NFO Drives NFO Sinus Optimal Scheda tecnica

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Operating and

Installation

Manual

NFO Sinus Optimal

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NFODrivesAB2020ManualOptimalver.1.1english2

Contents

1Safety aspects.....................................................................................................................................4

2Technical data.....................................................................................................................................5

3Mechanical installation.......................................................................................................................7

3.1Mounting..................................................................................................................................7

4Electrical installation...........................................................................................................................8

4.1Signal terminal connection....................................................................................................9

4.1.1Wiring.........................................................................................................................9

4.2Signal terminals and their use..............................................................................................9

4.2.1Signalterminalsconfiguration..................................................................................11

4.2.2Analoguecurrentinput.............................................................................................11

4.2.3NegativeLogic...........................................................................................................12

4.2.4SerialchannelRS485.................................................................................................12

4.2.5Connectingpotentiometer.......................................................................................12

4.3Power Terminal connection.................................................................................................13

4.3.1Connectorsandcables..............................................................................................13

4.3.2Powerterminaluse...................................................................................................13

4.3.3Connectingmainssupply..........................................................................................14

4.3.4Connectingmotor.....................................................................................................14

5Parameter settings and operation..................................................................................................15

5.1General notes........................................................................................................................15

5.2Keyboard and display..........................................................................................................15

5.3Indicators and Motor status.................................................................................................17

5.4Operating modes..................................................................................................................17

5.4.1Manualmode............................................................................................................18

5.4.2Automode................................................................................................................18

5.4.3Serialchannel/Fieldbusmode.................................................................................19

5.5Parameter specifications.....................................................................................................20

5.6Autotuning and motor parameters......................................................................................23

5.6.1Autotuning................................................................................................................24

5.6.2Alternativetuningmethods......................................................................................24

5.6.3Motorsinparallel.....................................................................................................25

5.7Setting control parameters..................................................................................................25

5.7.1Controlmode,parameterMode...............................................................................25

5.7.2Accelerationandretardationramp,AccelerationandDeceleration........................25

5.7.3Rundelay,PowerOnDelay.......................................................................................26

5.7.4Motorbrake,DC‐Brake.............................................................................................26

5.7.5Autostart,AutoStart................................................................................................26

5.7.6Stopmode,StopMode.............................................................................................27

5.7.7Energysavefunction,EnergySave...........................................................................27

5.7.8Speedregulator,Kp‐speedandTi‐speed..................................................................27

5.7.9Frequencysleepsetting,FrqSleep...........................................................................28

5.7.10Frequencybypass,Bypass‐frandBypass‐BW...........................................................28

5.8Frequency control without load compensation, Freque mode.......................................29

5.8.1Setpointsourceforfrequency,SetpSource.............................................................29

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5.8.2Fixedfrequencysetpoints,FixFrq1‐FixFrq7.........................................................30

5.8.3Analoguefrequencysetpointrange,MinAinFrqandMaxAinFrq..........................30

5.9RPM regulation with speed estimation, Speed mode.....................................................30

5.9.1Setpointsourceforspeed,SetpSource....................................................................30

5.9.2Fixedspeedsetpoints,FixSpd1‐FixSpd7..............................................................31

5.9.3Analoguespeedsetpointrange,MinAinSpdandMaxAinSpd...............................31

5.10Process regulation, PI regulator.........................................................................................31

5.10.1Setpointsource,processregulation.........................................................................32

5.10.2Fixedprocessregulatorsetpoints,FixReg1‐FixReg7...........................................33

5.10.3Sensor.......................................................................................................................34

5.10.4Regulatorsetting,RegAmp,RegKpandRegTi.......................................................34

5.11Motor safety functions..........................................................................................................34

5.11.1PTCinput...................................................................................................................34

5.11.2Electronicmotoroverloadprotection......................................................................35

5.12Output signals to display.....................................................................................................36

5.12.1Relay1(Faultrelay)..................................................................................................36

5.12.2Relay2(Runindication)............................................................................................36

5.12.3Analogueoutput1(voltageandcurrent).................................................................36

5.12.4Analogueoutput2(voltageandcurrent).................................................................37

5.13Reset to factory settings......................................................................................................37

5.14Alarm and fault procedures.................................................................................................37

5.14.1Faultlog....................................................................................................................38

5.14.2Faultmessages..........................................................................................................38

5.14.3Acknowledgefault....................................................................................................38

6Brake chopper and power surge regulator...................................................................................41

7Getting started...................................................................................................................................42

7.1Running in Manual mode.....................................................................................................42

7.2Running in Auto mode at fixed frequency.........................................................................42

7.3Running from terminal, fixed setpoint................................................................................43

7.4Running with analogue setpoint.........................................................................................43

7.5Process regulation with fixed setpoint...............................................................................43

7.6Process regulation with analogue setpoint.......................................................................44

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NFODrivesAB2020ManualOptimalver.1.1english4

Introduction

The frequency inverter described in this operating manual is used for frequency (Hz) or speed (rpm) control of

three-phase ac induction motors. This manual describes how to install and use the inverter.

Read the manual carefully before installing the inverter, to ensure you install it correctly and get the maximum

performance out of it.

The inverter has a patented switch circuitry that ensures the motor receives a sinusoidal voltage at all times, under

all operating conditions. This solves all problems related to conventional PWM based frequency inverters, e.g.

electromagnetic interference, ball bearing damages, high earth current and high switching noise.

A 30mA rated RCD (earth leakage circuit breaker) can be used with this frequency inverter.

The inverter also uses the patent "Natural field orientation" which is a vector control method to give perfect speed

control of induction motors all the way from zero to full speed.

1 Safety aspects

Always disconnect the inverter from the mains supply before working on any electrical- or mechanical installation

components.

Installation, maintenance and repairs must always be conducted by staff adequately trained and experienced for

the purpose.

Modifying or replacing any components of the inverter or its accessories will render the inverter warranty null and

void. Should the need for any modifications or replacements arise, always contact NFO Drives AB.

Components in the power section and some components in the signal section are connected to the mains supply

when the inverter is powered.

WARNING! Touching any components with the mains supply connected can be fatal! Always

disconnect the mains supply before opening the cover.

WARNING! Even when disconnected from the mains supply, the inverter may still contain lethal voltages

due to its buffer capacitors. Always wait at least five minutes to make sure no voltage remains before

working on the inverter.

WARNING! The heat sink of the inverter may get hot, depending on operating conditions. Do not touch.

For connection of mains supply, the inverter shall be permanently connected to fixed wiring including a circuit

breaker which must be used to ensure all-pole disconnection under overvoltage III conditions.

The inverter shall always be connected to protective earth (P.E.) when the mains supply is connected.

If the motor temperature sensor (PTC/Klixon) functionality is used, the sensor and its wiring must supply

adequate isolation and comply with installation requirements for the equipment in use.

The level of integrity offered by the drive control input functions – for example stop/start, forward/reverse and

maximum speed, are not sufficient for use in safety-critical applications without independent channels of

protection. All applications where malfunction could cause injury or loss of life must be subject to a risk

assessment and further protection provided where needed.

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2 Technical data

Table 1. Inverter ratings for 380-480V 3~ 50/60 Hz Type TN electrical supply network

Art. no.

Rated

output

power

Rated

output

current

[1]

Max

output

current

[2]

Apparent

output

power

[3]

Absolute

losses

[4]

L,CDM(90,100)

Efficiency

class

[5],[6]

Standby

power

[7]

Size [mm] Weight

[kg]

NFO

3A4D3490D 2.2 kW 1.0-4.9 A 5.8 A 3.3 kVA 0.14 kW IE2 7.5 W 390x190x160 7.0

Notes:

[1] The inverter is optimized for use at a wide range of nominal motor currents in the range of 0.37 kW to 2.2 kW.

[2]

The inverter application should not be dimensioned for higher continuous current than Rated output current.

However, it can supply Max output current for infinite time, but it may be detrimental to its life span.

[3]

Apparent output power Sr,equ used for IE (International Efficiency) classification.

[4]

Measured at a current displacement factor (cos ) of 0.77.

[5]

CDM (Complete Drive Module) efficiency class according to Commission Regulation (EU) 2019/1781 and

IEC 61800-9-2:2017.

[6]

Due to sinusoidal voltage output from the NFO inverter, the expected additional harmonic losses in the motor,

which are present when using a PWM inverter, are now absent.

IEC 61800-9-2:2017: “When [three-phase induction motors] are operated on a CDM, additional harmonic

losses PLHL = rLHL × PLTsin are caused by the non-sinusoidal voltage supply”. The increase of motor losses as a

result of PWM operation (rLHL) are estimated to 15% of the total losses. According to the reference model for a

2.2kW IE2 or IE3 induction motor, this corresponds to about 0,05 kW.

When determining the overall efficiency of the PDS (Power Drive System, i.e. inverter and motor together), it

should be taken into account that motor losses are approximately 15% lower when using an inverter with

sinusoidal voltage output, than it would be if using a conventional PWM inverter.

[7]

No external control equipment connected to the 24V supply output, and cooling fan regulator at low speed.

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Table 2. Common data

Inverter output

Output volta

e wave form Sinusoidal

Output frequenc

–

150 Hz

Control modes

Frequenc

control 0

–

150 Hz, Vector control without slip compensation

Speed control 0

–

9000 rpm, Vector control with slip compensation

ulators

Process control PI with extern analo

ue feedback in all control modes

Speed re

ulator Re

ulator for optimal d

namic performance

I/O No. Name Confi

urable levels

ital control inputs 8 DIN1

–

DIN8

Analogue control inputs 2 AIN1, AIN2 0-10V, 2-10V, ±10V,

0-20mA, 4-20mA, ±20m

, Pot

ital outputs 2 Re1, Re2 Rela

, max 50VDC

Analogue outputs 2 AOUT1, AOUT2 0-10V, 2-10V, ±10V,

0-20mA, 4-20mA, ±20m

Volta

e output 1 +24V max 200m

Serial control 2 USB 2.0 T

pe B, RS485

Serial protocols 2 Modbus RTU, NFO

Fieldbus options CAN open, Profibus DP, Profinet, Modbus TCP, BACnet [1]

Motor safet

Thermistor input PTC or Klixon

Electronic motor overload

protection Switch off if motor is loaded over rated power for a long time

Ambient conditions

mbient operatin

temp. -10 – +45 C

Stora

e temp. -20 – +60 C

Humidit

–

90%, non-condensin

Protection class IP55 accordin

to SS-EN 60529

EMC certification

Emissions: EN 55011:2016 EN, 55011/A1:2017, EN 61000-3-3:2013

Immunity: EN 61000-6-2:2005, EN 61000-4-2, -3, -4, -5, -6, -11

For use without shielded cables or additional EMC filter.

Electrical safety

Low Voltage Directive EN 61800-5-1:2007, EN 61800-5-1/A1:2017

Motor terminal short circuit protection [2] according to IEC 60364-4-41:2005 /

AMD1, clause 411. The short circuit protection functionality operates

regardless of motor cable area, cable length, or other cable properties, and

ardless of mains power suppl

impedance.

Climatic tests Dry heat test IEC 60068-2-2

Damp heat test IEC 60068-2-78

Vibration test IEC 60068-2-6

Notes:

[1] Limited availability for all fieldbus options.

[2] If short circuit should occur, the inverter may get damaged. However, it will prevent damage of connected

equipment, fire and other hazards.

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3 Mechanical installation

When unpacking the inverter, carefully inspect the product and make sure it has not been damaged during

transportation. Inverter with cracks, dents or other visual damage shall not be installed.

The inverter must not be installed such that outlet air from another inverter or other equipment blows directly

into the inverter air intake. A minimum of 80 mm clearance must be kept above and below the inverter, and a

minimum of 20 mm vertical gap must be kept between inverters, to ensure sufficient air flow.

All terminals are accessed by opening the plastic cover. To be able to use the snap-and-hold-open

functionality of the cover, a free space of 200 mm is required above the inverter.

During installation, it is important that no foreign object, such as borings or screws, fall into the inverter as a

short circuit may occur.

After installation, make sure all grommets at the cable entries are mounted and the cover is closed and

secured with its screws to avoid touching dangerous voltage.

3.1 Mounting

Unscrew the two lower captive screws and loosen the inverter from the backplate. Fasten backplate to a vertical

surface using four screws. Make sure that the top mounting screws are sufficiently strong to hold the entire weight

of the inverter. Place the inverter on the backplate by mating the chassis cut-out to the backplate hooks. Tighten

the lower captive screws on both sides.

The cover is opened by unscrewing the two captive screws in the plastic cover and fold up the cover until it snaps

tight. There are two possible positions for the cover. Close the cover by pulling it out and fold down. Be careful not

to break the snaps in the cover when folding down. Tighten the screws in the plastic cover.

The plastic cover can be removed by unscrewing the two upper screws after the cover is opened. The cable from

the cover to the control board must be carefully removed from the control board. Replace in reverse order.

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4 Electrical installation

The following schematics shows the inverter default connections and default functions of the I/O:

Fig.1. Default configuration

Terminals 11, 12 30 and 31 (0V) are connected to PE with a 1MΩresistor but can be connected galvanically to PE

via an external jumper to terminal 19 or 36 (PE). These terminals may vary in terms of potential by up to 100 V from

PE. The USB contact is galvanically connected to 0V.

AIN1.N and AIN2.N are connected to 0V by jumpers J701 and J703.

Warning! If option Autostart is ON and there is a run signal to the inverter (DIN1, terminal 1), the inverter will

start the motor when powered up.

An external brake-resistor must be fitted if the retardation time is less than 5 sec, see section 6.

Warning! If the Motor Safety Thermistor is to be used, jumper J802 must be set accordingly, see 5.11.1.

Note! A motor safety switch can be mounted between the inverter (terminals U, V and W) and the motor, but

it must only be operated (switched off or on) when the motor is not running.

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4.1 Signal terminal connection

The signal terminals are of type “tension clamp spring connection” with a usable cable cross-section of 0.13 - 2.5

mm² (AWG 26 - AWG 14). To connect the cable, carefully push the actuator downward. If a tool is used, make sure

it does not damage any components on the circuit board!

4.1.1 Wiring

The signal lines should be fixed to the PCB with at least 2 straps.

Fig. 1. Signal line wiring.

Make sure the signal wires have sufficient isolation when passing power cables.

4.2 Signal terminals and their use

The following control signals with its default configuration are available:

Term. Name Function Default function description

1 DIN1 Di

ital input 1 Run si

nal Start/stop

2 DIN2 Di

ital input 2

3 DIN3 Di

ital input 3 Direction of rotation

4 DIN4 Di

ital input 4

5 DIN5 Di

ital input 5 Select fixed frequenc

(

see table 8 pa

e 19

)

6 DIN6 Di

ital input 6 Select fixed frequenc

(

see table 8 pa

e 19

)

7 DIN7 Di

ital input 7 Select fixed frequenc

(

see table 8 pa

e 19

)

8 DIN8 Di

ital input 8 PTC motor protection

9 +24V

+24V max 200mA regulated voltage to digital inputs or external

transmitters. Short circuit protected. Could also be used for

auxiliar

control power suppl

10 +24V

11 0V 0V, I/O Ground

12 0V

13 RE1.NO Rela

1 NO Fault relay, potential-free contact max 1 A, 50 V DC.

If fault present, terminals 14 are 15 closed.

14 RE1.COM Rela

1 COM

15 RE1.NC Rela

1 NC

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16 RE2.NO Rela

2 NO Run indication, potential-free contact max 1 A, 50 V DC.

Terminals 16 and 17 are closed when motor is running.

17 RE2.COM Rela

2 COM

18 RE2.NC Rela

2 NC

19 PE Protective earth

IN1.P

nalo

ue input 1, pos

nalo

ue setpoint input, positive

IN1.N

nalo

ue input 1, ne

nalo

ue setpoint input, ne

ative

(

0V, I/O Ground

)

IN2.P

nalo

ue input 2, pos Process re

ulator actual value input, positive

IN2.N

nalo

ue input 2, ne

Process re

ulator actual value input, ne

ative

(

0V, I/O Ground

)

OUT1.I

nalo

ue output 1, I Current output 1

OUT1.U

nalo

ue output 1, U Volta

e output 1, impedance 50Ω

OUT2.I

nalo

ue output 2, I Current output 2

OUT2.U

nalo

ue output 2, U Volta

e output 2, impedance 50Ω

28 +24V +24V (same as terminal 9 and 10)

29 +24V

30 0V 0V, I/O Ground (same as terminal 11 and 12)

31 0V

32 RS485.

RS 485,

33 RS485.

34 RS485.B

RS 485,

35 RS485.B

36 PE Protective earth

Table 3. Signal terminals and their use

Digital inputs (terminals 1 - 8), positive logic:

Maximum input voltage: 30V

Switch level: 13V (input voltage higher than switch level is considered as active level)

Impedance: 10kΩ

Digital inputs (terminals 1 - 8), negative logic:

Maximum input voltage: 30V

Switch level: 9V (input voltage lower than switch level is considered as active level)

Impedance: 10kΩ

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