NFO Drive Sinus Series Fiche technique

NFO Drives AB

Box 35, SE-376 23 Svängsta, Sweden

Tel: +46 (0)454-370 29

Fax: +46 (0)454-32 24 14

Email: [email protected]

Internet: www.nfodrives.se

Operating and

installation manual

NFO Sinus

1.5 – 11 kW 400V

NFO Drives AB. Version 3.1 eng (*) Only available together with I/O card 2

Contents

1Introduction .............................................................................................................................................................4

2Safety aspects........................................................................................................................................................... 4

3Technical data..........................................................................................................................................................5

4Installation ................................................................................................................................................................6

4.1 Typical installation.....................................................................................................................................6

4.2 Connecting mains supply......................................................................................................................... 7

4.3 Connecting motor ....................................................................................................................................8

4.4 Terminal connections...............................................................................................................................8

4.4.1 Power terminal use ..................................................................................................................8

4.4.2 Signal terminals and their use.................................................................................................9

4.4.3 Connecting serial channel RS232 ........................................................................................11

4.4.4 Connecting serial channel RS485 ........................................................................................11

4.5 Installation and ventilation.....................................................................................................................11

5Installation and programming .............................................................................................................................12

5.1 General notes ..........................................................................................................................................12

5.2 Keyboard and display .............................................................................................................................12

5.3 Operating modes.....................................................................................................................................13

5.3.1 Local mode...............................................................................................................................14

5.3.2 Programming mode................................................................................................................14

5.3.3 External mode.........................................................................................................................15

5.3.4 Serial channel mode ...............................................................................................................16

5.4 Parameter specifications........................................................................................................................17

5.5 Autotuning and motor parameters .....................................................................................................21

5.6 Setting control parameters ...................................................................................................................23

5.6.1 Control mode, parameter Mode .........................................................................................23

5.6.2 Acceleration and retardation ramp, parameters Accel and Retard ...............................24

5.6.3 Run delay, parameter RunDly ...............................................................................................24

5.6.4 Motor brake, parameter DC-Brk..........................................................................................24

5.6.5 Autostart, parameter AutoSt.................................................................................................25

5.6.6 Stop mode, parameter StMode ............................................................................................25

5.6.7 Speed regulator, parameters Kp-spd and Ti-spd................................................................25

5.6.8 Frequency bypass, parameters Byp-fr and Byp-bw ............................................................26

5.6.9 Field bus protocol, parameter AnyBus................................................................................27

5.7 RPM control with frequency estimation, Freque mode...................................................................27

5.7.1 Setpoint source for frequency, parameter OpMode........................................................27

5.7.2 Fixed frequency setpoints, parameters F-fix1 - F-fix7 ......................................................28

5.7.3 Analog frequency setpoint range, parameters Fr-min and Fr-max.................................28

5.8 RPM regulation with speed estimation, Speed mode.......................................................................28

5.8.1 Setpoint source for speed, parameter OpMode...............................................................29

5.8.2 Fixed speed setpoints, parameters C-fix1 - C-fix7...........................................................29

NFO Drives AB. Version 3.1 eng (*) Only available together with I/O card 3

5.8.3 Analog speed setpoint range, parameters Sp-min and Sp-max ......................................29

5.9 Torque regulation, Torque mode .........................................................................................................30

5.9.1 Torque regulation setpoint source, parameter OpMode ...............................................30

5.9.2 Fixed torque setpoints, parameters T-fix1 - T-fix7...........................................................30

5.9.3 Analog torque setpoint range, parameters Tq-min and Tq-max ....................................31

5.10 Process regulation, PI Reg mode ..........................................................................................................31

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

5.10.2 Fixed process regulator setpoints, parameters R-fix1 - R-fix7 ......................................33

5.10.3 Analog regulator setpoint from temperature sensor (*)...............................................33

5.10.4 Regulator setting, parameters RegAmp, RegKp and RegTi ..............................................33

5.11 Motor safety functions ...........................................................................................................................33

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

5.11.2 Power monitor .......................................................................................................................34

5.12 Output signals to display (*) .................................................................................................................34

5.12.1 Function relay (*) ...................................................................................................................35

5.12.2 Analog voltage output (*).....................................................................................................35

5.12.3 Frequency output (*).............................................................................................................35

5.13 Reset to factory settings........................................................................................................................36

5.14 Alarm and fault procedures ..................................................................................................................36

5.14.1 Fault log....................................................................................................................................36

5.14.2 Fault messages ........................................................................................................................37

6Brake chopper and power surge regulator.....................................................................................................40

7Getting started ......................................................................................................................................................41

7.1 Running in local mode............................................................................................................................41

7.2 Running at fixed frequency....................................................................................................................41

7.3 Running from terminal, fixed setpoint................................................................................................41

7.4 Running with analog setpoint................................................................................................................42

7.5 Torque control with analog setpoint..................................................................................................42

7.6 Process regulation with analog setpoint.............................................................................................42

8Your own parameter settings ............................................................................................................................43

NFO Drives AB. Version 3.1 eng (*) Only available together with I/O card 4

1 Introduction

The frequency inverter described in this operating manual is used for speed (RPM) and torque control of three-phase

induction motors. This manual tells you 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.

NFO Sinus is a frequency inverter which uses the patent "Natural field orientation" system to give perfect speed control of

induction motors all the way from zero to full speed.

The inverter also has a patented switch connection that ensures the motor is fed a perfect sinus voltage at all times under all

operating conditions.

2 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.

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

supply before removing the front panel. Never open the inverter side panels.

WARNING! Even when disconnected from the mains supply, the inverter may still be live on account of its buffer

capacitors. Always wait at least five minutes, and take test readings between the + and – terminals to make sure no

voltage remains before starting working on the inverter.

The inverter must always be earthed when mains supply is connected.

NFO Drives AB. Version 3.1 eng (*) Only available together with I/O card 5

3 Technical data

Motor output

Motor rating (kW) 1.5 2.2 3 4 5.5 7.5 11

Continuous rating (A) 3.5 4.9 6.7 8.8 11.1 14.8 21.5

Maximum rating (A) 4.2 5.8 8.0 10.5 13.3 17.7 25.8

Output voltage wave form Sinus

Output frequency 0 – 150 Hz

Operating mode 4 quadrant (with external brake resistance, as required)

Inverter input

Supply voltage 3 x 380 – 440V +/-10%

Frequency 50/60 Hz (+/-10%)

Control inputs

Setpoints 0-10V, 2-10V, ±10V, 0-20mA, 4-20mA, ±20mA, potentiometer 10kΩ,

7 set frequencies selectable from terminal with positive or negative logic

Actual values 0-10V, 2-10V, ±10V

Local mode Keyboard: Forward, Reverse, Stop

Acceleration time 0.2 – 500s

Retardation time 0.2 – 500s

Signal outputs

Voltage (*) 0 – 10V

Frequency (*) 0 – 32kHz, open collector

Relay Fault relay, operating relay, function relay (*)

Control modes

Frequency control 0 – 150 Hz

Speed control 0 – 9000 rpm

Torque control 1 – 200% of nominal motor torque, depending on inverter capacity

Process control PI with feedback, temperature sensor PT1000 for recording temperature at constant

pressure control in the ventilation system (*), 24V supply to external sensors (*)

Motor safety

Thermistor input PTC or Klixon

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

Ambient conditions

Ambient temp. -10 to +40 °C

Storage temp. -20 to +60 °C

Humidity 0 – 90%, non-condensing

Protection class IP20

Dimensions 365 (+47) x 265 x 70

365 (+47) x 265 x 123 365 (+47) x 265 x 203

Weight 4.9 kg 6.5 kg 14 kg

Functions marked (*) only available together with I/O card.

NFO Drives AB. Version 3.1 eng (*) Only available together with I/O card 6

4 Installation

All terminals are accessed via the lower front panel, fitted with four screws, remove.

Please note that the inverter must not be run for more than one minute with the front panel removed, as this affects the

airflow through it.

4.1 Typical installation

UVWPE

L1 L2

RXD

TXD

RTS

CTS

GND

RS 232

Modular contact

11312 4310

Current input, 0/4-20mA

Potentiometer, 10k

Ω

Voltage input, 0/2-10V

Run signal start/stop

Direction of rotation

Fixed frequency 1

Fixed frequency 2

Fixes frequency 3

5 14 6 15 26 25

REV

PTC

FIX1

FIX2

FIX3

RUN

SIO- SIO+

+- B

Fault relay/

alarm output

RS 485

L3 PE

Braking

resistance

(optional)

I/O ground

16 7

Run

indicator

Digital inputs

max 24V

82817

L2 L3 PE

920 21 22 23

+12V

18 29

Motor safety thermistor (PTC)

PTC pre-connection resistance 3,9 k

Ω

11 24

Actual value input

process regulator

VOLTAGE

Fig.1. Typical configuration

Warning! If there is a run signal to the inverter (terminal 5), the inverter will start up when power is applied.

Terminals 21, 22, 23 and 24 (I/O ground) can be connected galvanically to PE via jumper S4 (not supplied with installation).

These terminals may vary in terms of potential by up to 100 V from PE if S4 is not fitted. The RS 232 contact is always

connected galvanically to PE.

The negative power input (terminal 2) is connected to I/O ground (terminals 21 - 24) via jumper S3 (supplied fitted). Remove

this jumper and the common-mode voltage at the power input (terminals 2 and 10) may vary by up to +/-24V from I/O

ground. This is designed to be used when a number of current controlled units are connected in series.

The inverter can be configured for negative logic at the digital inputs (terminals 5, 6, 14, 15 and 26) by moving jumper S1 (see

Fig. 3). The inputs are then made active by connecting them to the I/O ground (terminals 21 – 24), see Fig. 2 .

NFO Drives AB. Version 3.1 eng (*) Only available together with I/O card 7

Run signal start/stop

Direction of rotation

Fixed frequency 1

Fixes frequency 2

Fixed frequency 3

5 14 6 15 26

FWD/

REV

FIX1

FIX2

FIX3

RUN

I/O ground

21 22 23 24

25 20

Motor safety resistor (PTC)

PTC pre-connection resistance 3,9 k

Ω

+12V

Pos. logicNeg. logic

RS 232

RS 485RS 232

S1S2 S3

Fig. 2. Connection via negative logic

(jumper S1 moved)

Fig. 3. Jumper locations (shown as

supplied)

All signal lines should be installed with shielded cables, with the cable shields being connected to the safety earth at one end.

The reason for recommending shielding is that signal cables laid alongside power cables are prone to interference, so the

inverter can be fed incorrect setpoints.

When running with a potentiometer, this should have a tolerance of better than 5% so the setpoint is not outside the

permitted range. The inverter can be configured to give an alarm if the setpoint is out of limits using the Ain Fail fault.

An external braking resistance must be fitted if the retardation time is less than 5 sec, see section 6.

If in any doubt as to installation, always contact NFO Drives AB.

4.2 Connecting mains supply

Three-phase feed inverters are connected to a three-phase mains network at a nominal voltage of 380 – 440 V 50/60 Hz

between terminals L1, L2, L3 and PE. PE = ground, see Fig.1.

Recommended slow-blowing fuses for three-phase supply:

1.5 kW 2.2 kW 3 kW 4 kW 5.5 kW 7.5 kW 11 kW

6 A 10 A 10 A 16 A 16 A 25 A 35 A

With the mains supply connected correctly and the motor running, the inverter draws less than 2 mA earth current in the

PE core.

NFO Drives AB. Version 3.1 eng (*) Only available together with I/O card 8

4.3 Connecting motor

Connect motor cables between terminals U, V, W and PE.

The nominal motor voltage for three-phase fed inverters is 400V, so a motor with a nominal voltage of 400 V Y / 230 V D

must be Y-connected and a motor with nominal voltage of 690V Y / 400 V D must be D-connected.

Current EMC standards can be met without shielded motor cable if the inverter is correctly installed

otherwise. There is no limit on motor cable length, as the inverter always supplies a sinus voltage to the

motor; but voltage drop in cables must be allowed for.

4.4 Terminal connections

B - + L3 L2 L1 PE PE W V U

Fig. 4. Power terminal appearance, three-phase supply

4.4.1 Power terminal use

Terminal Function Description

B Braking resistance Connection for external braking resistance (between B and +)

- - DC link voltage. Nominal voltage:

+ + At three-phase feed 400 V: 565 V DC

L2 Mains supply, phases Mains supply 3 x 380–440V

PE Safety earth Power supply safety earth

PE Safety earth Safety earth connection motor

V Motor connection Motor connection

Table 1. Use of power terminals

If installing a number of inverters with one or more running in regenerative mode, the inverter DC links (terminals + and -)

can be connected to one another so these inverters supply energy to the others. Thanks to component tolerances in the

inverter, the link voltage may vary slightly from one model to another, so an equalising resistance and ultra-fast fuse must be

fitted to each line. Contact NFO Drives AB for correct dimensions.

NFO Drives AB. Version 3.1 eng (*) Only available together with I/O card 9

4.4.2 Signal terminals and their use

Term. Function Description

1 +12V

9 +12V +12V unregulated voltage to digital inputs, max 50mA

20 +12V

21 COMMON

22 COMMON I/O ground

23 COMMON

24 COMMON

5 RUN Run signal

14 REV Direction of rotation, see Table 6.

6 FIX1 Select fixed frequency, see Table 6.

15 FIX2 Select fixed frequency, see Table 6.

26 FIX3 Select fixed frequency, see Table 6.

25 PTC PTC motor protection, requires resistance at 3.9 kΩconnected to +12 V

12 PLUS POT Potentiometer input 10 kΩ, positive limit, see also Table 7.

13 POT Potentiometer input 10 kΩ, central takeoff

4 MINUS POT Potentiometer input 10 kΩ, negative limit

3 VOLTAGE Voltage setpoint input, see Table 7.

10 CURRENT + Current setpoint input, positive potential, see Table 7.

2 CURRENT - Current setpoint input, negative potential.

28 ALARM A

17 ALARM B Fault relay, potential-free contact max 1 A, 50 V DC.

8 ALARM C If fault in inverter, terminals 17 and 18 close.

27 MOTOR_RUN A

16 MOTOR_RUN B Run indication, potential-free contact max 1 A, 50 V DC.

7 MOTOR_RUN C Terminals 7 and 16 are closed when motor is running.

18 SIO- RS 485, negative input

29 SIO+ RS 485, positive input

11 ACT_VOLTAGE Process regulator actual value input.

Table 2. Signal terminals and their use

Digital inputs (terminals 5, 6, 15, 25 and 26) under positive logic:

Maximum input voltage: 30V

Switch level: approx. 4V

NFO Drives AB. Version 3.1 eng (*) Only available together with I/O card 10

Digital inputs (terminals 5, 6, 15, 25 and 26) under negative logic:

Maximum input voltage: 30V

Switch level: approx. 7.5V

I/O ground

(plint 21 - 24)

Analog

output

0-10V,

max. 3mA

Frequency

output

Open collector

max. 24V,

10m

58 60

57 59 61 63

+5V

54 67 65 66

+24V

52 75

External power

supply 24V, max 40mA

Passiv

temp. sensor

PT1000

51 53

Function-

relay

Fig. 5. Connecting expansion board

Term. Function Description

50 RELAY B Function relay, potential-free contact max. 2 A, 50 V DC, 50 W. see section 5.12.1

51 RELAY A Function relay

52 +24V +24V, max. 40mA

53 RELAY C Function relay

54 +24V

55 COMMON Reference ground

56 FREQ OUT Frequency output, max. 24V 10 mA ,Open Collector, see section 5.12.3

57 COMMON

58 COMMON

59 COMMON

60 VOLT OUT Analog voltage output, max. 10V 3mA, see section 5.12.2

61 COMMON

62 COMMON

63 COMMON

65 COMMON

66 PT1000 Temperature sensor PT1000, process regulation, see section 5.10

67 COMMON

75 +24V

Table 3. Signal terminals and their use, I/O board.

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