Danfoss VLT series Leitfaden

Contents

1. How to Read this Design Guide

How to Read this Design Guide 5

Approvals 5

Symbols 6

Abbreviations 6

Definitions 7

2. Introduction to VLT HVAC Drive

Disposal Instruction 13

Software Version 13

CE labelling 14

Air humidity 15

Aggressive Environments 15

Vibration and shock 16

VLT HVAC Controls 28

PID 30

General aspects of EMC 41

Galvanic isolation (PELV) 44

Earth leakage current 45

Control with brake function 45

Mechanical brake control 47

Extreme running conditions 47

3. VLT HVAC Selection

Electrical Data 49

General Specifications 54

Peak Voltage on Motor 60

Efficiency 61

Peak Voltage on Motor 62

Special Conditions 63

Purpose of derating 63

Automatic adaptations to ensure performance 65

Mechanical Dimension 66

Options and Accessories 68

4. How to Order

Ordering form 79

Type Code String 80

Ordering Numbers 81

VLT®HVAC Drive Design Guide Contents

MG.11.B2.02 - VLT®is a registered Danfoss trademark 1

5. How to Install

Mechanical Installation 83

Accessory Bag 83

Electrical Installation 85

Removal of Knockouts for Extra Cables 85

Access to Control Terminals 93

Electrical Installation, Control Terminals 94

Final Set-Up and Test 97

Additional Connections 99

Installation of misc. connections 103

Safety 106

EMC-correct Installation 106

Mains supply interference/Harmonics 110

Residual Current Device 110

6. Application Examples

111

7. RS-485 Installation and Set-up

121

RS-485 Installation and Set-up 121

FC Protocol Overview 124

Network Configuration 124

FC Protocol Message Framing Structure 126

Examples 133

Modbus RTU Overview 133

VLT HVAC with Modbus RTU 135

Modbus RTU Message Framing Structure 135

How to Access Parameters 139

Examples 140

Danfoss FC Control Profile 146

8. Troubleshooting

153

Status messages 153

Alarms and warnings 153

Index

160

Contents VLT®HVAC Drive Design Guide

2MG.11.B2.02 - VLT®is a registered Danfoss trademark

Contents | Illustration

Illustration 2.1: 36

Illustration 2.2: Galvanic isolation 44

Illustration 3.1: Derating of I 63

Illustration 3.2: Derating of I 63

Illustration 3.3: Derating of I 63

Illustration 3.4: Derating of I 63

Illustration 3.5: Derating of I 64

Illustration 3.6: Derating of I 64

Illustration 3.7: Derating of I 64

Illustration 3.8: Derating of I 64

Illustration 3.9: Derating of output current versus altitude at T 64

Illustration 3.10: Principle Diagram 69

Illustration 3.11: Connection to 24 V back-up supplier (A2-A3). 73

Illustration 3.12: Connection to 24 V back-up supplier (A5-C2). 73

Illustration 3.13: Principle diagram for Analog I/O mounted in frequency converter. 74

Illustration 5.1: How to connect to mains and earthing (A2 and A3 enclosure). 86

Illustration 5.2: How to connect to mains and earthing (A5 enclosure). 86

Illustration 5.3: How to connect to mains and earthing (B1 and B2 enclosure). 86

Illustration 5.4: How to connect to mains and earthing (C1 and C2 enclosure). 86

Illustration 5.5: Terminals for mains and earthing. 87

Illustration 5.6: How to connect to mains and earthing with disconnector (A5 enclosure).

Illustration 5.7: 88

Illustration 5.8: Motor connection for enclosures A2 and A3 88

Illustration 5.9: Motor connection for 88

Illustration 5.10: Motor connection for enclosure B1 and B2 89

Illustration 5.11: Motor connection for enclosure C1 and C2 89

Illustration 5.12: A1, A2 and A3 enclosures 93

Illustration 5.13: A5, B1, B2, C1 and C2 enclosures 93

Illustration 5.14: Control terminals (all enclosures) 93

Illustration 5.15: Terminal 37 available with Safe Stop Function only! 94

Illustration 5.16: Terminal 37: Safe Stop input available with Safe Stop Function only! 95

Illustration 5.17: Terminals for relay connection 100

Illustration 5.18: USB connection. 104

Illustration 5.19: EMC-correct electrical installation of an IP20 frequency converter. 107

Illustration 6.1: Terminal 37: Available only with Safe Stop Function! 111

Illustration 6.2: Terminal 37: Available only with Safe Stop Function! 111

Illustration 7.1: Network Terminal Connection 122

VLT®HVAC Drive Design Guide Contents

MG.11.B2.02 - VLT®is a registered Danfoss trademark 3

Contents | Table

Table 2.1: EMC Test Results (Emission, Immunity) 42

Table 2.2: Immunity 43

Table 4.1: Type code description. 80

Table 5.1: Tightening of terminals. 85

Table 5.2: Non UL fuses 200 V to 500 V 91

Table 5.3: UL fuses 200 - 240 V 92

Table 5.4: UL fuses 380 - 600 V 92

Table 8.1: Alarm/Warning code list 154

Table 8.2: Description of Alarm Word, Warning Word and Extended Status Word 155

Contents VLT®HVAC Drive Design Guide

4MG.11.B2.02 - VLT®is a registered Danfoss trademark

1. How to Read this Design Guide

This Design Guide will introduce all aspects of your VLT HVAC Drive.

Available literature for VLT HVAC Drive

-The VLT

HVAC Drive Operating Instructions MG.11.AX.YY provide the neccessary in-

formation for getting the drive up and running.

-The VLT

HVAC Drive Design Guide MG.11.BX.YY entails all technical information about

the drive and customer design and applications.

-The VLT

HVAC Drive Programming Guide MG.11.CX.YY provides information on how to

programme and includes complete parameter descriptions.

X = Revision number

YY = Language code

Danfoss Drives technical literature is also available online at www.danfoss.com/BusinessAreas/

DrivesSolutions/Documentations/Technical+Documentation.

1.1.1. Approvals

VLT®HVAC Drive Design Guide 1. How to Read this Design Guide

MG.11.B2.02 - VLT®is a registered Danfoss trademark 5

1.1.2. Symbols

Symbols used in this Design Guide.

NB!

Indicates something to be noted by the reader.

Indicates a general warning.

Indicates a high-voltage warning.

*Indicates default setting

1.1.3. Abbreviations

Alternating current AC

American wire gauge AWG

Ampere/AMP A

Automatic Motor Adaptation AMA

Current limit ILIM

Degrees Celcius °C

Direct current DC

Drive Dependent D-TYPE

Electro Magnetic Compatibility EMC

Electronic Thermal Relay ETR

Frequency Converter FC

Gram g

Hertz Hz

Kilohertz kHz

Local Control Panel LCP

Meter m

Milli Henry Inductance mH

Milliampere mA

Millisecond ms

Minute min

Motion Control Tool MCT

Nanofarad nF

Newton Meters Nm

Nominal motor current IM,N

Nominal motor frequency fM,N

Nominal motor power PM,N

Nominal motor voltage UM,N

Parameter par.

Protective Extra Low Voltage PELV

Printed Circuit Board PCB

Rated Inverter Output Current IINV

Revolutions Per Minute RPM

Second s

Torque limit TLIM

Volts V

1. How to Read this Design Guide VLT®HVAC Drive Design Guide

6MG.11.B2.02 - VLT®is a registered Danfoss trademark

1.1.4. Definitions

Drive:

VLT,MAX

The maximum output current.

VLT,N

The rated output current supplied by the frequency converter.

VLT, MAX

The maximum output voltage.

Input:

Control command

You can start and stop the connected motor by

means of LCP and the digital inputs.

Functions are divided into two groups.

Functions in group 1 have higher priority than

functions in group 2.

Group 1 Reset, Coasting stop, Reset and Coasting

stop, Quick-stop, DC braking, Stop and the

"Off" key.

Group 2 Start, Pulse start, Reversing, Start reversing,

Jog and Freeze output

Motor:

JOG

The motor frequency when the jog function is activated (via digital terminals).

The motor frequency.

MAX

The maximum motor frequency.

MIN

The minimum motor frequency.

M,N

The rated motor frequency (nameplate data).

The motor current.

M,N

The rated motor current (nameplate data).

M,N

The rated motor speed (nameplate data).

M,N

The rated motor power (nameplate data).

VLT®HVAC Drive Design Guide 1. How to Read this Design Guide

MG.11.B2.02 - VLT®is a registered Danfoss trademark 7

M,N

The rated torque (motor).

The instantaneous motor voltage.

M,N

The rated motor voltage (nameplate data).

Break-away torque

VLT

The efficiency of the frequency converter is defined as the ratio between the power output and

the power input.

Start-disable command

A stop command belonging to the group 1 control commands - see this group.

Stop command

See Control commands.

References:

Analog Reference

A signal transmitted to the analog inputs 53 or

54, can be voltage or current.

Bus Reference

A signal transmitted to the serial communica-

tion port (FC port).

Preset Reference

A defined preset reference to be set from -100% to +100% of the reference range. Selection of

eight preset references via the digital terminals.

Pulse Reference

A pulse frequency signal transmitted to the digital inputs (terminal 29 or 33).

Ref

MAX

Determines the relationship between the reference input at 100% full scale value (typically 10 V,

20mA) and the resulting reference. The maximum reference value set in par. 3-03.

Ref

MIN

Determines the relationship between the reference input at 0% value (typically 0V, 0mA, 4mA)

and the resulting reference. The minimum reference value set in par. 3-02.

1. How to Read this Design Guide VLT®HVAC Drive Design Guide

8MG.11.B2.02 - VLT®is a registered Danfoss trademark

Miscellaneous:

Analog Inputs

The analog inputs are used for controlling various functions of the frequency converter.

There are two types of analog inputs:

Current input, 0-20 mA and 4-20 mA

Voltage input, 0-10 V DC.

Analog Outputs

The analog outputs can supply a signal of 0-20 mA, 4-20 mA, or a digital signal.

Automatic Motor Adaptation, AMA

AMA algorithm determines the electrical parameters for the connected motor at standstill.

Brake Resistor

The brake resistor is a module capable of absorbing the brake power generated in regenerative

braking. This regenerative braking power increases the intermediate circuit voltage and a brake

chopper ensures that the power is transmitted to the brake resistor.

CT Characteristics

Constant torque characteristics used for screw and scroll refrigeration compressors.

Digital Inputs

The digital inputs can be used for controlling various functions of the frequency converter.

Digital Outputs

The drive features two Solid State outputs that can supply a 24 V DC (max. 40 mA) signal.

DSP

Digital Signal Processor.

Relay Outputs:

The frequency converter drive features two programmable Relay Outputs.

ETR

Electronic Thermal Relay is a thermal load calculation based on present load and time. Its purpose

is to estimate the motor temperature.

GLCP:

Graphical Local Control Panel (LCP102)

Initialising

If initialising is carried out (par. 14-22), the programmable parameters of the frequency converter

return to their default settings.

Intermittent Duty Cycle

An intermittent duty rating refers to a sequence of duty cycles. Each cycle consists of an on-load

and an off-load period. The operation can be either periodic duty or none-periodic duty.

VLT®HVAC Drive Design Guide 1. How to Read this Design Guide

MG.11.B2.02 - VLT®is a registered Danfoss trademark 9

LCP

The Local Control Panel (LCP) makes up a complete interface for control and programming of the

frequency converter. The control panel is detachable and can be installed up to 3 metres from the

frequency converter, i.e. in a front panel by means of the installation kit option.

The Local Control Panel is available in two versions:

-Numerical LCP101 (NLCP)

-Graphical LCP102 (GLCP)

lsb

Least significant bit.

MCM

Short for Mille Circular Mil, an American measuring unit for cable cross-section. 1 MCM 0.5067≡

msb

Most significant bit.

NLCP

Numerical Local Control Panel LCP101

On-line/Off-line Parameters

Changes to on-line parameters are activated immediately after the data value is changed. Changes

to off-line parameters are not activated until you enter [OK] on the LCP.

PID Controller

The PID controller maintains the desired speed, pressure, temperature, etc. by adjusting the out-

put frequency to match the varying load.

RCD

Residual Current Device.

Set-up

You can save parameter settings in four Set-ups. Change between the four parameter Set-ups

and edit one Set-up, while another Set-up is active.

SFAVM

Switching pattern called S tator F lux oriented A synchronous V ector M odulation (par. 14-00).

Slip Compensation

The frequency converter compensates for the motor slip by giving the frequency a supplement

that follows the measured motor load keeping the motor speed almost constant..

Smart Logic Control (SLC)

The SLC is a sequence of user defined actions executed when the associated user defined events

are evaluated as true by the SLC.

Thermistor:

A temperature-dependent resistor placed where the temperature is to be monitored (frequency

converter or motor).

1. How to Read this Design Guide VLT®HVAC Drive Design Guide

10 MG.11.B2.02 - VLT®is a registered Danfoss trademark

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