series Inverter User's Guide Main technical parameters and performance 3.1 Technical parameters and performance Table 3.1 General technical specification parameters and performance Project Project description Rated voltage Three-phase: 380~440 V: 380V(-15 %) ~ 440V(+15%) frequency 50Hz / 60Hz enter...

  • Page 15: Structural Features And Working Principle

    NVF2G Series Inverter User's Guide Structural features and working principle 4.1 Product structure feature map INSTALL HOLE Panel (Top) SHELL Keyboard NAMEPLATE Panel(Bottom) BASEPLATE Figure 4.1 NVF2G-1.5/PS4~NVF2G-11/PS4 external parts diagram INSTALL HOLE Panel SHELL Panel base Keyboard NAMEPLATE Figure 4.2 NVF2G-11/TS4~NVF2G-30/PS4 extermal parts diagram...
  • Page 16 NVF2G Series Inverter User's Guide INSTALL HOLE Panel SHELL Panel base Keyboard NAMEPLATE Figure 4.3 NVF2G-30/TS4~NVF2G-75/PS4 external parts diagram RINGS INSTALL HOLE Panel Panel base Keyboard SHELL NAMEPLATE Figure 4.4 NVF2G-75/TS4~NVF2G-315/PS4 Outline Components...

  • Page 17: Main Circuit Terminal Description

    NVF2G Series Inverter User's Guide INSTALL HOLE RINGS Panel (Top) Panel base Keyboard SHELL Panel(Bottom) NAMEPLATE Figure 4.5 NVF2G-315/TS4 ~NVF2G-400/TS4 external parts diagram 4.2 Main circuit terminal description 　 　(1) Three-phase (380 ~ 440 ) V series (NVF2G -1.5/PS4 ~ 30/PS4 ) Figure 4.6 Main circuit terminal NVF2G-1.5/PS4 ~ 30/PS4...
  • Page 18 NVF2G Series Inverter User's Guide 　　 ( 3) Three-phase (380 ~ 440 ) V series (NVF2G-45/TS4 ~ 110/PS4 ) DC CHOKE 3PHASE OUTPUT 3PHASE INPUT GROUND DC BUS/BREAKER UNIT Figure 4.8 Main circuit terminal NVF2G-45/TS4 ~110/PS4 　　 (4) Three-phase (380 ~ 440 ) V series NVF2G-110/TS4 ~ 160/PS4...
  • Page 19 NVF2G Series Inverter User's Guide BUS AND BRAKE UNIT 3PHASE AC OUTPUT TERMINAL 3PHASE LOAD OUTPUT GROUND Figure 4.11 Main circuit terminal NVF2G-315/TS4~400/TS4 Note : DC bus positive and negative terminals ; if braking is required, external braking resistors are connected between .

  • Page 20: Description Of Control Circuit Terminals

    NVF2G Series Inverter User's Guide Table 4.2 Main circuit terminal wiring and installation torque R, S , T , , U, V, W Inverter model Tightening torque (N·m) Wire specification (mm ) Terminal screw NVF2G-1.5/P(T)S4 1.2～1.5 NVF2G-2.2/P(T)S4 1.2～1.5 NVF2G-3.7/P(T)S4 1.2～1.5 NVF2G-5.5/P(T)S4...
  • Page 21 NVF2G Series Inverter User's Guide Braking Unit DC Reactor External braking Resistor A Short Jumper Input Motor Earth Inverter Earth Multi-functional 1 Multi-functional Multi-functional 2 Analog 0utput 1 (0-10) V or (0/4-20) mA Multi-functional 3 Multi-functional Multi-functional 4 Analog 0utput 2...
  • Page 22 NVF2G Series Inverter User's Guide Jumper Shorting location Function Illustrate terminal and definition 1-2 : V J601 V voltage type analog input range : ( -10~ + 10 ) V; 2-3 : I I Current analog input range : ( 0~20) mA or (4~20) mA...

  • Page 23: Instructions For Use Of Control Terminals

    NVF2G Series Inverter User's Guide Table 4.4 Function description of control board terminals Terminal mark Terminal name Illustrate RA and RB are normally open contact groups, RB and RC are normally R1A , R1B , R1C , closed contact groups, the function of R1 is set by parameter F6.02 ,...
  • Page 24 NVF2G Series Inverter User's Guide +24V J606 Signal Outside Controller Figure 4.15 PNP type wiring diagram 　 　2) Sink wiring needs to short-circuit 2 - 3 of J606 . The specific wiring diagram is shown below. Signal Outside Controller Figure 4.16 NPN type wiring diagram 4.4.2 Multi-function output terminal...
  • Page 25 NVF2G Series Inverter User's Guide 　　 (2) The multi-function output terminal Y1 can also use an external power supply, and the wiring method is shown in Figure 4.18. Relay Figure 4.18 Multi-function output terminal wiring mode 2 4.4.3 Relay output terminals R1A, R1B, R1C, R2A, R2B, R2C 　...

  • Page 26: Product Shape And Installation Size

    NVF2G Series Inverter User's Guide Product shape and installation size 5.1 Outline, installation size and weight Figure 5.1 NVF2G-1.5/PS4~NVF2G-11/PS4 outline and installation dimensions Figure 5.2 NVF2G-11/TS4~NVF2G-30/PS4 outline and installation dimensions Figure 5.3 NVF2G-30/TS4~NVF2G-75/PS4 outline and installation dimensions...
  • Page 27 NVF2G Series Inverter User's Guide Figure 5.4 NVF2G-75/TS4~NVF2G-315/PS4 outline and installation dimensions Figure 5.5 NVF2G-315/TS4 ~NVF2G-400/TS4 outline and installation dimensions Table 5.1 Product appearance and installation dimensions and weight Weight (Kg) Product specification Remark NVF2G-1.5/PS4 NVF2G-1.5/TS4 (2.2/PS4) See picture 5.1 NVF2G-2.2/TS4 (3.7 /PS4)

  • Page 28: Product Specification

    NVF2G Series Inverter User's Guide Product specification Weight (Kg) Remark NVF2G-45/TS4 (55/PS4) See picture 5.3 197.5 34.4 NVF2G-55/TS4 (75/PS4) NVF2G-75/TS4 (90/PS4) See picture 5.4 NVF2G-90/TS4 (110/PS4) NVF2G-110/TS4 (132/PS4) See picture 5.4 226.5 NVF2G-132/TS4 (160/PS4) NVF2G-160/TS4 (185/PS4) NVF2G-185/TS4 (200/PS4) See picture 5.4...

  • Page 29: Installation And Wiring

    NVF2G Series Inverter User's Guide Installation and Wiring 6.1 Precautions for installation 　 　After the inverter is installed, please pay attention to check the installation of the inverter: Step 1: Input power cables and motor cables to see if the ampacity selection meets the actual load requirements.

  • Page 30: Precautions For Use

    NVF2G Series Inverter User's Guide Precautions Illustrate Before the motor is used for the first time or after being placed for a long time, the insulation of the motor should be checked to prevent the inverter from being damaged due to the insulation failure of the motor winding. Wiring as shown in the figure, please use a 500V voltage type megohmmeter when testing, and ensure that the measured insulation resistance is not less than 5MΩ...

  • Page 31: Emc Precautions In Wiring

    NVF2G Series Inverter User's Guide 6.3 EMC Precautions in Wiring 　 　EMC stands for Electromagnetic Compatibility, which refers to the ability of a device or system to work normally in its electromagnetic environment without constituting anything in the environment that cannot withstand electromagnetic disturbance.

  • Page 32: Power On For The First Time

    NVF2G Series Inverter User's Guide leakage current and their manifestation methods are as follows: 　　 (1) Leakage current to the ground: refers to the leakage current flowing through the common ground wire, which not only flows into the inverter system but also may flow into other equipment through the ground wire.

  • Page 33: Operation And Debugging

    NVF2G Series Inverter User's Guide Operation and debugging 7.1 Operation panel introduction 7.1.1 Schematic diagram of the operation panel Navigation Key Multi-function Key Shift Key Programming Key Ok Key Run Key Stop/Reset Key Increment Key Down Key Figure 7.1 Schematic diagram of LED operation panel 　...
  • Page 34 NVF2G Series Inverter User's Guide Table 7.2 Operation panel function table Name Button Function Key Lock Key Key lock operation can be performed according to the function of F7.01 Key Unlock Key unlock operation possible Panel Self-test Key Perform panel self-test operation 7.1.3 Description of LED digital tube and indicator light...

  • Page 35: Example Of Panel Operation

    NVF2G Series Inverter User's Guide Table 7.4 Description of Status Indicators Indicator light Display state Indicates the current status of the drive Bright Operating status Running status indicator ( RUN/PRG) downtime Bright run in default direction Running direction indicator (F/R)
  • Page 36 NVF2G Series Inverter User's Guide 1st level menu Modify index number Standby status 2nd level menu Group F0 50.00Hz flash Fd.00 Press PRG Press SET Press Press Press PRG Press Press Press Press SET Press SHIFT Press Press PRG Detailed...
  • Page 37 NVF2G Series Inverter User's Guide No confirm for 2 seconds without Enter the modify Press for serial operation, and back to standby mode by status of non-modification modification Long press Press Long press Standby status: Standby status 50.00Hz flash 50.00Hz flash...
  • Page 38 NVF2G Series Inverter User's Guide Display 0000 when Set password Enter to parameter there is no password as 1001 index F7.01 Press Press Press Press SHIFT Press Press PRG Press PRG After 2s Back to main page Password successfully Press PRG...
  • Page 39 NVF2G Series Inverter User's Guide Table 7.6 Binary setting and hexadecimal conversion comparison table Binary settings Hexadecimal (LED bit display value) BIT3 BIT2 BIT1 BIT0 　 　The LED digit refers to the thousands digit, hundreds digit, tens digit or ones digit displayed by the LED on the operation panel.

  • Page 40: Common Parameters

    NVF2G Series Inverter User's Guide Operation parameter display: Operation Enter the Standby status Operation parameter display: output frequency, set frequency, frequency: parameter group PressRUN, output frequency, set frequency 50.00Hz flash bus voltage and output current 50.00Hz F7.05 Operating for a...
  • Page 41 NVF2G Series Inverter User's Guide Function Default Name Detailed description of parameters Attributes code value 0: invalid operation 1: Clear fault record information 2: Restore factory parameters ( except motor parameters ) 3: Restore factory defaults for custom parameters ( except...
  • Page 42 NVF2G Series Inverter User's Guide Confirming the main Circuit wiring correct Refer to installation and wiring operation from chapter Power up after conformation Screen display normal, default is 50.00Hz Selecting control model by F0.00 Comparing to the motor name plate to set the rotor paremeter Setting motor parameter correctly of F2.01~F2.06 from F2...

  • Page 43: Detailed Explanation Of Basic Function Parameters

    NVF2G Series Inverter User's Guide Detailed Explanation of Basic Function Parameters 8.1 Running command setting 　 　The running command is used to control the start, stop, forward rotation, reverse rotation and jogging operation of the inverter. 　　 There are 3 modes of running command: panel, terminal and communication, and the parameter F0.01 can be set to select the running command.
  • Page 44 NVF2G Series Inverter User's Guide 　　 When K1 is closed, K2 is disconnected, the inverter runs forward, and K2 is closed, the inverter rotates reversely; when K1 is disconnected, the inverter stops running. STATUS STOP STOP FOREWARD BACKWARD Figure 8-1-2 Two-wire control mode 2 　　...

  • Page 45: Frequency Command Setting

    NVF2G Series Inverter User's Guide STATUS FOREWARD BACKWARD Figure 8-1-4 Three-wire control mode 2 　　 The function code is set as follows: Name Parameter Description Function code Set value F0.01 run command channel selection terminal control F5.09 Terminal control mode selection Three-wire control mode 2 Forward (acts as "run enable")
  • Page 46 NVF2G Series Inverter User's Guide to correct the frequency, and the frequency is corrected after the inverter stops. The value is cleared to zero. 　　 ● The tens place of F0.13 is 0 (the stop frequency is maintained), set the digital frequency of F0.05 with the panel, and then correct the frequency through the up and down keys of the keyboard or terminals UP and DOWN, and the frequency correction value after the inverter stops is reserved.
  • Page 47 NVF2G Series Inverter User's Guide Function Default Name Parameter Description Predetermined area code value A 2 curve minimum given ( -100.0 ~ +100.0 )% F5.32 0.0% corresponding setting 100.0 % is the percentage AI2 curve maximum setting relative to the maximum F5.33...
  • Page 48 NVF2G Series Inverter User's Guide 　 　multi- stage instruction is relative value, which is the percentage of relative maximum frequency F0.07. The positive or negative of the parameter determines the running direction, if it is negative, it means the inverter runs in the opposite direction.

  • Page 49: Function Code

    NVF2G Series Inverter User's Guide Name Parameter Description Function code Default value Predetermined area Phase 1 Setup FA.01 0x0000 0x0000 ~ 0x0315 FA.02 Phase 1 run time 0.0～6500.0 FA.03 Phase 2 Setup 0x0000 Same as FA.01 FA.04 Phase 2 run time 0.0～6500.0...
  • Page 50 NVF2G Series Inverter User's Guide Figure 8-2-3 Simple PLC stop mode after single cycle 　　 ● Hold final value after single loop: Figure 8-2-4 Simple PLC keeps the final value after a single cycle 　　 ● Continuous loop: FIRST CYCELE...
  • Page 51 NVF2G Series Inverter User's Guide 8.2.6 Closed loop PID setting main frequency 　　 Closed loop PID control is a common method of process control. By performing proportional, integral and differential operations on the difference between the feedback signal of the controlled quantity and the target signal, the output frequency of the inverter is adjusted to form a closed-loop system to stabilize the controlled quantity.
  • Page 52 NVF2G Series Inverter User's Guide Function Default Name Parameter Description Predetermined area code value output filter time 0.00s (0.00~60.00)s F9.09 (0.0~100.0)% F9.10 deviation limit 0.0% differential clipping (0.0~100.0)% F9.11 0.10% Maximum positive deviation (0.0~100.0)% F9.12 1.00% between two outputs Maximum reverse deviation (0.0~100.0)%...

  • Page 53: Start And Stop Method Setting

    NVF2G Series Inverter User's Guide 8.2.7 Communication setting main frequency 　　 See Chapter 9 RS485- Modbus communication instructions for details . 8.2.8 Input setting of auxiliary frequency command 　　 Set parameter F0.03 to select the auxiliary frequency command input, which is the same as the main frequency command input selection method, the specific parameter selection and setting process can refer to "8.2.1 Select the input method of the main frequency command".
  • Page 54 NVF2G Series Inverter User's Guide Name Parameter Description Function code Default value Predetermined area Starting frequency 0.00Hz (0.00 ~ 10.00 ) Hz F1.01 Starting frequency hold time 0.0s (0.0 ~100.0 )s F1.02 DC braking current before (0.0 ~ 100.0 ) % 100 % (inverter rated current) F1.03...
  • Page 55 NVF2G Series Inverter User's Guide Output frequency Motor speed Acc. Motor speed search time Time t Figure 8-3-3 Sequence diagram of speed tracking restart 8.3.2 Shutdown mode 　　 The frequency converter has three stop modes, which are deceleration stop, free stop and deceleration stop + DC braking.
  • Page 56 NVF2G Series Inverter User's Guide Frequency Load speeds Stop naturally by inertia Time t Stop command Figure 8-3-5 Free stop timing diagram 　　 ● Deceleration to stop + DC braking 　 　Set F1.05=2, the inverter decelerates to stop, and after the frequency drops to the starting frequency of F1.06 DC braking at stop, the inverter starts DC braking.

  • Page 57: Motor Parameter Self-Learning

    NVF2G Series Inverter User's Guide X6 terminal X5 terminal Acceleration and deceleration time curve The first group: F0.14 , F0.15 The second group: F8.04 , F8.05 The third group: F8.06 , F8.07 The fourth group: F8.08 , F8.09 Name Parameter Description...

  • Page 58: V/F Control Parameters

    NVF2G Series Inverter User's Guide Function Default Name Parameter Description Predetermined area code value Tuning 0.01A~F2.03 (inverter power<=55kW) Asynchronous motor F2.11 parameters 0.1A~F2.03 (inverter power>55 kW) no-load current 　　 ● Motor static self-learning: suitable for occasions where it is difficult to separate the motor from the load and dynamic tuning operation is not allowed 　...

  • Page 59: Vector Control

    NVF2G Series Inverter User's Guide Output voltage V V lift Output frequency F Torque raises the Basic operating frequency cut-off frequency Figure 8-5-1 General constant torque linear V/F curve 　　 ● Custom multi-point V/F curve: the frequency point setting range is 0.00Hz to the rated frequency of the motor, the voltage point setting range is 0.0% to 100% corresponding to 0V to the motor rated voltage,...

  • Page 60: Overflow Stall Protection

    NVF2G Series Inverter User's Guide is limited by the torque limiter. 8.6.1 Vector speed control parameter setting Function Default Name Parameter Description Predetermined area code value 0: SVC control F0.00 Motor control method 1: V/F control Speed Regulator Proportional Gain 1 F3.01...

  • Page 61: Overvoltage Stall Suppression

    NVF2G Series Inverter User's Guide Output current Stall overcurrent point Time Output frequency Time Figure 8-7-1 Schematic diagram of overflow stall action Name Parameter Description Function code Default value Predetermined area 0: disabled Overrun stall gain FE.07 1: valid Overcurrent stall (100~200 )% FE.08...
  • Page 62 NVF2G Series Inverter User's Guide run command is canceled once, and the inverter will respond only after the run command becomes valid again. 8.9.2 Motor overload protection Name Parameter Description Function code Default value Predetermined area Motor overload 0: disabled FE.00...
  • Page 63 NVF2G Series Inverter User's Guide 　　 1) Input phase loss setting 　 On the premise that the R, S, T three-phase AC power supply of the inverter lacks any one phase, select whether the inverter prompts to input a phase loss fault . When the inverter input phase loss protection is...

  • Page 64: Parameter Description

    NVF2G Series Inverter User's Guide Function Default Predetermined Name Parameter Description code value area Units: communication abnormality E.CE 0: Free parking 1: Shut down according to the shutdown mode 2: keep running Protection action 0x0000 FE.39 0x0000~0x2222 Tens: Reserved selection 2 at fault Hundreds place:E E prome abnormal E.EEP...

  • Page 65: Terminal Function Setting

    NVF2G Series Inverter User's Guide 8.11 Terminal function setting 8.11.1 Digital input terminal function (X) 　　 NVF2G series inverters are equipped with 6 multifunctional digital input terminals as standard, and each input terminal can set the following input terminal functions . Function...
  • Page 66 Serial numbers not listed in the table are "reserved". 8.11.2 Digital output terminal function (DO) 　 　NVF2G series inverters are equipped with 1 multi-function digital output terminal and 2 multi-function relay output terminals as standard, and each terminal can set the following output terminal functions.
  • Page 67 NVF2G Series Inverter User's Guide Parameter Function Default Name Predetermined area Description code value Y1 output function selection F6.01 0 ~ 63 Relay RO1 output selection F6.02 0 ~ 63 Relay RO2 output selection F6.03 0 ~ 63 Valid state setting of output terminal F6.04...
  • Page 68 8.11.3 Analog input terminal function (AI) 　 　NVF2G series inverters are equipped with 2 analog input terminals AI1 and AI2 as standard, both of which support 0V ~ +10V, 0mA ~ 20mA command input, and the voltage and current can be realized through the "jumper switch"...

  • Page 69: Instantaneous Power Failure Continuous Operation Function

    NVF2G Series Inverter User's Guide Simulated output 20mA F6.13=1.60, F6.12=20.0% F6.13=0.80, F6.13=1.60,F6.12=0.0% F6.12=20.0% 10mA F6.13=1.00,F6.12=0.0% F6.13=0.80,F6.12=0.0% 50Hz 25Hz Frequency Figure 8-11-1 Schematic diagram of the effect of output frequency on output gain Name Default value Predetermined area Parameter Description Function code AO1 output function selection F6.08...

  • Page 70: Jogging Operation

    NVF2G Series Inverter User's Guide Bus Voltage 100% Rated Bus Voltage Instantaneous power failure pause to judge the voltage Instantaneous power failure active to judge the voltage Time Instantaneous power failure Output voltage recovery to judge the frequency Hz time...

  • Page 71: Jump Frequency

    NVF2G Series Inverter User's Guide Output frequency Hz Jogging run frequency Time Jogging run dec. Time Jogging run acc. Time jogging Jogging run command(Terminal) Figure 8-13-1 Schematic diagram of jogging operation 8.14 Jump frequency 　 　By setting the jump frequency, the inverter can avoid the mechanical resonance point of the load. NVF2G can set three hopping frequency points, if all hopping frequencies are set to 0, the hopping frequency function will be cancelled.

  • Page 72: Dynamic Braking

    NVF2G Series Inverter User's Guide Frequency Hz Time Fore-backward dead time Figure 8-15-1 Schematic diagram of forward and reverse switching 8.16 Dynamic braking 　 　When the motor decelerates, if the load is too large, the deceleration time is too short, etc., the bus voltage of the inverter may rise to the overvoltage level.

  • Page 73: Timing Operation

    NVF2G Series Inverter User's Guide 8.19 Timing operation 　 　Every time the inverter is started, it starts timing at 0, and the remaining running time of the timing can be viewed through Fd.49. Name Parameter Description Predetermined area Function code...

  • Page 74: Rs485-Modbus Communication Instructions

    NVF2G Series Inverter User's Guide RS485-MODBUS communication instructions 9.1 Networking method 　　 The inverter provides RS485 communication interface, and adopts the international standard Modbus communication protocol for master-slave communication. Users can realize centralized control through PC/PLC , host computer monitoring software, etc. (setting inverter control commands, operating frequency, modification of relevant function code parameters, monitoring of inverter working status and fault information, etc.), to...

  • Page 75: Protocol Applications

    NVF2G Series Inverter User's Guide 9.4.1 RTU mode 　 　In RTU mode, the idle time between frames takes the larger value between the function code setting and the Modbus internal agreed value. The minimum inter-frame idle time agreed within Modbus is as follows: the frame header and frame tail define the frame through the bus idle time not less than 3.5 bytes.
  • Page 76 NVF2G Series Inverter User's Guide Table 9.1 Modbus command code and usage Command code Read inverter parameters, including function code parameters, control parameters and status 0x03 parameters Read the drive parameter attribute value. 0x04 Rewrite a single 16 -bit inverter function code parameter or control parameter.

  • Page 77: Control Commands, Status Information, Fault Information

    NVF2G Series Inverter User's Guide Meaning Bit definition Bit value Decimal value 8-bit unsigned bit data type 16-bit unsigned bit data type 32-bit unsigned bit data type 10~8bit: data type 8-bit signed data type 16-bit signed data type 32-bit signed data type...
  • Page 78 NVF2G Series Inverter User's Guide Table 9.4 Detailed Description of Control Parameters Read and Function Address Power-down Data Meaning Description write Description definition save properties 0x00 : no command 0x01 : Forward running 0x02 : reverse operation Communication 0x03 : stop running...

  • Page 79: Parameter Management

    NVF2G Series Inverter User's Guide Read and Function Address Power-down Data Meaning Description write Description definition save properties set frequency 0x3500 Inverter stop state bus voltage display parameter 0x3501 address Input terminal status 0x3502 Output terminal state 0x3503 PID given value...

  • Page 80: Wiring Instructions

    NVF2G Series Inverter User's Guide 9.8 Wiring Instructions 9.8.1 Topology 　　 No repeater RS-485-Modbus has a trunk cable to which all devices are connected directly (daisy-type) or via short branch cables. 　　 The trunk cable, also known as the bus, can be very long. It must be terminated at both ends. It is also possible to use a repeater between multiple RS-485 Modbus .

  • Page 81: Example Of Modbus Communication

    NVF2G Series Inverter User's Guide Table 9.6 Definition of communication exception code Error code Serial A detailed description (exception code) number no error message 0x00 illegal function number 0x01 illegal data address 0x02 0x03 invalid data value 0x04 Slave failure...
  • Page 82 NVF2G Series Inverter User's Guide setting range of 0~2, then an error response message will appear. 　　 Data sent by the host: 0001 0004 D9C9 Inverter write parameter data address address command content check 　 　Data received by the host:...

  • Page 83: Maintenance And Troubleshooting

    NVF2G Series Inverter User's Guide Maintenance and Troubleshooting 10.1 Contents of this chapter 　　 Due to the influence of the temperature, humidity, dust and vibration of the environment, the aging and wear of the components inside the frequency converter, etc., many reasons will lead to potential failures of the frequency converter.

  • Page 84: Regular Maintenance

    NVF2G Series Inverter User's Guide Table 10.1 Daily inspection reminder list Inspection Check essentials Criterion object Cycle Means of inspection Check content 1.Temperature and humidity 1. Thermometer , hygrometer 1. (-10~+45)℃, (45~55)℃ derating use operating at any 2. Dust, water and drip 2.

  • Page 85: Troubleshooting

    NVF2G Series Inverter User's Guide 　 　Possible causes of damage: bearing wear, blade aging. 　 　Judgment criteria: Whether there are cracks in the fan blades, etc., and whether there is abnormal vibration sound when the machine is turned on. 　　 (2) filter electrolytic capacitor 　　...
  • Page 86 NVF2G Series Inverter User's Guide Fault type Error code Possible cause of failure Countermeasures 1. Motor short circuit to ground Check motor connection Inverter deceleration 2. Potential energy load or load inertia plus suitable dynamic braking E.OV2 running over torque is large...

  • Page 87: Fault Type

    NVF2G Series Inverter User's Guide Fault type Error code Possible cause of failure Countermeasures 1. The motor overload protection coefficient Correctly set the motor overload is not set correctly protection coefficient 2. The motor stalls or the sudden change of...

  • Page 88: Operation Exception Handling

    NVF2G Series Inverter User's Guide Fault type Error code Possible cause of failure Countermeasures Undervoltage fault Grid voltage is low Check input power E.UV The bus voltage fluctuates up and down at Buffer supply E.OL3 seek service the undervoltage point...

  • Page 89: Fault Diagnosis Process

    NVF2G Series Inverter User's Guide Phenomenon Condition Possible Causes Countermeasures Fault alarm Find the cause of the fault and reset the fault If no stop There was a power outage Check power supply command is given, the Check the operation and run command channel...
  • Page 90 NVF2G Series Inverter User's Guide Start Whether any serious fault, such as Please power off immediately no display after Power on or abnormal sound and so on Reference 10.6 table to identify the fault code, Check whether fault Seek service within the scope of id entifiable Reference 10.7 exception...

  • Page 91: Warranty Period

    NVF2G Series Inverter User's Guide Warranty period and environmental protection and other laws and regulations 11.1 Warranty period 　　 Under normal storage and transportation conditions, the product packaging or the product itself is intact, 12 months from the date of purchase by the user or 18 months from the date of production, whichever comes first.

  • Page 92: Appendix A Product Peripheral Components

    NVF2G Series Inverter User's Guide Appendix A Product Peripheral Components A.1 The connection between the product and peripheral devices Table A.1 Description of peripheral components of the main circuit 　 Peripheral Illustrate devices The time characteristics of the circuit breaker should fully consider the time characteristics of the inverter overload protection, the capacity of the circuit breaker is 1.2~2 times the rated current of...

  • Page 93: Reactor Selection

    NVF2G Series Inverter User's Guide Please use the power whin the Three-phase AC power allowed range of inverter Due to the power input, the inverter will flow Breaker into a large impact current, so need to pay attention to the circuit breaker section...

  • Page 94: Classification Table Of Braking Unit And Dc Reactor

    NVF2G Series Inverter User's Guide Inverter model Input reactor DC reactor Output reactor 18.5 kW ACL-0040-EISCL-2 Installation not supported OCL-0040-EISCL-1 22 kW ACL-0050-EISCL-2 Installation not supported OCL-0050-EISCL-1 30 kW ACL-0060-EISCL-2 Installation not supported OCL-0060-EISCL-1 37 kW ACL-0090-EISCL-2 Installation not supported...

  • Page 95: Braking Resistor Table

    NVF2G Series Inverter User's Guide A.4 Braking resistor table 　 　The braking resistor selection of the inverter is shown in Table A.4 : Table A.4 Braking resistor table Voltage (V) Motor power(kW) Resistance value(Ω) Resistance power (W) 1000 1500 18.5...

  • Page 96: Appendix B Parameter Summary

    NVF2G Series Inverter User's Guide Appendix B Parameter Summary Project Illustrate Number of function parameter groups and parameters function code Name The full name of the function parameter Parameter A detailed description of the function parameters Description The unit description is as follows:...
  • Page 97 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code digital setting F0.05 F0.09 ～ F0.08 50.00Hz 0 : run in the default direction Running direction setting 1 : run in the opposite direction F0.06 2 : Reverse operation prohibited output frequency F0.07...
  • Page 98 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code F1 group start-stop control group 0: start from the starting frequency 1: Brake first and then start from the starting Starting mode F1.00 frequency 2: Speed tracking (including direction discrimination)
  • Page 99 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code 0.01A～F2.03 (inverter power<=55kW) Tuning Asynchronous motor no-load F2.11 0.1A～F2.03 (inverter power>55kW) parameters current 0: no operation Motor parameter self-learning 1: Motor static self-learning F2.22 2: Motor dynamic self-learning F3 group reserved parameter group –...
  • Page 100 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code Oscillation suppression active 0 ~ 1000 F4.22 power filter coefficient Oscillation suppression start (0.00 ~ 600.00) Hz F4.23 2.00Hz frequency Oscillation suppression active end (0.0 ~ 300.0)% F4.24...
  • Page 101 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code Setting range: 0x0000 ~ 0x003F Binary settings: 0: normal logic, conduction is valid 1: Logical inversion, valid when disconnected Valid state setting of input Units: F5.07 0x0000 terminal (X1～X6) BIT0～BIT3: X1～X4...
  • Page 102 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code reserve F5.45 reserve F5.46 reserve F5.47 AI1 measured voltage 1 ( 0.000 ~ + 30.000)V F5.48 2.000V AI1 display voltage 1 ( 0.000 ~ + 30.000)V F5.49 2.000V AI1 measured voltage 2 ( 0.000 ~ + 30.000)V...
  • Page 103 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code Y1 output delay time (0.0 ~ 3600.0)s F6.05 0.0s Relay RO1 output delay time (0.0 ~ 3600.0)s F6.06 0.0s Relay RO2 output delay time (0.0 ~ 3600.0)s F6.07 0.0s...
  • Page 104 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code F7 group panel function group 0000: no password user password F7.00 0000 Other: password protection 0: no lock 1: Full lock Keypad lock function 2: reserved F7.01 3: All locked except PRG/S key (SHIFT function)
  • Page 105 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code 0: Only valid for panel control 1: Valid for panel and terminal control STOP key stop function selection F7.08 2: Valid for panel and communication control 3: Valid for all control modes Speed display gain F7.09...
  • Page 106 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code (0.0~300.0)% F8.26 100.0% Current reaches detection value 2 Current arrival detection 2 (0.0~300.0)% F8.27 0.0% amplitude Module temperature reaches (0~100) ℃ F8.28 75 °C 0: run in automatic mode F8.29...
  • Page 107 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code Maximum reverse deviation (0.00 ~ 100.00)% F9.13 1.00% between two outputs 0: The closed-loop output is negative, and the Closed-loop output reversal inverter runs at the lower limit frequency F9.14...
  • Page 108 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code Setting range: 0x0000 ~ 0x0315 Units: frequency source 0: multi-band frequency N 1~5: reserved Tens place: running direction 0: forward rotation Phase 1 Setup FA.01 0x0000 1: reverse...
  • Page 109 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code FA.42 (-100.0 ~ 100.0)% 0.0% Multi-segment instruction 12 FA.43 Multi-stage instruction 13 (-100.0 ~ 100.0)% 0.0% FA.44 Multi-segment instructions 14 (-100.0 ~ 100.0)% 0.0% FA.45 Multi-segment instruction 15 (-100.0 ~ 100.0)%...
  • Page 110 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code Output current (0.0 ~ 3000.0) A (relative to 0.0 ~ 3.0 Ie) 0.0A Fd.07 Operating speed (0 ~ 60000)rpm 0rpm Fd.08 (-300.0 ~ +300.0)% (compared to twice the rated Output torque Fd.09...
  • Page 111 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code Process closed-loop given (0.0 ~ 100.0)%(relative to the percentage of full scale) 0.0% Fd.28 Process Closed Loop Feedback (0.0 ~ 100.0)%(relative to the percentage of full scale) 0.0% Fd.29...
  • Page 112 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code Power-on short-circuit protection 0: invalid FE.09 selection 1: effective 0: invalid Instantaneous power failure 1: slow down FE.13 action selection 2: Deceleration to stop Instantaneous operation pause (80.0~100.0)%(standard bus voltage) FE.14...
  • Page 113 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code 23: reserved Abnormal motor self-learning E.tE 25: reserved 26: reserved 27: reserved 28: reserved 29: reserved 30: reserved 31: Undervoltage E.Uv 32: Buffer power overload E.OL3 33: Motor short circuit to ground E.StG FE.29...
  • Page 114 NVF2G Series Inverter User's Guide Function Name Parameter Description Defaults Change code 0x0000 ~ 0x2222 Ones place: drop load E.LL 0: Free parking 1: decelerate to stop 2: Jump directly to 7% of the rated frequency of the motor to continue running, and automatically...
  • Page 116 NVF2G Series Inverter User's Guide 0463v1614.EN...

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