CFW11 Training Sep 3 2015 - Zest WEG · PDF fileRevision Performed by Summary Date 00 Andre vd...

CFW-11

WEG Drive

Revision Performed by Summary Date

00 Andre vd Linde New document June, 2015

1

What Makes Zest Different ?

� Technical Support

� Commissioning Support

� Stock Levels

� High Quality Product

� Wide range of products available

� "No Quibble" Approach

� User Friendly

� Free Training



2

The CFW11 is a variable-speed drive intended for use with asynchronous motors when various applications are to be met. Offering excellent cost-effectiveness, it comes with plug and play technology, accessories incorporated in the standard version and simple operation. Beyond a specific hardware designed for this purpose it also brings in specific functions to perform according to market needs.

Power & Torque

p = Power (watts) n = Rotational speed (revs per second) P = Power (kW) (Ability to deliver Torque to the load at rated Speed) N = Rotational speed (revs per min) (P002)

T = Torque (Nm) (available on shaft) (P009)

Definitions

� Power - Measure of Work done in a unit of time -

(Rate of doing work) (kW) (Torque x Speed)

� Torque = Force (N) X Radius (meter)

� Load Torque - Actual torque produced, is determined by the demand

of the load.

� Motor Torque – T available on the shaft (T=kΦI)

95502

TNPnTp

×=∴= π

N

PT

9550×=



3

Types of Loads Loads can be grouped into five categories:

� Variable Torque ±60% of all loads

� Constant Torque ±35% of all loads � Constant Power or Linear Torque � Hyperbolic Torque � Impact Loads (non-defined torque) Variable Torque

I.e. 80% speed = 51% power (P2) or 50% speed = 12.5% power(P3)

Centrifugal Pumps - VSD to Throttling power comparison

35

40

45

54

73

100

8084

8892

96100

0

10

20

30

40

50

60

70

80

90

100

110

50 60 70 80 90 100

Flow (%)

Po

we

r (%

)

Below 50% flow the power absorbed difference

remains approximately constant.

Fans - VSD to damper power comparison

35

40

45

54

73

100

70.573.4

78.6

84.5

91.5

100

0

10

20

30

40

50

60

70

80

90

100

110

50 60 70 80 90 100

Flow (%)

Po

we

r (%

)

Below 50% flow the power absorbed difference

remains approximately constant.



4

Operation of a Centrifugal Fan

Constant Torque

Conveyers Cranes



5

Constant Power - Linear Torque

Calender

Sugar Mill



6

Hyperbolic Torque Constant Power

Machine Tool Constant Power

Center Driven Winder



7

Hyperbolic Torque Winder Non-defined Torque

T

n



8

Torque Power Curve

Understanding the Volts / Hertz ratio

� When the VSD changes the frequency it controls the voltage simultaneously to

keep V/F ratio constant

� Because the V/F ratio remains constant, T ∞ I

� Current normally determined by the load

� Flux is controlled by the VSD

Motor Theory of Operation



9

Induction Motor Operation Electric motors are literally the driving force behind all automation systems used in the industry, commerce and buildings Motors consume about 45% of all electrical energy produced in the world (56% SA) About three quarters of application like power pumps, fans and compressors make use of AC motors, particular squirrel cage motors To regulate the amount of energy consumed by motors we must make used of VSD’s

Basic AC Motor Construction

AC motor Hardware and Operation



10

Resulting Field and Motor Rotation

AC Motor hardware and operation

The rotor and stator magnetic fields are attracted to one another and cause the rotor to follow the stator’s electromagnetic field;

Important: The poles of an AC motor are stationary. It is the magnetic field generated by the poles which actually rotates.

Drive End



11

The rotor voltage UR is a proportional, function of slip s.

Motor speed – Torque curve & VSD operation

Motor speed can be changed by changing The number of poles

Motor Efficiency (P = Pfe + Pj +Pmec) Thermal Classes: F = 155°C and H = 180°C (Ambient = 40°C) t = 80k / °C



12

VSD Theory of Operation

Power Section of a VSD

1. Half controlled bridge rectifier for sizes F and G;

2. Dynamic Braking standard for sizes A to D;

3. RFI filter standard for sizes E, F and G;

Wide operating temperature range w/o derating: -10…50ºC (D), -10…45ºC (sizes E, F and G), and -10…40ºC (720A).



13

VSD - Pre Charge

Inrush Current

� It lasts for a few milliseconds only. � The system will force a very high current which in general is 1.5 to 3.0 times

higher than the starting current, which is average 6 x In for Induction Motors.



14

Harmonic Mitigation

Harmonic producing equipment – VSD’s – Electronic Ballasts – UPS

Filters for Mitigating Harmonics

Built-in DC link inductors symmetrically connected in the +/- of the DC link

� Built in DC chokes have technical value

a) Give a similar result to a 2% AC line reactor

b) Do not cause a volt drop ( as an AC reactor does )

� Input reactors are also useful to reduce the effect of dips, sags, swells, transients

and other line side disturbances

U V W

L1

L2

R

S

T

M 3~



15

Line Reactor versus DC Reactor

Input Reactor = DC Reactor (Harmonic Reduction)

Harmonic Spectrum Analysis



16

IGBT Switching

The reduction of the switching frequency reduces effects related to motor instability, which occur in specific application conditions. It also reduces the earth leakage current, being able to avoid the actuation of the faults F074 (Ground Fault) or F070 (Output Overcurrent/Short Circuit).



17

VSD – IGBT Switching (Motoring)

Braking / Stopping the Motor When stopping (braking) a motor the kinetic energy must go somewhere. In this case the power flows from the motor into the VSD. As a result the DC bus voltage inside the inverter may climb to excessive levels. - Low inertia load – VSD can handle it. The VSD have the ability to dissipate some power in the form of heat. ≈30% - High inertia load – VSD needs something or somewhere to dump the excessive energy.



18

If the DC bus voltage goes too high, the inverter will protect itself by tripping on an over voltage fault.

Dynamic Braking This type of braking is used in cases where short deceleration times are desired or when high inertia loads are driven.

The solution is to install a braking resistor in the circuit where the regenerative energy from the load is dissipated as heat across a resistor bank. When the voltage on the DC bus reach the set value in parameter P0153 (depends on P296 setting), the brake chopper is activated and the “excess energy” is then dissipated via the braking resistor as heat.



19

Optimal Braking

For the deceleration of high inertia loads with short deceleration times, the CFW-11 has available the DC Link Regulation function, which avoids the tripping of the inverter by overvoltage in the DC link (F022).

This function can be used in vector control: allows the controlled braking of the motor, eliminating the additional braking resistors in some applications (P0184).

The braking torque that can be obtained from the frequency inverter without braking resistors varies from 10 % to 35 % of the motor rated torque.

Only activated on sensorless or with Encoder mode and motor rated power is < 55 kW. Regenerative braking

In this configuration the drive, instead of dissipating the excess energy via a resistor bank, it puts it back into the grid.

To be able to do that, the rectifier diodes are replaced by IGBT’s. the rectifier will be actuating as an inverter.



20

Control Section



21

Types of control P202 V/f: scalar control; It is the simplest control mode, by imposed voltage/frequency; with an open loop speed regulation or with slip compensation (programmable); it allows multimotor operation, but it is not well suited for higher dynamic performance, very low speeds, or applications that require direct control of motor torque. Torque response time 0.3 Sec. Speed variation range: (20:1)

VVW: Voltage Vector WEG;

It allows a static speed control more accurate than the V/f mode; it adjusts itself automatically to the line variations, and also to the load variations.

The VVW control uses the stator current measurement, the stator resistance value and the induction motor nameplate data to perform automatically the torque estimation, the output voltage compensation and consequently the slip compensation, replacing the function of the parameters P0137 and P0138.(Automatic Torque boost and Slip compensation). Better speed regulation with higher torque capability at low speeds (frequencies below 5 Hz)

Sensorless Vector:

The separation of the motor current into two components: Flux and Torque producing current Iq and Id (Iq oriented and Id perpendicular with the motor electromagnetic flux vector). The Iq current is directly related to the torque produced at the motor shaft. The motor flux and torque can be independently controlled with the Id and Iq currents respectively.

The SV Control is recommended for the majority of the applications, because it allows the operation in a speed variation range of 1:100, accuracy in the speed control of 0.5 % of the rated speed, high starting torque and fast dynamic response.

Another advantage of SV is the greater robustness against sudden line voltage and load changes, avoiding unnecessary over current trips.

Vector Control Principle



22

Vector control block diagram

Torque producing current Iq (perpendicular to the motor Flux vector) Flux producing current Id (oriented with the motor electromagnetic flux)

Vector with Encoder:

It is a field oriented control; it needs motor encoder and inverter encoder interface module (ENC1 or ENC2); speed control down to 0 rpm; speed control static precision of 0.01 % of the rated speed; high static and dynamic performance of the speed and

torque control.



23

Speed Variation Rates

Permanent Magnet Synchronous Motors High efficiency Reactive power (kVAr) is not required Constant speed under load variation

Sensorless Vector for PMSM motor: Without speed sensor at the motor; Speed control range 1:100. Vector with Encoder for PMSM motor: It requires an incremental encoder at the motor and the encoder interface module (ENC1, ENC2 or PLC11) at the inverter.



24

PWM resulting current 1.25 – 10kHz switching (P297 = 5 kHz)

VSD Identification

T

1 >1 >1 >1 >

1) Ref A: 5 A 5 ms

T1 >1 >1 >1 >

1) Ref A: 200 Volt 2 ms



25

What Questions to ask When Selecting a VSD

� What is the supply voltage?

� What is the motor voltage?

� What is the type of application?

� Number of Digital Inputs required?

� Number of Relay Outputs required?

� Is an Analogue Input / Output required or not?

� Should the Analogue Input / Output be 4-20mA or 0-10V?

� What is the motor cable length?

� Is there one or more motors connected to one VSD?

� Maximum and Minimum Speed required for operation?



26

ZEST Software Tools

VSD Motor Selection

Sizing the Drive to a Motor The correct way to select a VSD is matching its output current with the motor rated current.



27

Application

ND = Normal Duty (Variable torque) or HD = Heavy Duty (Constant torque)



28

Motor Speed-Torque Curve & VSD Operating Area

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

1.1

0 10 20 30 40 50 60 70Hz

To

rqu

e (

Nm

)

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

1.1

0 10 20 30 40 50 60 70Hz

PO

WE

R (

KW

)

VSD Characteristics Torque vs Frequency

VSD Characteristics Power vs Frequency



29

VSD Selection Motor de-rating Curve

Effect of Pulley/Gear Ratios

Motor speed – torque curve & VSD operation

Power - kW Speed - RPM Torque - Nm Power - kW Speed - RPM Torque - Nm

100 1500 637 1 1 100 1500 637

100 1500 637 10 1 100 150 6367

100 1500 637 1 10 100 15000 64

100 1500 637 1 1 95 1500 605

100 1500 637 10 1 95 150 6048

100 1500 637 1 10 95 15000 60

INPUT OUTPUT

EFFECT OF PULLEY/GEAR RATIOS

RATIO



30

Summary

� A VSD produces a pulsed voltage that in turn produces a near sinusoidal

waveform.

� A VSD maintains constant / optimal motor flux.

� Torque is proportional to current

� Motor control is always on the low slip “straight line” part of the motor curve.

Reasons for Reduction in Torque

1. At all speeds : Additional heating due to harmonics.

2. <50Hz : Reduction in cooling airflow.

3. >50Hz : Field weakening due to reduced flux

Installation and Connections Temperature:

� Sizes A to D: -10ºC to 50ºC; Sizes F to G: -10ºC to 45ºC; 720A model: -10ºC to 40ºC

� Up to 60ºC with 2% current derating for each ºC above the maximum temperature; � Relative Air Humidity: 5% to 90%, non-condensing;

� Condensation must not cause accumulated residues to become conductive.

(material remaining after a distillation or an evaporation)

� Maximum Altitude: 1000m – nominal conditions;

� From 1000m to 4000m – with 1% current reduction for each 100m above the 1000m;

Avoid:

� Direct exposure to sunlight, rain, high moisture and sea air;

� Exposure to inflammable or corrosive gases or liquids;

� Excessive vibration;

� Dust, oil or any conductive particles or materials in the air.



31

Mechanical Installation

� From Sizes A to E the inverter area that will be outside the panel has IP 54 protection � For Sizes F and G the inverter area that will be outside the panel has only IP20

protection degree.



32

IP Rating and implications IP Rating refers to the degree of protection. The first numeral refers to protection against solids. The second numeral refers to protection against liquids. IP21 is suitable for a clean substation. IP42 is suitable for a dusty substation. IP54 provides dust and liquid protection. IP65 is totally sealed. IP43 is the best practical degree of protection without going to great expense and technical difficulty. IP Rating may not be dependant on the use of filters



33

CFW-11 IP54 Drive

Electrical Installation



34

Electrical Installation

Motor Circuit Breaker Fuse Drive

Thermal protection (Overload Protection) Short circuit protection Overload Protection

Magnetic protection (Short circuit protection)

Switching Frequency

For the shield to act as protective earth, it must have at least 50% of the phase conductors conductivity.



35

Proper Grounding

Long Cables



36

Cable Charging Current

VSD - Filters

Cable with a single ground conductor, which is Cable with three ground conductors, which is

recommended for drives up to and including 150 kW recommended for drives larger than 150 kW

Output

Reactor



37

EMC Compliance Installation

Electrical – Power Connections

Electrical I/O Connections � 6 x digital inputs 24 Vdc, opto-coupled, bidirectional

� 3 x relay outputs with REV contacts, 240 Vac / 1 A

� 1 differential 12 bits analog inputs (0-10 V, 4-20 mA)

� 1 differential 11 bits + signal analog input (0-10 V, 4-20 mA)

� 2 x 11-bit isolated analog outputs (0-10 V, 4-20 mA)



38

Electrical I/O Connections

Analog I/Os AI signal selection



39

Electrical I/O Connections

CFW-11: Specific

1.1 to 2.2 kW - 200-240 V ac - Single-phase

1.1 to 55 kW - 200-240 V ac - Three-phase






40

The CFW11 HMI (Keypad)

� Commands can be executed

� Values can be displayed

� Inverter parameter can be set



41

The CFW11 HMI (Keypad)

Monitoring parameters : Motor speed in rpm;

Motor current in Amps;

Output frequency in Hz.

P0205, P0206 and P0207: selection of the parameters

that will be showed in the monitoring mode.

P0208 to P0212: engineering unit for speed indication

In order to configure the monitoring mode as Bar graph, access parameters

P0205, P0206 and/or P0207 and select the options that end with the sign – (values

range from 11 to 20).

The CFW11 HMI Monitoring Modes



42

The CFW11 HMI Programming Modes

Parameter Groups Structure

Level 0



43

New Read Only Parameters

P0000 – Password setting

P0027 Accessories Config. 1

P0028 Accessories Config. 2

P0029 Power Hardware Config

P0030 IGBTs Temperature U

P0031 IGBTs Temperature V

P0032 IGBTs Temperature W

P0033 Rectifier Temperature

P0034 Internal Air Temp.

P0036 Fan Heatsink Speed

P0037 Motor Overload Status

P0038 Encoder Speed

P0040 PID Process Variable

P0041 PID Setpoint Value

P0045 Fan Enabled Time

P0048 Present Alarm

P0049 Present Fault

Fault history

Fault nr.

DD/ MM

Year

Hour

P0050

to

P0089

From the last

10 faults

P0090 Current At Last Fault

P0091 DC Link At Last Fault

P0092 Speed At Last Fault

P0093 Reference Last Fault

P0094 Frequency Last Fault

P0095 Motor Volt.Last Fault

P0096 DIx Status Last Fault

P0097 DOx Status Last Fault



44

ND/HD Ratings – NEW CONCEPT

Normal overload rating (ND): “Normal Duty”

Defines the maximum current for continuous operation

(Inom-ND) and an overload of 110% during 1 minute.

Applications that do not require higher torques, regarding the nominal torque.

Heavy overload rating (HD): “Heavy Duty”

Defines the maximum current for continuous operation

(Inom-HD) and an overload of 150% during 1 minute.

Applications with high overload toque, regarding the nominal torque.

Normal Duty: Inominal-ND continuous

1.1 x Inominal-ND @ 60s @ 50ºC (size E: 45ºC)

1.5 x Inominal-ND @ 3s @ 50ºC (size E: 45ºC) Heavy Duty: Inominal-HD continuous

1.5 x Inominal-HD @ 60s @ 50ºC (size E: 45ºC)

2.0 x Inominal-HD @ 3s @ 50ºC (size E: 45ºC)

Currents for ND and HD



45

ND Ratings HD Ratings

Real Time Clock – Fault and Alarm

Date and time – Real time clock

P0051 Day/Month

P0052 Year

P0053 Time

P0055 Day/Month

P0056 Year

P0057 Time

P0059 Day/Month

P0060 Year

P0061 Time

P0063 Day/Month

P0064 Year

P0065 Time

P0067 Day/Month

P0068 Year

P0069 Time

P0071 Day/Month

P0072 Year

P0073 Time

P0075 Day/Month

P0076 Year

P0077 Time

P0079 Day/Month

P0080 Year

P0081 Time

P0083 Day/Month

P0084 Year

P0085 Time

P0087 Day/Month

P0088 Year

P0089 Time

P0082 Ninth Fault

P0086 Tenth Fault

P0074 Seventh Fault

P0078 Eighth Fault

P0066 Fifth Fault

P0070 Sixth Fault

P0058 Third Fault

P0062 Fourth Fault

P0050 Last Fault

P0054 Second Fault

� The Fault and Alarm record indicates date

and hour of the occurrence.

� It makes it easier the detection of drive

faults because it is possible to monitor the

state of the inverter, its setpoint, I/Os, etc

at the moment of the failure.



46

Date and time – Real time clock

Keypad battery

The battery located in the HMI is used for keeping the real time clock working while the

inverter is not powered.

Installation:

The HMI can be installed or removed from the inverter even when it is powered.

The battery is necessary only for functions related to the clock. In the event of

discharged or not installed battery, the time in the clock will be incorrect and the A181

(clock with invalid value) message will be shown on the display every time the inverter is

powered up

Battery access cover



47

1 st Ramp: P0100 and P0101 – Acceleration and Deceleration time

2 nd Ramp: P0102 and P0103 – Acceleration and Deceleration time 2

P0105 – 1st/2nd Ramp Selection

P0120 – Speed reference backup

P0133 – Minimum speed

P0134 – Maximum speed



48

P0204 – Load/Save parameters



49

Digital Input Functions (P163 – P168)

Digital Output Functions(P175 – PP177)



50

Analog Input Functions (P231 – P236)

Analog Output Functions (P251 – P254)



51

Local and Remote definition

Thermal Management (P352)

� Automatic on/off control of the heatsink fan

� Fan speed sensor (parameter for speed indication, speed alarm)

� Fan enabled time parameter (alarm for predictive maintenance)

� Fans easily detachable for cleaning and replacement

� Parameter indications of heatsink and internal temperatures



52

USB Connection

USB connection, in Windows environment, for programming, command and

monitoring CFW-11 inverters.

� Use always a “standard host/device shielded USB” cable. Cables without shield

may cause communication errors.

� The USB connection is electrically isolated from the mains and from other internal

inverter high voltages. However, it is not isolated from the protection earth (PE).

For the connection to the USB, use an isolated laptop or a desktop connected to

the same PE than the inverter.

MMF - Flash Memory Module P318

Functions:

� Stores the inverter parameters;

� Allows transferring parameters stored in the FLASH memory module to the

inverter and vice-versa;

� Allows transferring firmware stored in the FLASH memory module to the inverter

and vice-versa;

� Stores the program generated by the Soft PLC. Every time the inverter is

powered up, it transfers this program to the RAM located on the control board,

where it is executed.

� Storage capacity 15 Kb



53

VSD Programming



54

Initial Power Up

1. Measure and check that the supply voltage is acceptable for VSD supply range

2. Power up the VSD

3. Check that the power up was successful.

4. If no Errors/Alarms proceed to Exercise 1

Exercise 1

Load 50Hz (Factory Default) (Access to Parameters;P0000 = 5)

1. Press Menu, scroll down to Backup Parameters[G06], Press Select (x2) (P204), scroll up to option 6, and Enter. Screen will revert back to Main Menu (Enter Password; P0000 = 5; if ask and repeat Step 1) When P0204 = 5 or 6, the parameters P0295 (Rated current), P0296 (Rated voltage), P0297 (Switching frequency), P0308 (Serial address), P0352 (Fan configuration) and P0201 (Language), are not changed by the factory settings.

2. Press Menu and scroll to Oriented start-up [G02] and Select (x2)

3. Select option 1=YES : The following parameters are set:

4. P201 – Language

5. P202 – Type of control

6. P296 – Line Rated Voltage (Supply voltage)

7. P298 – Application (ND/HD)

8. P398 – Motor Service Factor

9. P400 – Motor Rated Voltage

10. P401 – Motor Rated Current

11. P402 – Motor Rated Speed - RPM

12. P403 – Motor Rated Frequency - Hz

13. P404 – Motor Rated Power - kW

14. P405 – Encoder Pulses number

15. P406 – Motor ventilation

16. It will revert back to P201 - Language, press Reset (Drive will Reboot)

Password parameter settings

To change the password from 5 to any other number

P200 =2 (Change Password), Change it now to your new code and Save.

Your new password has successfully been entered



55

Exercise 2

Basic Application Level 1 [G04]

1. Press Menu, scroll down to Basic Application [G04], and Select.

2. Set P100 – Acceleration time, to 3s

3. Set P101 – Deceleration time, to 2s

4. Set P133 – Min Speed, to 120 RPM

5. Set P134 – Max Speed, to 3000 RPM

6. Set P135 – Max Output Current (1.5 x Inom HD for VSD) 7. Set P136 – Manual Torque Boost (1) 8. Press Return x2

Exercise 3

Saving The Parameter Settings: (Backup Parameters)

1. Press Menu scroll to Group 06 Select; into P204 Select again

2. Scroll to option 10 = Save user 1, Press Save and then Return x2.

(There are three memory areas, User 1 ; 2 and 3)

3. Test the drive by pressing Remote on keypad, start via Dig in-1 and change

direction via Dig in-2. Speed-Reference can be change with Analog in 1

Information - P202 Options

P202 – Operation mode selection (Type of control )

8 Different Mode settings including;

1) V/F 50Hz - default setting for the SA - market

3) Sensorless Vector

4) Vector with encoder

� V/F 50Hz is sufficient for most applications and is the recommended mode for

standard applications (ND) like centrifugal pumps and fans.

� Vector provides more accurate control and quicker torque response and is

recommended for demanding applications (HD).



56

Exercise 4

Program the Drive for Sensorless Vector:

1. Press Menu, select PARAMETER GROUPS; scroll to Vector Control; Select

Speed Regulator; Type of Control; Select Choose option 3 – Sensorless

Vector; Save and Confirm P296; P298; P398; P400; P401; P402; P403; P404;

P406; P408

2. The final step of this routine is P408 – Self tuning

3. P408 – Self-tuning – the purpose of this is to measure certain motor values

(P409 = Stator “R”; P410 = I magnetizing; P411 = Leakage Induction; P412 =

Rotor time constant and P413 = mechanical time constant) to enable the more

accurate sensorless vector control.

4. Set P408 = 1 (No rotation) If the motor shaft is connected to the load.

(Wait for Ready on keypad)

Other options

P408 = 2 (Run for Imr) (motor magnetizing current) is the most accurate method.

This method only works if the motor has nothing connected on it’s shaft. P408 = 3

is the same as option 1 & 4, in other words for vector with encoder if load cannot

be taken off shaft

P408 = 4 is for vector with encoder, it does a run for load inertia, (P413) so use it

when load has been connected after option 2.

Exercise 5

Save the settings

1. Go to BACKUP PARAMETERS; Press Select X 2 P204 = 11. This will save the

vector setup to memory User 2. Press Return x2

2. Press Menu; scroll to I/O CONFIGURATION; Select; Digital Inputs. Set P265 =

2, this will make Dig In-3 the on/off switch which will switch the magnetizing

current off and disconnect the IGBT’s from the motor. Feel on flywheel for

difference.

3. Start and Test the VSD by switching Dig In-3 ON and OFF.

Info: We can easily upload V/F (P204 = 7) OR Sensorless Vector (P204 = 8) Using User 1,2 or 3, we can easily go back to working settings if someone made changes that cause the drive to behave unpredictably.



57

Exercise 6

Magnetizing flux parameter settings:

1. Change P265 back to option “0; not used “(Factory setting)

2. Set P217 = 1; Zero Speed Disable: (This will switch-off the magnetizing current in Sensorless Vector mode when the motor has reach almost zero speed, which depends on P291)

3. Set P291= 200 rpm (Factory setting 15 rpm)

You can set at what speed the magnetizing current must be switched off.

Do not Save

Exercise 7

Dynamic braking parameter settings

Making use of external braking resistor

1. Load User 1; V/F Control (Backup)

2. Set P154 (G28) to braking resistor ohm value (52 Ω for training bench)

3. Set P155 (G28) to braking resistor power rating (0.3Kw) Otherwise the braking resistor will not be protected

4. Set P151 (G27) = 800V and P153 (G28) = 675V (V/F mode)

5. Speed to 1500 RPM and press stop. (Monitor)

Do not Save

Exercise 8

Optimal braking parameter settings (Only available in Vector mode)

1. Load User 2; Sensorless Vector Control (P204 = 8)

2. Set P185 = 675V [G96]

3. Set P184 = 0 (“with losses”) Optimal braking on (P184 = 1 then normal braking)

4. Speed up to 1500 RPM ; Stop to Test. (Strange noise indicates correct working)

(P404 must be < 55Kw)

Do not Save



58

Exercise 9

Multispeed parameter settings

1. Load User 1; V/F settings P204 = 7

2. Set P221 = 8 (Local Command; Local Reference Sel (Multispeed)

You will get Program Dix = Multispeed displayed until a Digital Input have been

set [G07 or G40]=Digital Inputs)

3. Set P266 = 13 (2 speeds) ; P267 = 13 (4 speeds) ; P268 = 13 (8 speeds)

4. Start the Drive on keypad

5. Use DI4, 5, 6 to change speed settings (look at table below)

Regulation Parameters: P124 to P131 – Multispeed

To change these speed settings, change P124 – P131

Do not Save

8 Speeds

4 Speeds

2 Speeds

Speed Ref DI4 DI5 DI6

P124 0 0 0

P125 1 0 0

P126 0 1 0

P127 1 1 0

P128 0 0 1

P129 1 0 1

P130 0 1 1

P131 1 1 1



59

Exercise 10

Electronic Potentiometer parameter settings

Electronic Potentiometer use a NO and NC button/switch to change speed similar to the

up and down button on the keypad


2. Set P221 = 7 [G31] = Local Command; Local Reference Sel

You will get Program DIx = Increase EP until the Digital Inputs have been set

[G40] = (Digital Inputs)

3. Set P266 = 0 (not used)

4. Set P267 = 11 (EP Increased)

5. Set P268 = 12 (EP Decreased)

6. Close Digital Input 6 and Quickly close and open Input 5 to speed up, monitor

speed, then quickly open and close Input 6 to speed down

Exercise 11

Stop Mode Parameter Settings:


2. Start and Stop the drive (When you stop the drive, it ramps down according to

deceleration time P101)

3. Set P229 = 1 (for applications requiring coasting after a stop command)

4. Start and run motor up to 1500 RPM. Stop and monitor how motor coast to stop.

N.B: Do not start again while the motor still turns. This will cause the motor to immediately start from 0 speed and ramp up to reference speed.

The solution follows with exercise 12

Exercise 12

Flying Start Parameter Settings:

To continue with motor still spinning enable flying start;

1. Set P320 = 1 (Zero Speed Logic [G35] and press start while motor shaft still

spins, and monitor. (This action only aloud without encoder)



60

Exercise 13

Ride Through Parameter Settings:

Ride Through allows the drive to continue working in the event of a “power

dip” (Prevent F021 “DC Bus Under Voltage tripping”) The drive will survive

on energy that it takes out of the motor, (regen) so the time that the drive

can ride through depends on the motor/load inertia.

1. Continue with previous exercise settings

2. Start the drive, speed up to 1500 RPM

3. Switch the power off for 2 sec and back on. (F021 DC Bus Under voltage error)

4. Clear Fault, set P320 = 2; FlyStart/ RideThru [G44]

5. Repeat step 2 and 3. No error

6. Load User 2; Sensorless Vector Control (P204 = 8)

7. Set P320 = 2; FlyStart/ RideThru [G44]

8. Start the drive, speed up to 1500 RPM, switch the power off and monitor how

long it take to “Ride Through” compare to V/F Mode previously.

Exercise 14

Analog Output-1 Meter Calibration:


2. Put Drive in Remote mode

3. Using Analog input 1 Speed motor up to 1500 rpm and monitor RPM on the

keypad

4. Confirm P251 = 2 (Analog output 1 = Real Speed)

5. Adjust P252 (Gain) while monitoring the meter needle. Fine tune to give the

same RPM reading as on the keypad



61

Exercise 15

Speed Indication Parameter Settings

To change the speed indication in P001/P002 to something more useful like m/s:

1. Press Menu; Select Parameter Group, Enter select G30

2. Change the r,p & m in P209,P210 & P211 respectively to m, /, s

(choose the correct ascii character)

3. Now change the scaling factor in P208 (@base speed = 1500 RPM) for

example, belt speed 1,56 m/s; enter 156.

4. Insert the decimal point in the right position by setting P212 to: 3

Options available

0 = wxyz (no decimal point) 1 = wxy.z 2 = wx.yz 3 = w.xyz

6. Start Drive and test at different speeds

CFW11 Training Sep 3 2015 - Zest WEG · PDF fileRevision Performed by Summary Date 00 Andre vd...

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