ABB ACS255 drives Users Manual

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Page 1

ABB Micro drives

User’s manual

ACS255 drives (0.5…20 hp) (600V Variants)

Page 2

List of related manuals

Option manuals and guides

Code (English)

ACS255 user’s manual for 115-480V variants

3AXD10000528266

Page 3

ACS255 drives

0.5…20 hp

User’s manual

3AXD10000528265 Rev A

EFFECTIVE: 2016-09-13

Page 4

1. Table of Contents

ACS255 – IP20 (600V Variants) EASY START-UP GUIDE ________________________________________ 7 ACS255 – IP66 (600V Variants) EASY START-UP GUIDE ________________________________________ 8

2. Safety ____________________________________________________________________________ 10

What this chapter contains _____________________________________________________________________ 10

Use of warnings ______________________________________________________________________________ 10

Safety in installation and maintenance ____________________________________________________________ 10

Safety in start-up and operation _________________________________________________________________ 11

3. General Information and Ratings ______________________________________________________ 13

3.1. Type designation key ___________________________________________________________________ 13

3.2. Drive model numbers – IP20 _____________________________________________________________ 14

3.3. Drive model numbers – IP66 _____________________________________________________________ 14

4. Mechanical Installation______________________________________________________________ 15

4.1. General ______________________________________________________________________________ 15

4.2. Before Installation _____________________________________________________________________ 15

4.3. UL Compliant Installation ________________________________________________________________ 15

4.4. Mechanical dimensions and weights _______________________________________________________ 15

4.5. Guidelines for Enclosure mounting (IP20 Units) ______________________________________________ 17

4.6. Mounting the Drive – IP20 Units __________________________________________________________ 17

4.7. Guidelines for mounting (IP66 Units) _______________________________________________________ 18

4.8. Removing the Terminal Cover ____________________________________________________________ 18

4.9. Routine Maintenance ___________________________________________________________________ 18

5. Electrical Installation ________________________________________________________________ 19

5.1. Grounding the Drive ____________________________________________________________________ 19

5.2. Wiring Precautions _____________________________________________________________________ 20

5.3. Incoming Power Connection ______________________________________________________________ 20

5.4. Compatibility with IT (ungrounded) and corner-grounded TN systems ____________________________ 21

5.5. Drive and Motor Connection _____________________________________________________________ 22

5.6. Motor Terminal Box Connections __________________________________________________________ 22

___________________________________________________________________________________________ 22

5.7. Motor Thermal overload Protection. _______________________________________________________ 22

5.8. Control Terminal Wiring _________________________________________________________________ 22

5.9. Connection Diagram ____________________________________________________________________ 23

5.10. Safe Torque Off ________________________________________________________________________ 24

6. Managing the Keypad _______________________________________________________________ 28

6.1. Keypad Layout and Function _____________________________________________________________ 28

6.2. Changing Parameters ___________________________________________________________________ 28

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6.3. Resetting Parameters to Factory Default Settings _____________________________________________ 29

6.4. Advanced Keypad Operation ShortCuts _____________________________________________________ 30

6.5. Drive Operating Displays ________________________________________________________________ 30

7. Quick Start-up and Control ___________________________________________________________ 31

7.1. Quick Start-up Terminal Control __________________________________________________________ 31

7.2. Quick Start-up Keypad Control ____________________________________________________________ 31

7.3. Sensorless Vector Speed Control Mode _____________________________________________________ 32

8. Application Macros _________________________________________________________________ 33

8.1. Overview of macros ____________________________________________________________________ 33

8.2. Macro wiring configurations. _____________________________________________________________ 34

9. Parameters _______________________________________________________________________ 38

9.1. Parameter Structure ____________________________________________________________________ 38

9.2. Parameters in the Short parameter mode ___________________________________________________ 39

9.3. Read Only Status parameters _____________________________________________________________ 41

9.4. Parameters in the Long parameter mode ___________________________________________________ 43

9.5. Preventing un-authorized parameter editing. ________________________________________________ 54

10. Serial communications ______________________________________________________________ 55

10.1. RJ45 Connector Pin Assignment ___________________________________________________________ 55

10.2. Modbus RTU Communications ____________________________________________________________ 55

11. Technical Data _____________________________________________________________________ 59

11.1. Environmental _________________________________________________________________________ 59

11.2. Input/Output Current ratings and fuses ____________________________________________________ 59

11.3. Overload _____________________________________________________________________________ 59

11.4. Additional Information for UL Approved Installations _________________________________________ 60

11.5. Derating Information ___________________________________________________________________ 60

12. Appendix: Permanent magnet synchronous motors (PMSMs) _______________________________ 61

13. Troubleshooting ___________________________________________________________________ 62

13.1. Fault messages ________________________________________________________________________ 62

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ACS255 – IP20 (600V Variants) EASY START-UP GUIDE

Fuses or MCB

1 9 12 13

P20 Easy Start

AC Supply Connection Supply Voltage

3 Phase : Connect L1 L2 L3, PE 500-600 Volts + / - 10%

Fuses Fuse rating recommendation values given on page 59

Help Card

Display

Keypad Operation can be found in section 6 and 7.2

IMPORTANT!

HARDWARE ENABLE FUNCTION

Run – Stop 10K Speed Pot

Link the terminals as shown, optionally through switch contacts, to enable the drive.

Control Terminals

Based on the factory default parameter settings

Close the switch to run (enable), open to stop

Motor Cable

o Cable size recommendation values given on page 59. o Observe the maximum permissible motor cable length o For Motor cable lengths > 50 metres, an output filter is

recommended

o Use a screened (shielded cable)

Motor Connection

Check for Star or Delta Connection according to the motor voltage rating

(See page 22)

Enter the Motor Nameplate Data into the drive Parameters as follows

o Motor Rated Voltage : 9905 o Motor Rated Current : 9906 o Motor Rated Frequency : 9907 o Motor Rated Speed (Optional) : 9908

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1 9 12 13

Fuse rating recommendation values given on page 59

AC Supply Connection

500 – 600 Volts + / - 10%

ACS255 – IP66 (600V Variants) EASY START-UP GUIDE

Display

Keypad Operation can be found In Section 6 and 7.2.

IMPORTANT

HARDWARE ENABLE

Link the terminals as shown Above, optionally through switch

contacts to enable the drive

Control Terminals

Run / Stop 10K Pot Close the switch to run (enable) Open the switch to stop

Motor Cable

Cable size recommendation values given

on page 59.

Observe the maximum permissible motor

cable length For Motor cable lengths > 50 metres, an output filter is recommended Use a screened (shielded) cable. The shield should be bonded to earth at both ends

Motor Connection

Check for Star or Delta Connection according

to the motor voltage rating (See page 22).

Enter the Motor Nameplate Data into the

drive Parameters as follows Motor Rated Voltage : 9905

Motor Rated Current : 9906

Motor Rated Frequency : 9907

Motor Rated Speed (Optional) : 9908

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Declaration of Conformity:

EN 61800-5-1: 2007

Adjustable speed electrical power drive systems. Safety requirements. Electrical, thermal and energy.

EN 61800-3 2nd Ed: 2004 / A1:2012

Adjustable speed electrical power drive systems. EMC requirements and specific test methods

EN 55011: 2007

Limits and Methods of measurement of radio disturbance characteristics of industrial, scientific and medical (ISM) radio-frequency equipment (EMC)

EN60529 : 1992

Specifications for degrees of protection provided by enclosures

Standard

Classification

Independent Approval

EN 61800-5-2:2007

Type 2

*TUV

EN ISO 13849-1:2006

PL “d”

EN 61508 (Part 1 to 7)

SIL 2

EN60204-1

Uncontrolled Stop “Category 0”

EN 62061

SIL CL 2

Drive Type / Rating

EMC Category – Conducted Emissions

First Environment Category C1

First Environment Category C2

Second Environment Category C3

ACS255..

Use additional External EMC Filter

Note

Compliance with EMC standards is dependent on a number of factors including the environment in which the drive is installed, motor switching frequency, motor, cable lengths and installation methods adopted.

For motor cable lengths greater than 100m, an output dv / dt filter must be used, please refer to the (please refer to the http://www.abb.com/ProductGuide/ for further details).

Vector Speed and Torque control modes may not operate correctly with long motor cables and output filters. It is recommended to operate in V/F mode only for cable lengths exceeding 50m.

ABB Drives Ltd hereby states that the ACS255 product range conforms to the relevant safety provisions of the following council directives:

2014/30/EU (EMC) and 2014/35/EU (LVD) 2011/65/EU (RoHS)

STO Function

ACS255 incorporates a hardware STO (Safe Torque Off) Function, designed in accordance with the standards listed below.

*Note : TUV Approval of the “STO” function is relevant for drives which have a TUV logo applied on the drive rating label.

Electromagnetic Compatibility

It is the responsibility of the installer to ensure that the equipment or system into which the product is incorporated complies with the EMC legislation of the country of use. Within the European Union, equipment into which this product is incorporated must comply with the EMC Directive 2004/108/EC. When using an ACS255 with an internal or optional external filter, compliance with the following EMC Categories, as defined by EN61800-3:2004 can be achieved:

All rights reserved. No part of this User Guide may be reproduced or transmitted in any form or by any means, electrical or mechanical including photocopying, recording or by any information storage or retrieval system without permission in writing from the publisher.

The manufacturer accepts no liability for any damage caused during or resulting from transport, receipt of delivery, installation or commissioning. The manufacturer also accepts no liability for damage or consequences resulting from inappropriate, negligent or incorrect installation, incorrect adjustment of the operating parameters of the drive, incorrect matching of the drive to the motor, incorrect installation, unacceptable dust, moisture, corrosive substances, excessive vibration or ambient temperatures outside of the design specification.

Contents of this User Guide are believed to be correct at the time of printing. In the interest of a commitment to a policy of continuous improvement, the manufacturer reserves the right to change the specification of the product or its performance or the contents of the User Guide without notice.

This User Guide is for use with version 2.0 Firmware.

User Guide Revision A

This user guide is the “original instructions” document. All non-English versions are translations of the “original instructions”.

The manufacturer adopts a policy of continuous improvement and while every effort has been made to provide accurate and up to date information, the information contained in this User Guide should be used for guidance purposes only and does not form the part of any contract.

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Electricity warning warns of hazards from electricity which can cause physical injury and/or damage to the equipment.

General warning warns about conditions, other than those caused by electricity, which can result in physical injury and/or damage to the equipment.

WARNING! Ignoring the instructions can cause physical injury or death, or damage to the equipment.

Only qualified electricians are allowed to install and maintain the drive!

2. Safety

What this chapter contains

This chapter contains the safety instructions which you must follow when installing, operating and servicing the drive. If ignored, physical injury or death may follow, or damage may occur to the drive, motor or driven equipment. Read the safety instructions before you work on the unit.

Use of warnings

Warnings caution you about conditions which can result in serious injury or death and/or damage to the equipment and advice on how to avoid the danger. The following warning symbols are used in this manual:

Safety in installation and maintenance

These warnings are intended for all who work on the drive, motor cable or motor.

Electricity safety

 Never work on the drive, motor cable or motor when input power is applied. After disconnecting the input power, always

wait for 10 minutes to let the intermediate circuit capacitors discharge before you start working on the drive, motor or motor cable.

Always ensure by measuring with a multimeter (impedance at least 1 Mohm) that:

1. There is no voltage between the drive input phases L1, L2 and L3 and the ground.

2. There is no voltage between terminals + and BR and the ground.

 Do not work on the control cables when power is applied to the drive or to the external control circuits. Externally supplied

control circuits may carry dangerous voltage even when the input power of the drive is switched off.

 Do not make any insulation or voltage withstand tests on the drive.

 Be sure the system is properly grounded before applying power. Do not apply AC power before you ensure that all grounding

instructions have been followed. Electrical shock can cause serious or fatal injury

Note:

Even when the motor is stopped, dangerous voltage is present at the power circuit terminals L1, L2, L3 and U, V, W and + and BR.

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General safety

WARNING! Ignoring the following instructions can cause physical injury or death, or damage to the equipment.

 The drive is not field repairable. Never attempt to repair a malfunctioning drive; contact your local ABB representative or

Authorized Service Centre for replacement.

 Make sure that dust from drilling does not enter the drive during the installation. Electrically conductive dust inside the drive may

cause damage or lead to malfunction.

 Ensure sufficient cooling.

Safety in start-up and operation

These warnings are intended for all who plan the operation, start up or operate the drive.

WARNING! Ignoring the following instructions can cause physical injury or death, or damage to the equipment.

 Before adjusting the drive and putting it into service, make sure that the motor and all driven equipment are suitable for

operation throughout the speed range provided by the drive. The drive can be adjusted to operate the motor at speeds above and below the speed provided by connecting the motor directly to the power line.

 Do not activate automatic fault reset functions if dangerous situations can occur. When activated, these functions reset the

drive and resume operation after a fault.

 Do not control the motor with an AC contactor or disconnecting device (disconnecting means); use instead the control panel

start and stop keys and or external commands (I/O). The maximum allowed number of charging cycles of the DC capacitors (that is, power-ups by applying power) is two per minute.

Note:

 When parameter 1103 PRIMARY COMMAND SOURCE MODE is not set to 1 or 2, the stop key on the control panel will not

stop the drive. To stop the drive open terminal 2 of the drive control terminals.

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Danger : Indicates a risk of electric shock, which, if not avoided, could result in damage to the equipment and possible injury or death.

Danger : Indicates a potentially hazardous situation other than electrical, which if not avoided, could result in damage to property.

This ACS255 variable speed drive is intended for professional installation and commissioning into complete equipment or systems as part of a fixed installation. If installed incorrectly it may present a safety hazard. The ACS255 uses high voltages and currents, carries a high level of stored electrical energy, and is used to control mechanical plant that may cause injury. Close attention is required to system design and electrical installation to avoid hazards in either normal operation or in the event of equipment malfunction. Only qualified electricians are allowed to install and maintain this product.

System design, installation, commissioning and maintenance must be carried out only by personnel who have the necessary training and experience. They must carefully read this safety information and the instructions in this Guide and follow all information regarding transport, storage, installation and use of the ACS255, including the specified environmental limitations.

Do not perform any flash test or voltage withstand test on the ACS255. Any electrical measurements required should be carried out with the ACS255 disconnected.

Electric shock hazard! Disconnect and ISOLATE the ACS255 before attempting any work on it. High voltages are present at the terminals and within the drive for up to 10 minutes after disconnection of the electrical supply. Always ensure by using a suitable multimeter that no voltage is present on any drive power terminals prior to commencing any work.

Where supply to the drive is through a plug and socket connector, do not disconnect until 10 minutes have elapsed after turning off the supply.

Ensure correct grounding connections and cable selection as per defined by local legislation or codes. The drive may have a leakage current of greater than 3.5mA; furthermore the earth cable must be sufficient to carry the maximum supply fault current which normally will be limited by the fuses. Suitably rated fuses should be fitted in the mains supply to the drive, according to any local legislation or codes.

Do not carry out any work on the drive control cables when power is applied to the drive or to the external control circuits.

The “Safe Torque Off” Function does not prevent high voltages from being present at the drives power terminals.

Within the European Union, all machinery in which this product is used must comply with the Machinery Directive 2006/42/EC, Safety of Machinery. In particular, the machine manufacturer is responsible for providing a main switch and ensuring the electrical equipment complies with EN60204-1.

The level of integrity offered by the ACS255 control input functions – for example stop/start, forward/reverse and maximum speed, is 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.

The driven motor can start at power up if the enable input signal is present.

The STOP function does not remove potentially lethal high voltages. ISOLATE the drive and wait 10 minutes before starting any work on it. Never carry out any work on the Drive, Motor or Motor cable when the input power is still applied.

The ACS255 can be programmed to operate the driven motor at speeds above or below the speed achieved when connecting the motor directly to the mains supply. Obtain confirmation from the manufacturers of the motor and the driven machine about suitability for operation over the intended speed range prior to machine start up.

Do not activate the automatic fault reset function on any systems whereby this may cause a potentially dangerous situation.

IP66 drives provide their own pollution degree 2 environments. IP20 drives must be installed in a pollution degree 2 environment, mounted in a cabinet with IP54 or better.

ACS255s are intended for indoor use only.

When mounting the drive, ensure that sufficient cooling is provided. Do not carry out drilling operations with the drive in place, dust and metal shavings from drilling may lead to damage.

The entry of conductive or flammable foreign bodies should be prevented. Flammable material should not be placed close to the drive

Relative humidity must be less than 95% (non-condensing).

Ensure that the supply voltage, frequency and number of phases correspond to the rating of the ACS255 as delivered.

Never connect the mains power supply to the Output terminals U, V, W.

Do not install any type of automatic switchgear between the drive and the motor

Wherever control cabling is close to power cabling, maintain a minimum separation of 4in. (100 mm) and arrange crossings at 90 degrees Ensure that all terminals are tightened to the appropriate torque setting

Do not attempt to carry out any repair of the ACS255. In the case of suspected fault or malfunction, contact your local ABB Drives representative for further assistance.

Please read the IMPORTANT SAFETY INFORMATION below, and all Warning and Caution information elsewhere.

Page 12

3. General Information and Ratings

This chapter contains information about the ACS255 including how to identify the drive.

3.1. Type designation key

The type designation contains information on the specification and configuration of the drive. You find the type designation label attached to the drive. The first digits from the left express the basic configuration, for example ACS255-03U-02A1-6. The explanations of the type designation label selections are described below. ACS255-03 U-02A1-6+B063+F278

ACS255 product series

1-phase/3 phase

03 = 3-phase input

EMC Filter

E = Filtered U = Non-Filtered

Output Current Rating

In format xxAy, where xx indicates the integer part and y the fractional part, For example, 02A1 means 2.1 A.

Input Voltage Range

6 = 500…600VAC

IP66 Enclosure

Input switch assembly (Speed potentiometer, run/stop and mains disconnect switch)

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Model Number

Power

(HP)

Output Current

(A)

Input switch

assembly

Internal DB transistor

Frame Size

ACS255-03U-02A1-6

2.1

Yes

ACS255-03U-03A1-6

3.1

Yes

ACS255-03U-04A1-6

4.1

Yes

ACS255-03U-06A5-6

6.5

Yes

ACS255-03U-09A0-6

7.5 9 No

Yes

ACS255-03U-12A0-6

Yes

ACS255-03U-17A0-6

Yes

ACS255-03U-22A0-6

Yes

Model Number

Power

(HP)

Output Current

(A)

Input switch

assembly

Internal DB transistor

Frame Size

ACS255-03U-02A1-6 +B063

2.1

Yes

ACS255-03U-03A1-6 +B063

3.1

Yes

ACS255-03U-04A1-6 +B063

4.1

Yes

ACS255-03U-06A5-6 +B063

6.5

Yes

ACS255-03U-09A0-6 +B063

7.5 9 No

Yes

ACS255-03U-12A0-6 +B063

Yes

ACS255-03U-17A0-6 +B063

Yes

ACS255-03U-02A1-6 +B063 +F278

2.1

Yes

ACS255-03U-03A1-6 +B063 +F278

3.1

Yes

ACS255-03U-04A1-6 +B063 +F278

4.1

Yes

ACS255-03U-06A5-6 +B063 +F278

6.5

Yes

ACS255-03U-09A0-6 +B063 +F278

7.5

Yes

ACS255-03U-12A0-6 +B063 +F278

Yes

ACS255-03U-17A0-6 +B063 +F278

Yes

3.2. Drive model numbers – IP20

Mechanical Dimensions and Mounting information is shown from page 15. Electrical Specifications are shown on page 59.

3.3. Drive model numbers – IP66

Mechanical Dimensions and Mounting information is shown from page 15. Electrical Specifications are shown on page 59.

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4. Mechanical Installation

Drive

Size

A B C D E F G H I J Weight

221

8.70

207

8.15

137

5.39

209

8.23

5.3

0.21

185

7.28

112

4.41

2.48

5.5

0.22

0.39

1.8

261

10.28

246

9.69 - -

247

9.72 6 0.24

205

8.07

131

5.16

3.15

5.5

0.22

0.39

3.5

7.7

4.1. General

 The ACS255 should be mounted in a vertical position only, on a flat, flame resistant, vibration free mounting using the integral

mounting holes or DIN Rail clip (Size P2 only).

 The ACS255 must be installed in a pollution degree 1 or 2 environment only.  Do not mount flammable material close to the ACS255  Ensure that the minimum cooling air gaps, as detailed in section 4.5 and 4.7 are left clear.  Ensure that the ambient temperature range does not exceed the permissible limits for the ACS255 are given on page 60.  Provide suitable clean, moisture and contaminant free cooling air sufficient to fulfil the cooling requirements of the ACS255.

4.2. Before Installation

 Carefully Unpack the ACS255 and check for any signs of damage. Notify the shipper immediately if any exist.  Check the drive rating label to ensure it is of the correct type and power requirements for the application.  To prevent accidental damage always store the ACS255 in its original box until required. Storage should be clean and dry and within

the temperature range –40°C to +60°C.

4.3. UL Compliant Installation

Note the following for UL-compliant installation:

 For an up to date list of UL compliant products, please refer to UL listing NMMS.E211945.  The drive can be operated within an ambient temperature range as stated in section 11.1.  For IP20 units, installation is required in a pollution degree 1 environment.  For IP66 units, installation in a pollution degree 2 environment is permissible.  UL Listed ring terminals / lugs must be used for all bus bar and grounding connections.

4.4. Mechanical dimensions and weights

4.4.1. IP20 Units

Mounting Bolts

All Frame Sizes : 4 x M4

Tightening Torques

Recommended Control Terminal Torque Settings : All Sizes : 0.8 Nm (7 lb-in) Recommended Power Terminal Torque Settings : All Sizes : 1 Nm (8.85 lb-in)

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Drive

Size

A B D F G H I J Weight

257

10.12

220

8.66

200

7.87

239

9.41

188

7.40

176

6.93

4.2

0.17

8.5

0.33

4.8

10.6

310

12.20

277

10.89

252

9.90

251

9.88

211

8.29

198

7.78

4.2

0.17

8.5

0.33

7.3

16.1

4.4.2. IP66 Units

Mounting Bolt Sizes

All Frame Sizes 4 x M4

Tightening Torques

Recommended Control Terminal Torque Settings :All Sizes : 0.8 Nm (7 lb-in) Recommended Power Terminal Torque Settings : Frame Size 2 : 1.2 – 1.5 Nm (10 – 15 lb-in)

Page 16

4.5. Guidelines for Enclosure mounting (IP20 Units)

Drive

Frame

Size

Above &

Below

Either

Side

Between

2.95

1.97

1.81

100

3.94

1.97

2.05

Note :

Dimension Z assumes that the drives are mounted sideby-side with no clearance.

Typical drive heat losses are 3% of operating load conditions.

Above are guidelines only and the operating ambient temperature of the drive MUST be maintained at all times.

 IP20 drives must be installed in a pollution degree 2 environment, mounted in a cabinet with IP54 or better.  Installation should be in a suitable enclosure, according to EN60529 or other relevant local codes or standards.  Enclosures should be made from a thermally conductive material.  Where vented enclosures are used, there should be free space clearance above and below the drive to ensure good air circulation –

see the diagram below for minimum free space clearance. Air should be drawn in below the drive and expelled above the drive.

 In any environments where the conditions require it, the enclosure must be designed to protect the ACS255 against ingress of airborne

dust, corrosive gases or liquids, conductive contaminants (such as condensation, carbon dust, and metallic particles) and sprays or splashing water from all directions.

 High moisture, salt or chemical content environments should use a suitably sealed (non-vented) enclosure.

The enclosure design and layout should ensure that the adequate ventilation paths and clearances are left to allow air to circulate through the drive heatsink. Recommend below is the minimum mounting clearance requirements for drives mounted in non-ventilated metallic enclosures.

4.6. Mounting the Drive – IP20 Units

 IP20 Units are intended for installation within a control cabinet.  When mounting with screws

o Using the drive as a template, or the dimensions shown above, mark the locations for drilling o Ensure that when mounting locations are drilled, the dust from drilling does not enter the drive o Mount the drive to the cabinet backplate using suitable M4 mounting screws o Position the drive, and tighten the mounting screws securely

 When Din Rail Mounting (Frame Size 2 Only)

o Locate the DIN rail mounting slot on the rear of the drive onto the top of the DIN rail first o Press the bottom of the drive onto the DIN rail until the lower clip attaches to the DIN rail o If necessary, use a suitable flat blade screw driver to pull the DIN rail clip down to allow the drive to mount securely on the

rail

o To remove the drive from the DIN rail, use a suitable flat blade screwdriver to pull the release tab downwards, and lift the

bottom of the drive away from the rail first

Page 17

Drive

Frame

Size

Above &

Below

Either

Side

200

7.87

0.39

200

7.87

0.39

Note :

Typical drive heat losses are approximately 3% of operating load conditions.

Above are guidelines only and the operating ambient temperature of the drive MUST be maintained at all times.

Cable Gland Sizes

Drive

Frame

Size

Power

Cable

Motor

Cable

Control

Cables

M25

(PG21)

M25

(PG21)

M20

(PG13.5)

M25

(PG21)

M25

(PG21)

M20

(PG13.5)

Frame Sizes 2 & 3

Using a suitable flat blade screwdriver, rotate the two retaining screws indicated until the screw slot is vertical.

4.7. Guidelines for mounting (IP66 Units)

 Before mounting the drive, ensure that the chosen location meets the environmental condition requirements for the drive shown in

section 11.1.

 The drive must be mounted vertically, on a suitable flat surface  The minimum mounting clearances as shown in the table below must be observed  The mounting site and chosen mountings should be sufficient to support the weight of the drives

 Using the drive as a template, or the dimensions shown above, mark the locations required for drilling  Suitable cable glands to maintain the ingress protection of the drive are required.  Gland holes for power and motor cables are pre-moulded into the drive enclosure, recommended gland sizes are shown above, gland

holes for control cables may be cut as required.

4.8. Removing the Terminal Cover

4.9. Routine Maintenance

The drive should be included within the scheduled maintenance program so that the installation maintains a suitable operating environment, this should include:

 Ambient temperature is at or below that set out in the “Environment” section on page 59.  Heat sink fans freely rotating and dust free.  The Enclosure in which the drive is installed should be free from dust and condensation; furthermore ventilation fans and air filters

should be checked for correct air flow.

Checks should also be made on all electrical connections, ensuring screw terminals are correctly torqued; and that power cables have no signs of

heat damage.

Page 18

5. Electrical Installation

This manual is intended as a guide for proper installation. ABB Drives Ltd cannot assume responsibility for the compliance or the non-compliance to any code, national, local or otherwise, for the proper installation of this drive or associated equipment. A hazard of personal injury and/or equipment damage exists if codes are ignored during installation.

This ACS255 contains high voltage capacitors that take time to discharge after removal of the main supply. Before working on the drive, ensure isolation of the main supply from line inputs. Wait ten (10) minutes for the capacitors to discharge to safe voltage levels. Failure to observe this precaution could result in severe bodily injury or loss of life.

Only qualified electrical personnel familiar with the construction and operation of this equipment and the hazards involved should install, adjust, operate, or service this equipment. Read and understand this manual and other applicable manuals in their entirety before proceeding. Failure to observe this precaution could result in severe bodily injury or loss of life.

Whenever possible use Shielded motor cablesmaintaining shield as far as possible along the cable.

=/>100mm

 Twisted-Pair shielded cables for analog control and motor

feedback signals.

 Ensure Filter chassis is making metal-metal contact with

Mounting panel.

RFI Filter

Option

Site Ground Bus-Bar bonded to Metal Back-Panel

panel which is bonded to main power ground.

Metal Back-Panel

U V W

360° bonding

EMC cable gland

(Best-Practice)

(Shield to Motor

Chassis)

 Avoid long parallel

runs of motor cables with other cables

 Where control cables must cross power

cables make sure they are as near to 90 degrees as possible.

5.1. Grounding the Drive

5.1.1. Recommended installation for EMC compliance.

Page 19

5.1.2. Grounding Guidelines

The ground terminal of each ACS255 should be individually connected DIRECTLY to the site ground bus bar (through the filter if installed). The ACS255 ground connections should not loop from one drive to another, or to, or from any other equipment. Ground loop impedance must confirm to local industrial safety regulations. To meet UL regulations, UL approved ring crimp terminals should be used for all ground wiring connections. The drive Safety Ground must be connected to system ground. Ground impedance must conform to the requirements of national and local industrial safety regulations and/or electrical codes. The integrity of all ground connections should be checked periodically.

5.1.3. Protective Earth Conductor

The Cross sectional area of the PE Conductor must be at least equal to that of the incoming supply conductor.

5.1.4. Safety Ground

This is the safety ground for the drive that is required by code. One of these points must be connected to adjacent building steel (girder, joist), a floor ground rod, or bus bar. Grounding points must comply with national and local industrial safety regulations and/or electrical codes.

5.1.5. Motor Ground

The motor ground must be connected to one of the ground terminals on the drive.

5.1.6. Ground Fault Monitoring

As with all inverters, a leakage current to earth can exist. The ACS255 is designed to produce the minimum possible leakage current while complying with worldwide standards. The level of current is affected by motor cable length and type, the effective switching frequency, the earth connections used and the type of RFI filter installed. If a GFCI (Ground Fault Current Interrupter) is to be used, the following conditions apply:

 The device must be suitable for protecting equipment with a DC component in the leakage current  Individual GFCI’s should be used for each ACS255

5.1.7. Shield Termination (Cable Screen)

The safety ground terminal provides a grounding point for the motor cable shield. The motor cable shield connected to this terminal (drive end) should also be connected to the motor frame (motor end). Use a shield terminating or EMI clamp to connect the shield to the safety ground terminal.

5.2. Wiring Precautions

Connect the ACS255 according to section 5.9, ensuring that motor terminal box connections are correct. There are two connections in general: Star and Delta. It is essential to ensure that the motor is connected in accordance with the voltage at which it will be operated. For more information, refer to section 5.6 Motor Terminal Box Connections.

Type MC continuous corrugated aluminium armour cable with symmetrical grounds or shielded power cable is recommended for the motor cables if metallic conduit is not used.

The power cables must be rated for 75 °C (167 °F).

5.3. Incoming Power Connection

 Power should be connected to L1, L2, and L3. Phase sequence is not important.  For compliance with CE and C Tick EMC requirements, a symmetrical shielded cable is recommended.  For compliance with CSA requirements, transient surge suppression shall be installed on the line side of this equipment and shall be

rated 600V (phase to ground), 600V (phase to phase), suitable for overvoltage category III, and shall provide protection for a rated impulse withstand voltage peak of 4 kV or equivalent.

 A fixed installation is required according to IEC61800-5-1 with a suitable disconnecting device installed between the ACS255 and the AC

Power Source. The disconnecting device must conform to the local safety code / regulations (e.g. within Europe, EN60204-1, Safety of machinery).

 The cables should be dimensioned according to any local codes or regulations. Guideline dimensions are given in section 11.2.  Suitable fuses to provide wiring protection of the input power cable should be installed in the incoming supply line, according to the

data in section 11.2. The fuses must comply with any local codes or regulations in place. In general, type gG (IEC 60269) or UL type T fuses are suitable; however in some cases type aR fuses may be required. The operating time of the fuses must be below 0.5 seconds.

 When the power supply is removed from the drive, a minimum of 30 seconds should be allowed before re-applying the power. A

minimum of 5 minutes should be allowed before removing the terminal covers or connection.

 The maximum permissible short circuit current at the ACS255 Power terminals as defined in IEC60439-1 is 100kA.  An optional Input Choke is recommended to be installed in the supply line for drives where any of the following conditions occur:-

o The incoming supply impedance is low or the fault level / short circuit current is high. o If the transformer kVA rating is more than 10x the kVA rating of the drive or ensure that the per drive source

impedance is less than 0.5%

o The supply is prone to dips or brown outs o An imbalance exists on the supply (3 phase drives) o The power supply to the drive is via a busbar and brush gear system (typically overhead Cranes).

 In all other installations, an input choke is recommended to ensure protection of the drive against power supply faults.

Page 20

5.4. Compatibility with IT (ungrounded) and corner-grounded TN systems

WARNING! EMC filters should not be used when installing the drive on an IT system (an ungrounded

power system or high-resistance-grounded power system, otherwise the system will be connected to ground potential through the EMC capacitors. This may cause danger or damage to the EMC filter.

If you have an IT (ungrounded) system or corner-grounded TN system, disconnect the internal Varistor screw as shown below.

Page 21

Additional Information

 Compatible Thermistor : PTC Type, 2.5kΩ trip level Use a setting of

parameter 9902 DIGITAL INPUTS FUNCTION SELECT that has Input 5 (terminal 10) function as External Trip, e.g. 9902 = 6. Refer to section 8.1 for further details.

5.5. Drive and Motor Connection

 The drive inherently produces fast switching of the output voltage (PWM) to the motor compared to the mains supply, for motors

which have been wound for operation with a variable speed drive then there is no preventative measures required, however if the quality of insulation is unknown then the motor manufacturer should be consulted and preventative measures may be required.

 The motor should be connected to the ACS255 U, V, and W terminals using a suitable 3 or 4 core cable. Where a 3 core cable is utilised,

with the shield operating as an earth conductor, the shield must have a cross sectional area at least equal to the phase conductors when they are made from the same material. Where a 4 core cable is utilised, the earth conductor must be of at least equal cross sectional area and manufactured from the same material as the phase conductors.

 The motor earth must be connected to one of the ACS255 earth terminals.  For compliance with the European EMC directive, a suitable screened (shielded) cable should be used. Braided or twisted type

screened cable where the screen covers at least 85% of the cable surface area, designed with low impedance to HF signals are recommended as a minimum. Installation within a suitable steel or copper tube is generally also acceptable.

 The cable screen should be terminated at the motor end using an EMC type gland allowing connection to the motor body through the

largest possible surface area

 Where drives are mounted in a steel control panel enclosure, the cable screen may be terminated directly to the control panel using a

suitable EMC clamp or gland, as close to the drive as possible.

 For IP66 drives, connect the motor cable screen to the internal ground clamp

5.6. Motor Terminal Box Connections

Most general purpose motors are wound for operation on dual voltage supplies. This is indicated on the nameplate of the motor

This operational voltage is normally selected when installing the motor by selecting either STAR or DELTA connection. STAR always gives the higher of the two voltage ratings. . Example Motor nameplate shown below (380V Delta illustrated):

5.7. Motor Thermal overload Protection.

5.7.1. Internal Thermal overload protection.

The drive has an in-built motor thermal overload function; this is in the form of an “F0009” trip after delivering >100% of the value set in parameter 9906 MOTOR RATED CURRENT for a sustained period of time (e.g. 150% for 60 seconds).

5.7.2. Motor Thermistor Connection

Where a motor thermistor is to be used, it should be connected as follows :-

5.8. Control Terminal Wiring

 All analog signal cables should be suitably shielded. Twisted pair cables are recommended.  Power and Control Signal cables should be routed separately where possible, and must not be routed parallel to each other.  Signal levels of different voltages e.g. 24 Volt DC and 600 Volt AC, should not be routed in the same cable.  Maximum control terminal tightening torque is 0.5Nm.  Control Cable entry conductor size: 0.05 – 2.5mm2 / 30 – 12 AWG.

Page 22

5.9. Connection Diagram

5.9.1. Power Terminal Designations

Incoming Power Source

Connect to L1, L2 & L3 terminals. Phase sequence is not important.

Motor Connections

Connect the motor to the U, V & W terminals. The motor earth must be connected to the drive

Optional Brake Resistor & DC Bus Connections

Where a Brake resistor is used, it must be connected to the “BR” and

“+” terminals.

Protective Earth / Ground connection. The drive must be Earthed / Grounded

5.9.2. Control Terminal Connections & Factory Settings

Open

Closed

+24V Supply (100mA) / External Input

+24V 1

Digital Input 1

Stop

Run (Enable)

DI1 2

Digital Input 2

Forward Rotation

Reverse Rotation

DI2 3

Digital Input 3

Analog Speed Ref

Preset Speed

DI3 4

Digital Inputs : 8 – 30 Volt DC + 10 Volt, 10mA Output

+10V 5

Analog Input 1

DI/AI4 6

0V 7 0V

Output Speed Analog Output : 0 – 10 Volt / 4-20mA, 20mA Max

8 AO1

0 Volt Supply / External Input

0V 9 0V

Output Current

Analog Input 2

DI/AI5

Analog Output : 0 – 10 Volt / 4-20mA, 20mA Max

AO2

SAFE TORQUE OFF Input Also refer to page 24 for further information on the STO Function.

Logic High = 18-30 Volt DC (“SAFE TORQUE OFF” Standby mode)

STO+

STO-

Relay Contacts (Terminals 14-18) 250VAC / 30VDC 5A Maximum

R01COM

Default Function : Drive Ready / Fault

R01NO

R01NC

R02NO

Default Function : Running

R02COM

The brake resistor should be protected from overheating by means of a thermal switch which interrupts the mains supply in a brake

Page 23

SIL

(Safety Integrity Level)

PFH

(Probability of dangerous Failures per Hour)

SFF

(Safe failure fraction %)

Lifetime assumed

EN 61800-5-2

1.23E-09 1/h (0.12 % of SIL 2)

20 Yrs

(Performance level)

CCF (%)

(Common Cause Failure)

EN ISO 13849-1

PL d

SILCL

EN 62061

SILCL 2

5.10. Safe Torque Off

Safe Torque OFF will be referred to as “STO” through the remainder of this section.

5.10.1. Responsibilities

The overall system designer is responsible for defining the requirements of the overall “Safety Control System” within which the drive will be incorporated; furthermore the system designer is responsible for ensuring that the complete system is risk assessed and that the “Safety control System” requirements have been entirely met and that the function is fully verified, this must include confirmation testing of the “STO” function before drive commissioning.

The system designer shall determine the possible risks and hazards within the system by carrying out a thorough risk and hazard analysis, the outcome of the analysis should provide an estimate of the possible hazards, furthermore determine the risk levels and identify any needs for risk reduction. The “STO” function should be evaluated to ensure it can sufficiently meet the risk level required.

5.10.2. What STO Provides

The purpose of the “STO“ function is to provide a method of preventing the drive from creating torque in the motor in the absence of the “STO“ input signals (Terminal 12 with respect to Terminal 13), this allows the drive to be incorporated into a complete safety control system where

“STO“ requirements need to be fulfilled.1

The “STO“ function can typically eliminate the need for electro-mechanical contactors with cross-checking auxiliary contacts as per normally

required to provide safety functions.2

The drive has the “STO“ Function built-in as standard and complies with the definition of “Safe torque off“ as defined by IEC 61800-5-2:2007.

The “STO“ Function also corresponds to an uncontrolled stop in accordance with category 0 (Emergency Off), of IEC 60204-1. This means that the motor will coast to a stop when the “STO” function is activated, this method of stopping should be confirmed as being acceptable to the system the motor is driving.

The “STO“ function is recognised as a fail safe method even in the case where the “STO“ signal is absent and a single fault within the drive has

occured, the drive has been proven in respect of this by meeting the following safety standards :

Note : The values acheived above maybe jepardised if the drive is installed outside of the Environmental limits detailed in section 11.1 on page

59.

5.10.3. What STO does not provide

Disconnect and ISOLATE the drive before attempting any work on it. The “STO“ function does not prevent high voltages from being present at the drive power terminals.

Note : The “STO“ function does not prevent the drive from an unexpected re-start. As soon as the “STO“inputs receive the relevant signal it is possible (subject to parameter settings) to restart automatically, Based on this, the function should not be used for carrying out short-term non-electrical machinery operations (such as cleaning or maintenance work).

Note : In some applications additional measures may be required to fulfil the systems safety function needs : the “STO“ function does not provide motor braking. In the case where motor braking is required a time delay safety relay and/or a mechanical brake arrangement or similar method should be adopted, consideration should be made over the required safety function when braking as

the drive braking circuit alone cannot be relied upon as a fail safe method.

Page 24

5.10.4. “STO“ Operation

Fault Code

Code

Number

Description

Corrective Action

“Sto-F”

A fault has been detected within either of the

internal channels of the “STO” circuit.

Refer to local ABB representative

When the “STO” inputs are energised, the “STO” function is in a standby state, if the drive is then given a “Start signal/command” (as per the

start source method selected in parameter 9902 DIGITAL INPUTS FUNCTION SELECT) then the drive will start and operate normally.

When the “STO” inputs are de-energised then the STO Function is activated and stops the drive (Motor will coast), the drive is now in “Safe Torque Off” mode.

To get the drive out of “Safe Torque Off” mode then any “Fault messages” need to be reset and the drive “STO” input needs to be re-energised.

5.10.5. “STO” Status and Monitoring

There are a number of methods for monitoring the status of the “STO” input, these are detailed below:

Drive Display

In Normal drive operation (Mains AC power applied), when the drives “STO” input is de-energised (“STO” Function activated) the drive will highlight this by displaying “InHibit”, (Note: If the drive is in a tripped condition then the relevant trip will be displayed and not “InHibit”).

Drive Output Relay

 Drive relay 1: Setting parameter 1401 USER RELAY 1 OUTPUT (TERMINALS 14, 15 & 16) FUNCTION SELECT to a value of “13” will result

in relay opening when the “STO” function is activated.

 Drive relay 2: Setting parameter 1402 USER RELAY 2 OUTPUT (TERMINALS 17 & 18) FUNCTION SELECT to a value of “13” will result in

relay opening when the “STO” function is activated.

“STO” Fault Codes

5.10.6. “STO” Function response time

The total response time is the time from a safety related event occurring to the components (sum of) within the system responding and becoming safe. (Stop Category 0 in accordance with IEC 60204-1)

 The response time from the “STO” inputs being de-energised to the output of the drive being in a state that will not produce torque in

the motor (“STO” active) is less than 1ms.

 The response time from the “STO” inputs being de-energised to the “STO” monitoring status changing state is less than 20ms  The response time from the drive sensing a fault in the STO circuit to the drive displaying the fault on the display/Digital output

showing drive not healthy is less than 20ms.

Page 25

- Twisted-Pair

- Shielded cables

1213

+24Vdc

Safety relay

Protective Capped Trunking or equivalent to prevent STO Cable short circuit to an external Voltage source.

External

Power

Supply

Protected

shielded cables

1213

Protective Capped Trunking or equivalent to prevent STO Cable short circuit to an external Voltage source.

1 7

Safety

relay

Voltage Rating (Nominal)

24Vdc

STO Logic High

18-30Vdc (Safe torque off in standby)

Current Consumption (Maximum)

100mA

Standard Requirements

SIL2 or PLd SC3 or better (With Forcibly guided Contacts)

Number of Output Contacts

2 independent

Switching Voltage Rating

30Vdc

Switching Current

100mA

Wires should be protected against short circuits as shown above

1 2 3 4 5 6 7 8 9 10 11 12 13

+24Vdc

External

Power

Supply

Safety relay

1 2 3 4 5 6 7 8 9 10 11 12 13

Safety relay

5.10.7. “STO” Electrical Installation

The “STO” wiring shall be protected from inadvertent short circuits or tampering which could lead to failure of the “STO” input signal, further guidance is given in the diagrams below.

In addition to the wiring guidelines for the “STO” circuit below, section 5.1.1 “Recommended installation for EMC compliance should also be followed.

The drive should be wired as illustrated below; the 24Vdc signal source applied to the “STO” input can be either from the 24Vdc on the drive or from an External 24Vdc power supply.

5.10.7.1. Recommended “STO” wiring

Using an External 24Vdc Power Supply. Using the drives on-board 24Vdc supply

Note : The Maximum cable length from Voltage source to the drive terminals should not exceed 25 metres.

5.10.7.2. External Power supply Specification.

5.10.7.3. Safety Relay Specification.

The safety relay should be chosen so that at minimum it meets the safety standards in which the drive meets.

Page 26

5.10.8. Enabling the “STO” Function

The “STO” function is always enabled in the drive regardless of operating mode or parameter changes made by the user.

5.10.9. Testing the “STO” Function

Before commissioning the system the “STO” function should always be tested for correct operation, this should include the following tests:

 With the motor at standstill, and a stop command given to the drive (as per the start source method selected in parameter 9902

DIGITAL INPUTS FUNCTION SELECT):

o De-energise the “STO” inputs (Drive will display ““InHibit”). o Give a start command (as per the start source method selected in parameter 9902 DIGITAL INPUTS FUNCTION SELECT) and

check that the drive still displays “Inhibit” and that the operation is in line with the section 5.10.4 “STO“ Operation and section 5.10.5 “STO” Status and Monitoring

 With the motor running normally (from the drive):

o De-energise the “STO” inputs o Check that the drive displays “InHibit” and that the motor stops and that the operation is in line with the section 5.10.4

“STO“ Operation and section 5.10.5 “STO” Status and Monitoring

5.10.10. “STO” Function Maintenance.

The “STO” function should be included within the control systems scheduled maintenance program so that the function is regularly tested for integrity (Minimum once per Year), furthermore the function should be integrity tested following any safety system modifications or maintenance work.

If drive fault messages are observed refer to section 13.1 for further guidance.

Page 27

NAVIGATE

Used to display real-time information, to access and exit parameter edit mode and to store parameter changes (press for >1 second to toggle between status and parameter mode)

Used to increase speed in real-time mode or to increase parameter values in parameter edit mode

DOWN

Used to decrease speed in real-time mode or to decrease parameter values in parameter edit mode

RESET /

STOP

Used to reset a tripped drive. When in Keypad mode is used to Stop a running drive.

START

When in keypad mode, used to Start a stopped drive or to reverse the direction of rotation if bi-directional keypad mode is enabled.

6. Managing the Keypad

The drive is configured and its operation monitored via the keypad and display.

6.1. Keypad Layout and Function

6.2. Changing Parameters

Page 28

6.3. Resetting Parameters to Factory Default Settings

Page 29

Function

When Display shows...

Press...

Result

Example

Select lowest Parameter

within Group

i.e. 



The first parameter of the

group is selected

Display shows 

Press

Display shows 

Set Parameter to

minimum value

Any numerical value

(Whilst editing a

parameter value)

The parameter is set to

the minimum value

When editing 

Display shows 

Press

Display shows

Adjusting individual digits

within a parameter value

Any numerical value

(Whilst editing a

parameter value)

Individual parameter

digits can be adjusted

When editing 

Display shows

Press

Display shows.

Press

Display shows.

Press

Display shows.

Press

Display shows.

Display

Status



Drive mains power applied, but no Enable or Run signal applied



Motor Autotune in progress.

x.x

Drive running, display shows output frequency (Hz)

Whilst the drive is running, the following displays

can be selected by briefly pressing the button on the drive. Each press of the button will cycle the display through to the next selection.

x.x

Drive running, display shows motor current (Amps)

x.x

Drive Running, display shows motor power (kW)

x.x

Drive Running, display shows customer selected units, see parameters 3400 DISPLAY SCALING FACTOR and 3405 DISPLAY SCALING SOURCE



Drive mains power not present, external 24 Volt control power supply present only



Output power hardware inhibited, hardware enable circuit open. External links are required to the STO inputs (terminals 12 and 13) as shown on page 23.



Parameters reset to factory default settings

For drive fault code displays, refer to section 13.1 on page 62

6.4. Advanced Keypad Operation ShortCuts

6.5. Drive Operating Displays

Page 30

7. Quick Start-up and Control

7.1. Quick Start-up Terminal Control

When delivered, the ACS255 is in the factory default state, meaning that it is set to operate in terminal control mode and all parameters have the default values as indicated in section 9.

 Perform mechanical and electrical installations per section 4 and 5.  Connect the motor to the drive, ensuring the correct star/delta connection for the voltage rating - see section 5.6 on page 22.  Apply the mains power to the drive, then enter the motor data from motor nameplate; 9905 = motor rated voltage, 9906 = motor

rated current, 9907 = motor rated frequency, & 9908 = motor rated speed.

 Connect the Drive Hardware Enable (STO) circuit as follows (see section 5.10.7 “STO” Electrical Installation for further details)

o Link Terminal 1 to Terminals 12 (STO +) o Link Terminal 9 to Terminal 13 (STO -)

Note : If the “STO“ function is being utilised as part of an overall safety system then the circuit should be installed and integrity tested as per the guidance given in section 5.10 “Safe Torque Off”.

 Connect a control switch between the control terminals 1 and 2 ensuring that the contact is open (drive disabled).  Connect a potentiometer (1kΩ min to 10kΩ max) between terminals 5 and 7, and the wiper to terminal 6.

 With the potentiometer set to zero, switch on the supply to the drive. The display will show .  Close the control switch, terminals 1-2. The drive is now ‘enabled’ and the output frequency/speed are controlled by the

potentiometer. The display shows zero speed in Hz (.) with the potentiometer turned to minimum.

 Turn the potentiometer to maximum. The motor will accelerate to 60Hz, the default value of parameter 2008, under the control of the

acceleration ramp time parameter 2202.

 If the potentiometer is turned to minimum, the motor will decelerate to 0Hz, the default minimum speed set in parameter 2007, under

the control of the deceleration ramp parameter 2203. The output speed can be adjusted anywhere between minimum and maximum speed using the potentiometer.

 To display motor current (Amps), briefly press the (Navigate) key.  Press again to display the motor power.  Press again to display the estimated motor speed (RPM). (Motor nameplate RPM must be entered in 9908 = motor rated speed)  Press again to return to speed (Hz) display.

 To stop the motor, disable the drive by opening the control switch (terminals 1-2).  If the enable/disable switch is opened the drive will decelerate to stop at which time the display will show . If the potentiometer

is turned to zero with the enable/disable closed the display will show .(0.0Hz), if left like this for 20 seconds the drive will go into standby mode, display shows , waiting for a speed reference signal.

7.2. Quick Start-up Keypad Control

To allow the ACS255 to be controlled from the keypad in a forward direction only, set parameter 1103 PRIMARY COMMAND SOURCE MODE to 1:

 Connect the drive to the supply, ensuring the correct voltage and fusing protection – see section 11.2 on page 59.  Connect the motor to the drive, ensuring the correct star/delta connection for the voltage rating - see section 5.6 on page 22.  Apply the mains power to the drive, then enter the motor data from motor nameplate; 9905 = motor rated voltage, 9906 = motor

rated current, 9907 = motor rated frequency.

 Connect the Drive Hardware Enable (STO) circuit as follows (see section 5.10.7 “STO“Electrical Installation for further details)

o Link Terminal 1 to Terminals 12 (STO +) o Link Terminal 9 to Terminal 13 (STO -)

 Connect a control switch between the control terminals 1 and 2 ensuring that the contact is open (drive disabled).  Enable the drive by closing the switch between control terminals 1 & 2. The display will show .

 Press the key. The display shows ..  Press to increase speed.  The drive will run forward, increasing speed until is released.

 Press to decrease speed. The drive will decrease speed until is released. The rate of deceleration is limited by the

setting in parameter 2203.

 Press the key. The drive will decelerate to rest at the rate set in parameter 2203.  The display will finally show  at which point the drive is disabled

Page 31

The Autotune will begin immediately when parameter 9910 MOTOR PARAMETER AUTO-TUNE ENABLE = 1 is set regardless of the status of the drive enable signal. Whilst the autotune procedure does not drive or spin the motor, the motor shaft may still turn slightly. It is not normally necessary to uncouple the load from the motor; however the user should ensure that no risk arises from the possible movement of the motor shaft.

It is essential that the correct motor data is entered into the relevant drive parameters. Incorrect parameter settings can result in poor or even dangerous performance.

 To preset a target speed prior to enable, press the key whilst the drive is stopped. The display will show the target speed,

use the & keys to adjust as required then press the key to return the display to .

 Pressing the key will start the drive accelerating to the target speed.  To allow the ACS255 to be controlled from the keypad in a forward and reverse direction, set parameter 1103 =2:  Operation is the same as when parameter 1103=1 for start, stop and changing speed.

 Press the key. The display changes to ..  Press to increase speed  The drive will run forward, increasing speed until is released. Acceleration is limited by the setting in parameter 2202. The

maximum speed is the speed set in parameter 2008.

 To reverse the direction of rotation of the motor, press the key again.

7.3. Sensorless Vector Speed Control Mode

ACS255 can be programmed by the user to operate in Sensorless Vector mode, which provides enhanced low speed torque, optimum motor speed regulation regardless of load and accurate control of the motor torque. In most applications, the default Voltage Vector control mode will provide adequate performance, however if Sensorless Vector operation is required, use the following procedure.

 Enter the motor nameplate details into the relevant parameters as follows

o 9905 MOTOR RATED VOLTAGE o 9906 MOTOR RATED CURRENT o 9907 MOTOR RATED FREQUENCY o (Optional) 9908 MOTOR RATED SPEED (Rpm) o 9915 Motor Power Factor Cos Ø

 Select Sensorless Vector control mode by setting parameter 9903 MOTOR CONTROL MODE = 0  Ensure that the motor is correctly connected to the drive  Carry out a motor data Autotune by setting parameter 9910 MOTOR PARAMETER AUTO-TUNE ENABLE = 1

Page 32

8. Application Macros

1103 (control Mode)

Selected Speed Reference

0 : Terminal Mode

Analog input 1

1 : Keypad Mode (uni-directional)

Digital Potentiometer

2 : Keypad Mode (bi-directional)

Digital Potentiometer

3 : User PI mode

PI controller output

4 : Fieldbus Control

Speed reference via Fieldbus

5 : CANopen

Speed reference via CANopen

O: Stop

C: Run Fwd

O: Stop

C: Run Rev

O: Selected Speed Ref

C: Preset speed 1, 2

Analog 1 Speed reference

O: Preset speed 1 C: Preset speed 2

O: Stop

C: Run Fwd

O: Stop

C: Run Rev

Digital input 3

Analog input 1

Analog input 2

Preset Speed

Off

Preset Speed 1

Off

Preset Speed 2

Off

Preset Speed 3

Off

Preset Speed 4

O: Stop

C: Run Fwd

O: Stop

C: Run Rev

O: Selected Speed Ref

C: Preset speed 1

Analog 1 Speed reference

Analog torque reference

O: Stop

C: Run Fwd

O: Stop

C: Run Rev

O: Selected Speed Ref

C: Preset speed 1

Analog 1 Speed reference

O: Decel ramp 1 (Par 2203)

C: Decel ramp 2 (Par 2206)1)

O: Stop

C: Run Fwd

O: Stop

C: Run Rev

O: Selected Speed Ref

C: Analog input 2

Analog 1 Speed reference

Analog 2 Speed reference

O: Stop

C: Run Fwd

O: Stop

C: Run Rev

O: Selected Speed Ref

C: Preset speed 1

Analog 1 Speed reference

External trip 2)

O: trip C: Run

O: Stop

C: Run Fwd

O: Stop

C: Run Rev

Digital input 3

Analog input 1

Preset Speed

External trip 2)

O: trip C: Run

Off

Preset Speed 1

Off

Preset Speed 2

Off

Preset Speed 3

Preset Speed 4

O: Stop

C: Run Fwd

O: Stop

C: Run Rev

Digital input 3

Analog input 1

Preset Speed

O: Decel ramp 1 (Par 2203)

C: Decel ramp 2 (Par 2206)1)

Off

Preset Speed 1

Off

Preset Speed 2

Off

Preset Speed 3

Preset Speed 4

9902

Digital Input 1

(Terminal 2)

Digital Input 2

(Terminal 3)

Digital Input 3

(Terminal 4)

Analog Input 1

(Terminal 6)

Analog Input 2

(Terminal 10)

O: Stop

C: Run

O: Forward

C: Reverse

O: Selected Speed Ref

C: Preset speed 1, 2

Analog 1 Speed reference

O: Preset speed 1

C: Preset speed 2

O: Stop

C: Run

O: Forward

C: Reverse

Digital input 3

Analog input 1

Analog input 2

Preset Speed

Off

Preset Speed 1

Off

Preset Speed 2

Off

Preset Speed 3

Off

Preset Speed 4

O: Stop

C: Run

O: Forward

C: Reverse

O: Selected Speed Ref

C: Preset speed 1

Analog 1 Speed reference

Analog torque reference

O: Stop

C: Run

O: Forward

C: Reverse

O: Selected Speed Ref

C: Preset speed 1

Analog 1 Speed reference

O: Decel ramp 1 (Par 2203)

C: Decel ramp 2 (Par 2206)1)

O: Stop

C: Run

O: Forward

C: Reverse

O: Selected Speed Ref

C: Analog input 2

Analog 1 Speed reference

Analog 2 Speed reference

O: Stop

C: Run

O: Forward

C: Reverse

O: Selected Speed Ref

C: Preset speed 1

Analog 1 Speed reference

External trip 2)

O: trip C: Run

O: Stop

C: Run

O: Forward

C: Reverse

Digital input 3

Analog input 1

Preset Speed

External trip 2)

O: trip C: Run

Off

Preset Speed 1

Off

Preset Speed 2

Off

Preset Speed 3

Preset Speed 4

O: Stop

C: Run

O: Forward

C: Reverse

Digital input 3

Analog input 1

Preset Speed

O: Decel ramp 1 (Par 2203)

C: Decel ramp 2 (Par 2206)1)

Off

Preset Speed 1

Off

Preset Speed 2

Off

Preset Speed 3

Preset Speed 4

O: Stop

C: Run

O: Forward

C: Reverse

Digital input 3

Analog input 1

Preset Speed

O: Selected Speed Ref

C: Preset speed 1 .. 4

Off

Preset Speed 1

Off

Preset Speed 2

Off

Preset Speed 3

Preset Speed 4

O: Stop

C: Run

O: Forward

C: Reverse

Normally Open (N.O.)

Close to increase speed

Normally Open (N.O.)

Close to reduce speed

O: Selected Speed Ref

C: Preset speed 1

8.1. Overview of macros

Application macros are pre-programmed parameter sets. While starting up the drive, the user selects the macro best suited for the purpose with parameter 9902 DIGITAL INPUTS FUNCTION SELECT and 1103 PRIMARY COMMAND SOURCE MODE.

The term “Selected Speed Reference” in the table below is determined by the value set in 1103 PRIMARY COMMAND SOURCE MODE.

Page 33

O: Stop

C: Run Fwd

O: Stop

C: Run Rev

Digital input 3

Analog input 1

Preset Speed

O: Selected Speed Ref

C: Preset speed 1 .. 4

Off

Preset Speed 1

Off

Preset Speed 2

Off

Preset Speed 3

Preset Speed 4

O: Stop

C: Run Fwd

O: Stop

C: Run Rev

Normally Open (N.O.)

Close to increase speed

Normally Open (N.O.)

Close to reduce speed

O: Selected Speed Ref

C: Preset speed 1

Normally Open (N.O.)

Close to run Fwd

Normally Closed

(N.C.)

Open to Stop

Normally Open (N.O.)

Close to run Rev

Analog 1 Speed reference

O: Selected Speed Ref

C: Preset speed 1

9902 = 1 (Default Macro)

Open

Closed

9902 = 2

Open

Closed

+24 Volt Common

1 +24 Volt Common

Stop

Run 2

Stop

Run

Forward Rotation

Reverse Rotation

3 Forward Rotation

Reverse Rotation

Selected Speed ref

Preset Speed ref

T4 T6

T10

Preset

+10 Volt

5 6

Analog Input 1

Open

1202

0 Volts

Closed

Open

1203

Open

Closed

Open

1204

0 Volts

Closed

Open

1205

Preset Speed 1(1202)

Preset Speed 2(1203)

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

9902 = 3

Open

Closed

9902 = 4

Open

Closed

+24 Volt Common

1 +24 Volt Common

Stop

Run 2

Stop

Run

Forward Rotation

Reverse Rotation

3 Forward Rotation

Reverse Rotation

Selected Speed ref

Preset Speed 1 (1202)

4 Selected Speed ref

Preset Speed 1 (1202)

+10 Volt

5 +10 Volt

Analog Input 1

6 Analog Input 1

0 Volts

7 0 Volts

8 8 9 0 Volts

Analog input 2 (E.g. Torque Reference)

10Decel ramp 1 (2203)

Decel ramp 2 (2206)

11 12

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

9902

Digital Input 1

(Terminal 2)

Digital Input 2

(Terminal 3)

Digital Input 3

(Terminal 4)

Analog Input 1

(Terminal 6)

Analog Input 2

(Terminal 10)

Note

1) The drive will immediately ramp at the rate set in parameter 2206 2nd DECELERATION RAMP TIME.

2) If a motor thermistor (PTC type only, or normally closed thermal switch contact) is to be connected, this must be selected in

parameter 1304. Connect the thermistor between terminal 1 and terminal 10.

8.2. Macro wiring configurations.

Note

1) The drive will immediately ramp at the rate set in parameter 2206 2nd DECELERATION RAMP TIME.

Page 34

9902 = 5

Open

Closed

9902 = 6

Open

Closed

+24 Volt Common

1 +24 Volt Common

Stop

Run 2

Stop

Run

Forward Rotation

Reverse Rotation

3 Forward Rotation

Reverse Rotation

Selected Speed ref

Analog input 2 speed ref

4 Selected Speed ref

Preset Speed 1 (1202)

+10 Volt

5 +10 Volt

Analog Input 1

6 Analog Input 1

0 Volts

7 0 Volts

8 8 9 0 Volts

9 0 Volts

Analog input 2

10External Trip (“F0014”)

11 12

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

9902 = 7

Open

Closed

9902 = 8

Open

Closed

+24 Volt Common

1 +24 Volt Common

Stop

Run 2

Stop

Run

Forward Rotation

Reverse Rotation

3 Forward Rotation

Reverse Rotation

T4 T6

Preset

Open

1202

Closed

Open

1203

Open

Closed

1204

Closed

1205

T4 T6

Preset

Open

1202

Closed

Open

1203

Open

Closed

1204

Closed

1205

5 5 6 6 7 7 8 8 9

0 Volts

9 0 Volts

External Trip (“F0014”)

10Decel ramp 1 (2203)

Decel ramp 2 (2206)

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

9902 = 9

Open

Closed

9902 = 10

Open

Closed

+24 Volt Common

1 +24 Volt Common

Stop

Run 2

Stop

Run

Forward Rotation

Reverse Rotation

3 Forward Rotation

Reverse Rotation

T4 T6

Preset

Open

1202

Closed

Open

1203

Open

Closed

1204

Closed

1205

Increase Speed1)

5 5

6 6 Decrease Speed1)

7 7

8 8 9 0 Volts

9 0 Volts

Selected Speed ref

Preset Speeds

10Selected Speed ref

Preset Speed 1 (1202)

11 12

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

1) Increase/Decrease speed function only works if

parameter 1103 = 1 or 2.

Page 35

9902 = 1 1

Open

Closed

9902 = 12

Open

Closed

+24 Volt Common

1 +24 Volt Common

Stop

Run Forward

2 Stop

Run Forward

Stop

Run Reverse

3 Stop

Run Reverse

Selected Speed ref

Preset Speed ref

T4 T6

T10

Preset

+10 Volt

5 6

Analog Input 1

Open

1202

0 Volts

Closed

Open

1203

Open

Closed

Open

1204

0 Volts

Closed

Open

1205

Preset Speed 1(1202)

Preset Speed 2(1203)

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

9902 = 13

Open

Closed

9902 = 14

Open

Closed

+24 Volt Common

1 +24 Volt Common

Stop

Run Forward

2 Stop

Run Forward

Stop

Run Reverse

3 Stop

Run Reverse

Selected Speed ref

Preset Speed 1 (1202)

4 Selected Speed ref

Preset Speed 1 (1202)

+10 Volt

5 +10 Volt

Analog Input 1

6 Analog Input 1

0 Volts

7 0 Volts

8 8

0 Volts

Analog input 2 (E.g. Torque Reference)

10Decel ramp 1 (2203)

Decel ramp 2 (2206)

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

9902 = 15

Open

Closed

9902 = 16

Open

Closed

+24 Volt Common

1 +24 Volt Common

Stop

Run Forward

2 Stop

Run Forward

Stop

Run Reverse

3 Stop

Run Reverse

Selected Speed ref

Analog input 2 speed ref

4 Selected Speed ref

Preset Speed 1 (1202)

+10 Volt

5 +10 Volt

Analog Input 1

6 Analog Input 1

0 Volts

7 0 Volts

8 8

0 Volts

9 0 Volts

Analog input 2

10External Trip (“F0014”)

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Page 36

9902 = 17

Open

Closed

9902 = 18

Open

Closed

+24 Volt Common

1 +24 Volt Common

Stop

Run Forward

2 Stop

Run Forward

Stop

Run Reverse

3 Stop

Run Reverse

T4 T6

Preset

Open

1202

Closed

Open

1203

Open

Closed

1204

Closed

1205

T4 T6

Preset

Open

1202

Closed

Open

1203

Open

Closed

1204

Closed

1205

5 5

6 6

7 7 8

0 Volts

9 0 Volts

External Trip (“F0014”)

10Decel ramp 1 (2203)

Decel ramp 2 (2206)

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

9902 = 19

Open

Closed

9902 = 20

Open

Closed

+24 Volt Common

1 +24 Volt Common

Stop

Run Forward

2 Stop

Run Forward

Stop

Run Reverse

3 Stop

Run Reverse

T4 T6

Preset

Open

1202

Closed

Open

1203

Open

Closed

1204

Closed

1205

Increase Speed1)

5 5

6 6 Decrease Speed1)

7 7 8 8

0 Volts

9 0 Volts

Selected Speed ref

Preset Speeds

10Selected Speed ref

Preset Speed 1 (1202)

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

2) Increase/Decrease speed function only works if

parameter 1103 = 1 or 2.

9902 = 21

Open

Closed

+24 Volt Common

N.O. Contact-Start Forward

N.C. Closed Contact - Stop

N.O. Contact-Start Reverse

+10 Volt

6 Analog Input 1

Analog Input 1

7 0 Volts

0 Volts

8 9 0 Volts

Selected Speed ref

Preset Speed 1 (1202)

Safe Inhibit

Normal Operation

Safe Inhibit

Normal Operation

Page 37

“Status Mode”

H StoPH

Press for >1sec to enter

“Short/Long Parameter group

selection mode”

Timeout (300s)

Use to select Short “ ” or

Long “ ” group parameters

PAr SH

Press to exit “Short/Long Parameter group

selection mode” and save selection

“Parameter mode”

(End number flashing)

P9902H

PAr SH

PAr LH

PAr SH

Parameter No.

9902

9905

9906

9907

0401

1103

1202

1203

1204

1301

2008

2102

2202

ABB Short parameter group

(1611 not set to "101")

PAr LH

Parameter No.

0000

0401

1100

1103

1202

1203

1204

1205

3400

4001

4002

4005

4010

4011

4016

5302

9902

9905

9906

9907

9908

Long parameter group (1611 =

"101")>>(Currently selected

via keyapd "PAR L" on

ACS150)

9. Parameters

9.1. Parameter Structure

The parameters within the drive are split into 2 groups, group 1 is titled “Short Parameter mode” displayed as “Par S” on the drive display and group 2 is titled “Long Parameter mode” displayed as “Par L” on the drive display.

 “Par S” group brings together the most commonly used parameters to aid quick setup.  “Par L” group includes all of the drive parameters.

9.1.1. Group Navigation.

9.1.2. Parameter Structure table.

Page 38

9.2. Parameters in the Short parameter mode

Parameters in the Short parameter mode

No.

Name/Value

Description

Def

99 START-UP DATA

Application macros. Definition of motor set-up data. As shown in section 8.1 Parameter 9902 has a number of pre-programmed parameter sets (and terminal functions) which the user selects to best suit the application requirements.

9902 DIGITAL INPUTS

FUNCTION SELECT

Defines the function of the digital inputs depending on the control mode setting in Parameter 1103 PRIMARY COMMAND SOURCE MODE. (See section 8.1 for further detail)

9905

MOTOR RATED VOLTAGE

This parameter should be set to the rated (nameplate) voltage of the motor (Volts).

Drive Rating

Dependent

0…660V

Voltage

Note : The stress on the motor insulation is always dependant on the drive supply voltage. This also applies in the case where the motor voltage rating is lower than the rating of the drive and the supply of the drive.

9906

MOTOR RATED CURRENT

This parameter should be set to the rated (nameplate) current of the motor.

Drive Rating

Dependent

0.2* drive rated output

current…1.0* drive rated

output current

Current

9907

MOTOR RATED FREQUENCY

This parameter should be set to the rated (nameplate) frequency of the motor

60Hz

25…500Hz

Frequency

04 FAULT HISTORY

Fault history (read only)

0401

Trip History Log

Displays the last four fault codes for the drive. Refer to section 13.1 for further information

REFERENCE SELECT

The drive can accept a variety of references in addition to the conventional analog input, potentiometer and keypad signals.

1103

PRIMARY COMMAND SOURCE MODE

0: Terminal Control

0: TERMINAL CONTROL

The drive responds directly to signals applied to the control terminals.

1: UNI-DIRECTIONAL

KEYPAD CONTROL

The drive can be controlled in the forward direction only using an external or remote Keypad.

2: BI-DIRECTIONAL

KEYPAD CONTROL.

The drive can be controlled in the forward and reverse directions using an external or remote Keypad. Pressing the keypad START button toggles between forward and reverse.

3: PI CONTROL

The output frequency is controlled by the internal PI controller.

4: FIELDBUS CONTROL

Control via Modbus RTU.

5 : CAN BUS CONTROL.

Control via CAN bus connected to the RJ45 serial interface connector

12 CONSTANT SPEEDS

Constant speeds. Constant speed activation overrides the external speed reference. Constant speed selections are ignored if the drive is in the local control mode.

Refer to section 8.1 for how to make constant speed selections from the drive control terminals.

Preset Speeds / Frequencies selected by digital inputs depending on the setting of Parameter

9902. If Parameter 9908 = 0, the values are entered as Hz. If Parameter 9908 > 0, the values are entered as Rpm. Setting a negative value will reverse the direction of motor rotation.

1202

Preset / Jog Frequency / Speed 1

Defines constant speed 1 (that is the drive output frequency)

5.0Hz/RPM

2007…-2008

Output Frequency

1203

Preset / Jog Frequency / Speed 2

Defines constant speed 2 (that is the drive output frequency)

10.0Hz/RPM 2007…-2008

Output Frequency

1204

Preset / Jog Frequency / Speed 3

Defines constant speed 3 (that is the drive output frequency)

25.0Hz/RPM

2007…-2008

Output Frequency

The following table describes the parameters that are visible in the Short parameter mode. See section 9.1 on page 38 for how to select the parameter mode. All parameters are presented in detail in section Parameters in the Long parameter mode.

Page 39

Parameters in the Short parameter mode

No.

Name/Value

Description

Def

13 ANALOG INPUTS

Anolog input signal offset

1301

ANALOG INPUT 1 OFFSET

Sets an offset, as a percentage of the full scale range of the input, which is applied to the analog input signal

0.0%

-500…500 %

Value in percent of the full scale range of the input Example: If the analog input signal format is 0-10V, offset = 20% . An analog input signal level of 7 Volts gives the following result :Analog input level (%) = 7/10 = 70% Result = 70-20 (%) = 50%

20 LIMITS

Maximum frequency

2008

MAXIMUM FREQUENCY / SPEED LIMIT

Maximum output frequency or motor speed limit – Hz or rpm. If parameter 9908 MOTOR RATED SPEED >0, the value entered / displayed is in Rpm

60.0 Hz 2007…500.0 Hz

Maximum frequency

21 START/STOP

Stop mode of the motor

2102

STOP MODE

Selects the motor stop function

0 = Ramp to stop

0 : Ramp To Stop

When the enable signal is removed, the drive will ramp to stop, with the rate controlled by parameter 2203 DECEL RAMP TIME as described above. In this mode, the drive brake transistor is disabled

1 : Coast to Stop

When the enable signal is removed, the drive output is immediately disabled, and the motor will coast (freewheel) to stop. If the load can continue to rotate due to inertia, and the drive may possibly be re-enabled whilst the motor is still rotating, the spin start function (Parameter 2101 SPIN START ENABLE) should be enabled. In this mode, the drive brake transistor is disabled.

2 : Ramp To Stop

When the enable signal is removed, the drive will ramp to stop, with the rate controlled by Parameter 2203 DECEL RAMP TIME as described above. The ACS255 Brake chopper is also enabled in this mode.

3 : Coast to Stop

When the enable signal is removed, the drive output is immediately disabled, and the motor will coast (freewheel) to stop. If the load can continue to rotate due to inertia, and the drive may possibly be re-enabled whilst the motor is still rotating, the spin start function (Parameter 2101 SPIN START ENABLE) should be enabled. The drive brake chopper is enabled in this mode, however it will only activate when required during a change in the drive frequency setpoint, and will not activate when stopping.

22 ACCEL/DECEL

Acceleration and deceleration times

2202

ACCELERATION RAMP TIME

Acceleration ramp time from 0 to base speed (Parameter 9907 MOTOR RATED FREQUENCY) in seconds.

5.0 s

0.00…600.0 s

Time

2203

DECELERATION RAMP TIME

Deceleration ramp time from base speed (Parameter 9907 MOTOR RATED FREQUENCY) to standstill in seconds. When set to zero, fastest possible ramp time without trip is activated.

5.0 s

0.00…600.0 s

Time

Page 40

9.3. Read Only Status parameters

Actual signals

No.

Name/Value

Description

01 OPERATING DATA

Basic signals for monitoring the drive (read-only). For selection of an actual signal to be displayed on the control panel, see parameter 3405 DISPLAY SCALING SOURCE.

0102

ROTOR SPEED (ESTIMATED)

In Vector control mode, this parameter displays the estimated rotor speed of the motor.

0105

OUTPUT TORQUE

Displays the instantaneous output torque level produced by the motor in %.

0107

DC BUS VOLTAGE

Displays the instantaneous DC Bus Voltage internally within the drive in V DC.

0109

APPLIED MOTOR VOLTAGE

Displays the instantaneous output voltage from the drive to the motor V AC.

0110

DRIVE TEMPERATURE

Displays the Instantaneous Heatsink Temperature measured by the drive in ˚C.

0111

PRE RAMP SPEED CONTROLLER REFERENCE

Displays the set point reference input applied to the drive internal speed controller in Hz.

0112

TORQUE CONTROLLER REFERENCE

Displays the set point reference input applied to the drive internal torque controller in %.

0113

DIGITAL SPEED REFERENCE (MOTORISED POT)

Displays the value of the drive internal Motorised Pot (used for keypad) speed reference in Hz.

0115

ENERGY CONSUMPTION kWh METER

Displays the amount of energy consumed by the drive in kWh. When the value reaches 1000, it is reset back to 0.0, and the value of Parameter 0141 (*MWh meter) is increased.

0120

ANALOG INPUT 1 APPLIED SIGNAL LEVEL

Displays the signal level applied to analog input 1 (Terminal 6) in % after scaling and offsets have been applied.

0121

ANALOG INPUT 2 APPLIED SIGNAL LEVEL

Displays the signal level applied to analog input 2 (Terminal 10) in % after scaling and offsets have been applied.

0126

PI CONTROLLER OUTPUT

Displays the output level of the PI controller in %.

0128

PI REFERENCE (SETPOINT)

Displays the setpoint input to the PI controller in %.

0130

PI FEEDBACK LEVEL

Displays the Feedback input signal to the PI controller in %.

0135

FIELDBUS COMMUNICATION SPEED REFERENCE

Displays the setpoint being received by the drive from the currently active Fieldbus interface in Hz.

0140

DRIVE LIFETIME OPERATING TIME

Displays the total operating time of the drive. The first value shown is the number of hours. Pressing the Up key will display the minutes and seconds. (HH:MM:SS)

0141

ENERGY CONSUMPTION MWh METER

Displays the amount of energy consumed by the drive in MWh.

0160

DIGITAL INPUT STATUS

Displays the status of the drive inputs, starting with the left hand side digit = Digital Input 1 etc.

0181

MOTOR MAGNETISING CURRENT (Id)

Displays the motor magnetising Current in AMPS providing an auto tune has been successfully completed.

0182

MOTOR ROTOR CURRENT (Iq)

Displays the motor Rotor (torque producing) current in Amps, providing an auto tune has been successfully completed.

0183

DC BUS VOLTAGE RIPPLE LEVEL

Displays the level of ripple present on the DC Bus Voltage in V DC. This parameter is used by the ACS255 for various internal protection and monitoring functions.

0184

MOTOR STATOR RESISTANCE (Rs)

Displays the measured motor stator resistance in ohms, providing an auto tune has been successfully completed.

0185

MOTOR STATOR INDUCTANCE (Ls)

Displays the measured motor stator inductance in H, providing an auto tune has been successfully completed.

0186

MOTOR ROTOR RESISTANCE (Rr)

Displays the measured motor rotor resistance in ohms, providing an auto tune has been successfully completed.

0188

OPERATING TIME ACCUMULATED WITH HEATSINK TEMPERATURE ABOVE 80°C

Displays the amount of time in hours and minutes that the ACS255 has operated for during its lifetime with a heatsink temperature in excess of 80°C. This parameter is used by the ACS255 for various internal protection and monitoring functions. (HH:MM:SS)

9.3.1. Read Only Status parameter access and navigation.

The user must be in the Long Parameter group to gain access to the Read only status parameters. See section 9.1.1 for how to navigate to the long parameter group.

In the Long Parameter Group when the user scrolls to parameter “0000”, pressing will display “0104”, the User can then scroll to the required Read only status parameter (as listed in the table above). Pressing once more will then display the value of that particular Read only status parameter.

For those parameters which have multiple values (e.g. software ID parameter 3301), pressing the and keys will display the different values within that parameter.

Pressing returns to the next level up. If is then pressed again (without pressing or ), the display changes to the next level up (main parameter level, i.e. Parameter “0000”).

The following table includes the descriptions of all Read Only status parameters.

Page 41

Actual signals

No.

Name/Value

Description

Def

0189

OPERATING TIME ACCUMULATED WITH AMBIENT TEMPERATURE ABOVE 80°C

Displays the amount of time in hours and minutes that the ACS255 has operated for during its lifetime with an ambient temperature in excess of 80°C. This parameter is used by the ACS255 for various internal protection and monitoring functions. (HH:MM:SS)

0190

DRIVE INTERNAL COOLING FAN TOTAL OPERATING TIME

Displays the total operating time of the ACS255 internal cooling fans. The first value shown is the number of hours. Pressing the Up key will display the minutes and seconds. This is used for scheduled maintenance information (HH:MM:SS)

0191

DC BUS VOLTAGE LOG (256ms) (V DC)

These parameters are used to store the history of various measured levels within the drive at various regular time intervals prior to a trip. The values are frozen when a fault occurs and can be used for

0192

DC BUS VOLTAGE RIPPLE LOG (20ms) (V DC)

0193

HEATSINK TEMPERATURE LOG (30s) (°C)

0194

AMBIENT TEMPERATURE LOG (30s) (°C)

0195

MOTOR CURRENT LOG (256ms) (A)

04 FAULT HISTORY

Fault history (read-only)

0402

DRIVE RUN TIME SINCE LAST TRIP (1)

Displays the total operating time of the drive since the last fault occurred. The first value shown is the number of hours. Pressing the Up key will display the minutes and seconds. (HH:MM:SS)

0415 DRIVE RUN TIME SINCE LAST

TRIP (2)

Displays the total operating time of the drive since the last fault occurred. The first value shown is the number of hours. Pressing the Up key will display the minutes and seconds. (HH:MM:SS)

0416

DRIVE RUN TIME SINCE LAST DISABLE

Displays the total operating time of the drive since the last Run command was received. The first value shown is the number of hours. Pressing the Up key will display the minutes and seconds. (HH:MM:SS)

0417

INTERNAL EFFECTIVE SWITCHING FREQUENCY

Displays the actual output switching frequency which the drive is currently operating at.

0423

INTERNAL I/O COMMS ERROR COUNT

0…65535

0424

INTERNAL DSP COMMS ERROR COUNT

0…65535

0425

MODBUS COMMS ERROR COUNT

0…65535

0426

CANBUS COMMS ERROR COUNT

0…65535

33 INFORMATION

Firmware package version, serial number etc..

3301

SOFTWARE VERSION AND CHECKSUM

Displays the software version of the drive.

3303

DRIVE SERIAL NUMBER

Displays the unique serial number of the drive.

3304

DRIVE TYPE

Displays the type details of the drive.

Page 42

Parameters in the Long parameter mode

Index

Name/Selection

Description

Def

0000 Read only parameters access

Press the button when in this parameter to access the read only parameters as listed in section 9.3 on page 41.

FAULT HISTORY

Fault history (read-only)

0401

TRIP HISTORY LOG

Displays the last four fault codes for the drive. Refer to section 13.1 for further information.

REFERENCE SELECT

The drive can accept a variety of references in addition to the conventional analog input, potentiometer and keypad signals.

1100

KEYPAD MODE RESTART SPEED

This parameter is only active when parameter 1103 = 1 or 2. When settings 0 to 3 are used, the drive must be started by pressing the Start key on the keypad. When settings 4 – 7 are used, the drive starting is controlled by the enable digital input.

1 : Previous Operating Speed

0 : MINIMUM SPEED

Following a stop and restart, the drive will always initially run at the minimum speed parameter 2007 MIN SPEED LIMIT.

1 : PREVIOUS OPERATING SPEED

Following a stop and restart, the drive will return to the last keypad setpoint speed used prior to stopping

2 : CURRENT RUNNING SPEED

Where the ACS255 is configured for multiple speed references (typically Hand / Auto control or Local / Remote control), when switched to keypad mode by a digital input, the drive will continue to operate at the last operating speed

3 : PRESET SPEED 4

Following a stop and restart, the ACS255 will always initially run at Preset Speed 4 (Par 1205)

4 : MINIMUM SPEED (TERMINAL ENABLE)

Following a stop and restart, the drive will always initially run at the minimum speed parameter 2007 MIN SPEED LIMIT.

5 : PREVIOUS OPERATING SPEED (TERMINAL ENABLE)

Following a stop and restart, the drive will return to the last keypad setpoint speed used prior to stopping.

6 : CURRENT RUNNING SPEED (TERMINAL ENABLE)

7 : PRESET SPEED 4 (TERMINAL ENABLE).

Following a stop and restart, the ACS255 will always initially run at Preset Speed 4 (Par 1205)

1103

PRIMARY COMMAND SOURCE MODE

0: Terminal Control

0: TERMINAL CONTROL

The drive responds directly to signals applied to the control terminals.

1: UNI-DIRECTIONAL

KEYPAD CONTROL

The drive can be controlled in the forward direction only using an external or remote Keypad.

2: BI-DIRECTIONAL

KEYPAD CONTROL.

The drive can be controlled in the forward and reverse directions using an external or remote Keypad. Pressing the keypad START button toggles between forward and reverse.

3: PI CONTROL

The output frequency is controlled by the internal PI controller.

4: FIELDBUS CONTROL

Control via Modbus RTU.

5 : CAN BUS CONTROL.

Control via CAN bus connected to the RJ45 serial interface connector

9.4. Parameters in the Long parameter mode

The following table includes the complete descriptions of all parameters that are visible only in the Long parameter mode. See section 9.1 on page 38 for how to select the parameter mode.

Page 43

Parameters in the Long parameter mode

Index

Name/Selection

Description

Def

CONSTANT SPEEDS

Constant speed selection and values. It is possible to have four constant speeds (positive or negative values). Constant speeds. Constant speed activation overrides the external speed reference. Constant speed selections are ignored if the drive is in the local control mode.

Refer to section 8.1 for how to make constant speed selections from the drive control terminals.

Preset Speeds / Frequencies selected by digital inputs depending on the setting of Parameter

9902.

If Parameter 9908 = 0, the values are entered as Hz. If Parameter 9908 > 0, the values are entered as Rpm. Setting a negative value will reverse the direction of motor rotation.

1202

PRESET / JOG FREQUENCY / SPEED 1

Defines constant speed 1 (that is the drive output frequency)

5.0Hz/RPM

2007…-2008

Output Frequency

1203

PRESET / JOG FREQUENCY / SPEED 2

Defines constant speed 2 (that is the drive output frequency)

10.0Hz/RPM 2007…-2008

Output Frequency

1204

PRESET / JOG FREQUENCY / SPEED 3

Defines constant speed 3 (that is the drive output frequency)

25.0Hz/RPM 2007…-2008

Output Frequency

1205

PRESET / JOG FREQUENCY / SPEED 4

Defines constant speed 4 (that is the drive output frequency)

60.0Hz/RPM 2007…-2008

Output Frequency

ANALOG INPUTS

Analog input signal processing

1300

ANALOG INPUT 1 (TERMINAL 6) FORMAT

Selects the type of reference source into terminal 6.



0 to 10 Volt Signal (Uni-polar)



10 to 0 Volt Signal (Uni-polar)



-10 to +10 Volt Signal (Bi-polar)



0 to 20mA Signal



4 to 20mA Signal, the ACS255 will trip and show the fault code  if the signal level falls below 3mA



4 to 20mA Signal, the ACS255 will ramp to stop if the signal level falls below 3 mA

 

20 to 4mA Signal, the ACS255 will trip and show the fault code  if the signal level falls below 3mA



20 to 4mA Signal, the ACS255 will ramp to stop if the signal level falls below 3mA

1301

ANALOG INPUT 1 OFFSET

Sets an offset, as a percentage of the full scale range of the input, which is applied to the analog input signal

0.0%

-500…500 %

1302

ANALOG INPUT 1 SCALING

Scales the analog input by this factor, (as a percentage of the full scale range of this input).

100.0%

0.0…2000.0 %

Example: If parameter 1300 ANALOG INPUT 1 FORMAT is set for 0 – 10V, and the scaling factor is set to 200.0%, a 5 volt input will result in the drive running at maximum speed as set in parameter 2008 MAX SPEED LIMIT

1304

ANALOG INPUT 2 (TERMINAL 10) FORMAT

Selects the type of reference source into terminal 10.



0 to 10 Volt Signal (Uni-polar)



10 to 0 Volt Signal (Uni-polar)



Motor PTC Thermistor Input



0 to 20mA Signal



4 to 20mA Signal, the ACS255 will trip and show the fault code  if the signal level falls below 3mA



4 to 20mA Signal, the ACS255 will ramp to stop if the signal level falls below 3 mA

 

20 to 4mA Signal, the ACS255 will trip and show the fault code  if the signal level falls below 3mA

Page 44

Parameters in the Long parameter mode

Index

Name/Selection

Description

Def

1305

ANALOG INPUT 2 OFFSET

Sets an offset, as a percentage of the full scale range of the input, which is applied to the analog input signal

0.0%

-500…500 %

1307

ANALOG INPUT 2 SCALING

Scales the analog input by this factor, (as a percentage of the full scale range of this input).

100.0%

0.0…2000.0 %

Example: If parameter 1304 ANALOG INPUT 2 FORMAT is set for 0 – 10V, and the scaling factor is set to 200.0%, a 5 volt input will result in the drive running at maximum speed as set in parameter 2008 MAX SPEED LIMIT

RELAY OUTPUTS

Status information indicated through relay output and relay operating delays

1401

USER RELAY 1 OUTPUT (TERMINALS 14, 15 & 16) FUNCTION SELECT

Selects the function assigned to Relay Output 1. The relay has three output terminals, Logic 1 indicates the relay is active, and therefore terminals 14 and 15 will be linked together.

Note : When using settings 4 – 7, parameters 3203 USER RELAY 1 UPPER LIMIT and 3202 USER RELAY 1 LOWER LIMIT must be used together to control the behavior. The output will switch to Logic 1 when the selected signal exceeds the value programmed in parameter 3203 USER RELAY 1 UPPER LIMIT, and return to Logic 0 when the signal falls below the value programmed in parameter 3202 USER RELAY 1 LOWER LIMIT.

1: Drive

Ready

0 : DRIVE ENABLED (RUNNING).

Logic 1 when the motor is enabled.

1: DRIVE READY

Logic 1 when power is applied to the drive and no fault exists.

2 : AT TARGET FREQUENCY (SPEED)

Logic 1 when the output frequency matches the setpoint frequency.

3: OUTPUT FREQUENCY >

0.0 HZ

Logic 1 when the drive output frequency to the motor is exceeds 0.0Hz.

4 : OUTPUT FREQUENCY

>= LIMIT

Logic 1 when the motor speed exceeds the adjustable limit. (See note above)

5 : OUTPUT CURRENT >= LIMIT

Logic 1 when the motor current exceeds the adjustable limit. (See note above)

6 : OUTPUT TORQUE >= LIMIT

Logic 1 when the motor torque exceeds the adjustable limit. (See note above)

7 : ANALOG INPUT 2 SIGNAL LEVEL >= LIMIT.

Logic 1 when the signal applied to the Analog Input 2 exceeds the adjustable limit. (See note above)

8 : RESERVED

No Function

9 : RESERVED

No Function

10 : RESERVED

No Function

11 : RESERVED

No Function

12 : DRIVE TRIPPED

Logic 1 when the drive has tripped and the display shows the fault code.

13 : STO STATUS.

Logic 1 when both STO inputs are present and the drive is able to be operated.

1402

USER RELAY 2 OUTPUT (TERMINALS 17 & 18) FUNCTION SELECT

Selects the function assigned to Relay Output 2. The relay has three output terminals, Logic 1 indicates the relay is active, and therefore terminals 17 and 18 will be linked together.

Note : When using settings 4 – 7, parameters 3206 USER RELAY 2 UPPER LIMIT and 3205 USER RELAY 2 LOWER LIMIT must be used together to control the behaviour. The output will switch to Logic 1 when the selected signal exceeds the value programmed in parameter 3206 USER RELAY 2 UPPER LIMIT, and return to Logic 0 when the signal falls below the value programmed in parameter 3205 USER RELAY 2 LOWER LIMIT.

0 : Drive Enabled (Running). Logic 1 when the motor is enabled

1: DRIVE READY

Logic 1 when power is applied to the drive and no fault exists

2 : AT TARGET FREQUENCY (SPEED)

Logic 1 when the output frequency matches the setpoint frequency

3: OUTPUT FREQUENCY

> 0.0 HZ

Logic 1 when the drive output frequency to the motor is exceeds 0.0Hz

4 : OUTPUT FREQUENCY

>= LIMIT

Logic 1 when the motor speed exceeds the adjustable limit

5 : OUTPUT CURRENT >= LIMIT

Logic 1 when the motor current exceeds the adjustable limit

6 : OUTPUT TORQUE >= LIMIT

Logic 1 when the motor torque exceeds the adjustable limit

7 : ANALOG INPUT 2

SIGNAL LEVEL >= LIMIT

1 Logic when the signal applied to the Analog Input 2 exceeds the adjustable limit

Page 45

Parameters in the Long parameter mode

Index

Name/Selection

Description

Def

9 : RESERVED.

No Function

10 : RESERVED

No Function

11 : RESERVED.

No Function

12 : DRIVE TRIPPED

Logic 1 when the drive has tripped and the display shows the fault code.

13 : STO STATUS

Logic 1 when both STO inputs are present and the drive is able to be operated

1404

RELAY OUTPUT HYSTERESIS CONTROL

This parameter works in conjunction with parameter 1501 ANALOG OUTPUT 1 FUNCTION SELECT and 1507 ANALOG OUTPUT 2 FUNCTION SELECT = 2 or 3 to set a band around the target speed (1501 = 2) or zero speed (1501 = 3). When the speed is within this band, the drive is considered to be at target speed or Zero speed.

This function is used to prevent “chatter” on the relay output if the operating speed

coincides with the level at which the digital / relay output changes state. e.g. if parameter 1507 ANALOG OUTPUT 2 FUNCTION SELECT = 3, 2008 MAXIMUM FREQUENCY/SPEED LIMIT = 50Hz and parameter 1404 = 5%, the relay contacts close above 2.5Hz

0.3%

0.0…25%

ANALOG/DIGITAL OUTPUTS

Analog output signal processing

1501

ANALOG OUTPUT 1 (TERMINAL 8) FUNCTION SELECT

Selects the type of output signal information indicated from terminal 8. Note : When using settings 0 – 7 the output is a digital format (Logic 1 = 24V). When using settings 8– 11 the output is an analog format.

Note : When using settings 4 – 7, parameters 3203 ADJUSTABLE THRESHOLD 1 UPPER LIMIT and 3202 ADJUSTABLE THRESHOLD 1 LOWER LIMIT must be used together to control the behaviour. The output will switch to Logic 1 when the selected signal exceeds the value programmed in parameters 3203 ADJUSTABLE THRESHOLD 1 UPPER LIMIT, and return to Logic 0 when the signal falls below the value programmed in 3202 ADJUSTABLE THRESHOLD 1 LOWER LIMIT.

8 : Output Frequency (Motor Speed)

0 : DRIVE ENABLED (RUNNING)

Logic 1 when the ACS255 is enabled (Running)

1: DRIVE READY

Logic 1 When no Fault condition exists on the drive

2 : AT TARGET FREQUENCY (SPEED).

Logic 1 when the output frequency matches the setpoint frequency

3 : OUTPUT FREQUENCY > 0.0

Logic 1 when the motor runs above zero speed

4 : OUTPUT FREQUENCY

>= LIMIT

Logic 1 when the motor speed exceeds the adjustable limit. (See note above)

5 : OUTPUT CURRENT >=

LIMIT

Logic 1 when the motor current exceeds the adjustable limit. (See note above)

6 : MOTOR TORQUE >=

LIMIT

Logic 1 when the motor torque exceeds the adjustable limit. (See note above)

7 : ANALOG INPUT 2 SIGNAL LEVEL >= LIMIT.

Logic 1 when the signal applied to the Analog Input 2 exceeds the adjustable limit. (See note above)

8 : OUTPUT FREQUENCY (MOTOR SPEED).

0 to Parameter 2008 MAXIMUM FREQUENCY/SPEED LIMIT

9 : OUTPUT (MOTOR) CURRENT.

0 to 200% of Parameter 9906 MOTOR RATED CURRENT

10 : MOTOR TORQUE.

0 to 200% of motor rated torque

11 : OUTPUT (MOTOR) POWER

0 to 150% of drive rated power

1504

ANALOG OUTPUT 1 (TERMINAL 8) FORMAT

Selects the type of output signal from terminal 8



0 to 10V



10 to 0V



0 to 20mA



20 to 0mA



4 to 20mA



20 to 4mA

Page 46

Parameters in the Long parameter mode

Index

Name/Selection

Description

Def

1507

ANALOG OUTPUT 2 (TERMINAL 11) FUNCTION SELECT

Selects the type of output signal information indicated from terminal 11. Note : When using settings 0 – 7 the output is a digital format (Logic 1 = 24V). When using settings 8– 11 the output is an analog format.

9 : Output (Motor) Current.

0 : DRIVE ENABLED (RUNNING)

Logic 1 when the ACS255 is enabled (Running)

1: DRIVE READY

Logic 1 When no Fault condition exists on the drive

2 : AT TARGET FREQUENCY (SPEED).

Logic 1 when the output frequency matches the setpoint frequency

3 : OUTPUT FREQUENCY

> 0.0

Logic 1 when the motor runs above zero speed

4 : OUTPUT FREQUENCY >= LIMIT

Logic 1 when the motor speed exceeds the adjustable limit. (See note above)

5 : OUTPUT CURRENT >= LIMIT

Logic 1 when the motor current exceeds the adjustable limit. (See note above)

6 : MOTOR TORQUE >= LIMIT

Logic 1 when the motor torque exceeds the adjustable limit. (See note above)

7 : ANALOG INPUT 2 SIGNAL LEVEL >= LIMIT.

Logic 1 when the signal applied to the Analog Input 2 exceeds the adjustable limit. (See note above)

8 : OUTPUT FREQUENCY (MOTOR SPEED).

0 to Parameter 2008 MAXIMUM FREQUENCY/SPEED LIMIT

9 : OUTPUT (MOTOR) CURRENT.

0 to 200% of Parameter 9906 MOTOR RATED CURRENT

10 : MOTOR TORQUE.

0 to 200% of motor rated torque

11 : OUTPUT (MOTOR) POWER

0 to 150% of drive rated power

1508

ANALOG OUTPUT 2 (TERMINAL 11) FORMAT

Selects the type of output signal from terminal 11



0 to 10V



10 to 0V



0 to 20mA



20 to 0mA



4 to 20mA



20 to 4mA

16 SYSTEM CONTROLS

Run enable, parameter lock etc.

1602

PARAMETER ACCESS UNLOCK

If parameter 1603 PARAMETER ACCESS CODE DEFINITION has had a value entered, then the matching value needs to be entered here in order to give read-write access to the parameters.

0…65535

See section 9.5 for more details

1603

PARAMETER ACCESS CODE DEFINITION

To make all parameters read-only (except parameter 1602 Parameter Access Unlock), enter a value in this parameter.

0…65535

See section 9.5 for more details

20 LIMITS

Drive operation limits

2005

OVER VOLTAGE CURRENT LIMIT

This parameter is only valid in vector speed control mode and will come into function once the drive DC bus voltage increases above a preset limit This voltage limit is set internally just below the over voltage trip level. This parameter will effectively limit the output torque current in order to prevent a large current flowing back to the drive, which may cause an Over-voltage trip. A small value in this parameter will limit the motor control torque when the drive DC bus voltage exceeds the preset limit. A higher value may cause a significant distortion in the motor current, which may cause an aggressive, rough motor behaviour.

1.0%

0.0…100.0

Page 47

Parameters in the Long parameter mode

Index

Name/Selection

Description

Def

2006

MAINS LOSS RIDE THROUGH / STOP CONTROL

Controls the behaviour of the drive in response to a loss of mains power supply whilst the drive is enabled.

0: Mains Loss Ride Through.

0: MAINS LOSS RIDE THROUGH.

The ACS255 will attempt to continue operating by recovering energy from the load motor. Providing that the mains loss period is short, and sufficient energy can be recovered before the drive control electronics power off, the drive will automatically restart on return of mains power.

1: COAST TO STOP.

The ACS255 will immediately disable the output to the motor, allowing the load to coast or free wheel. When using this setting with high inertia loads, the Spin Start function Parameter 2101 SPIN START ENABLE may need to be enabled.

2: FAST RAMP TO STOP.

The drive will ramp to stop at the rate programmed in the 2nd deceleration time as set in parameter 2206 2nd DECELERATION RAMP TIME.

3: DC BUS POWER SUPPLY MODE.

This mode is intended to be used when the drive is powered directly via the +DC and –DC Bus connections. Refer to your ABB Sales Partner for further details.

2007

MINIMUM FREQUENCY / SPEED LIMIT

Minimum output frequency or motor speed limit – Hz or rpm. If parameter 9908 MOTOR RATED SPEED >0, the value entered / displayed is in Rpm

0.0 Hz

0.0 HZ…2008

Minimum frequency

2008

MAXIMUM FREQUENCY / SPEED LIMIT

Maximum output frequency or motor speed limit – Hz or rpm. If parameter 9908 MOTOR RATED SPEED >0, the value entered / displayed is in Rpm

60.0 Hz 2007…500.0 Hz

Maximum frequency

2014

TORQUE CONTROL REFERENCE / LIMIT SOURCE

When parameter 9903 MOTOR CONTROL MODE = 0, this parameter defines the source for the maximum output torque limit. When parameter 9903 MOTOR CONTROL MODE = 1, this parameter defines the source for the torque reference (setpoint).

0: Fixed Digital

0: FIXED DIGITAL

The torque controller reference / limit is set in parameter 2017 MAXIMUM MOTORING TORQUE LIMIT/CURRENT LIMIT.

1: ANALOG INPUT 1

The output torque is controlled based on the signal applied to Analog Input 1, whereby 100% input signal level will result in the drive output torque being limited by the value set in parameter 2017 MAXIMUM MOTORING TORQUE LIMIT/CURRENT LIMIT.

2: ANALOG INPUT 2

The output torque is controlled based on the signal applied to Analog Input 2, whereby 100% input signal level will result in the drive output torque being limited by the value set in parameter 2017 MAXIMUM MOTORING TORQUE LIMIT/CURRENT LIMIT..

3: FIELDBUS.

The output torque is controlled based on the signal from the communications Fieldbus, whereby 100% input signal level will result in the drive output torque being limited by the value set in parameter 2017 MAXIMUM MOTORING TORQUE LIMIT/CURRENT LIMIT..

2015

MINIMUM MOTORING TORQUE LIMIT

Active only in Vector Speed or Vector Torque motor control modes (9903 MOTOR CONTROL MODE = 0 or 1). Sets a minimum torque limit, whereby when the ACS255 is enabled, it will always attempt to maintain this torque on the motor at all times whilst operating.

WARNING : This parameter should be used with extreme care, as the drive output frequency will increase to achieve the torque level, and may exceed the selected speed reference.

0.0%

0.0 %…2017

2017

MAXIMUM MOTORING TORQUE LIMIT / CURRENT LIMIT

When operating in Vector Speed or Vector Torque motor control modes (9903 MOTOR CONTROL MODE = 0 or 1) this parameter defines the maximum torque limit or reference used by the drive in conjunction with parameter 2014 TORQUE CONTROL REFERENCE/LIMIT SOURCE . When operating in V/F Mode (9903 MOTOR CONTROL MODE = 2), this parameter defines the maximum output current the drive will provide to the motor before reducing the output frequency to attempt to limit the current.

200.0%

2015…500.00 %

2022

GENERATOR MODE MAX. TORQUE LIMIT (MAXIMUM REGENERATIVE TORQUE)

Active only in Vector Speed or Vector Torque motor control modes (parameter 9903 = 0,1,3). Sets the maximum regenerating torque allowed by the ACS255

200.0%

0.0…500 %

21 START/STOP

Start and Stop modes of the motor

2101

SPIN START ENABLE

Starting the drive connected to a rotating motor.

0 : Disabled

0 : DISABLED

1 : ENABLED

On start up the drive will attempt to determine if the motor is already rotating, and will begin to control the motor from its current speed. A short delay may be observed when starting motors which are not turning.

Page 48

Parameters in the Long parameter mode

Index

Name/Selection

Description

Def

2102

STOP MODE

Selects the motor stop function

0 : RAMP TO STOP

When the enable signal is removed, the drive will ramp to stop, with the rate controlled by parameter 2203 DECEL RAMP TIME as described above. In this mode, the drive brake transistor is disabled

1 : COAST TO STOP

When the enable signal is removed, the drive output is immediately disabled, and the motor will coast (freewheel) to stop. If the load can continue to rotate due to inertia, and the drive may possibly be re-enabled while the motor is still rotating, the spin start function (Parameter 2101 SPIN START ENABLE) should be enabled. In this mode, the drive brake transistor is disabled.

2 : RAMP TO STOP

When the enable signal is removed, the drive will ramp to stop, with the rate controlled by Parameter 2203 DECEL RAMP TIME as described above. The ACS255 Brake chopper is also enabled in this mode.

3 : COAST TO STOP

When the enable signal is removed, the drive output is immediately disabled, and the motor will coast (freewheel) to stop. If the load can continue to rotate due to inertia, and the drive may possibly be re-enabled while the motor is still rotating, the spin start function (Parameter 2101 SPIN START ENABLE) should be enabled. The drive brake chopper is enabled in this mode, however it will only activate when required during a change in the drive frequency setpoint, and will not activate when stopping.

2103

V/F MODE MAGNETISING PERIOD

This parameter is used to set up a minimum delay time for the magnetising current control in V/F mode when drive run signal is given. Too small a value may cause the drive to trip on over-current if the acceleration ramp is very short.

0…5000 ms

2106

DC INJECTION BRAKING VOLTAGE

Sets the amount of dc voltage as a percentage of the nominal voltage (9905 MOTOR RATED VOLTAGE) that is applied to the motor when a stop command is received. This parameter is enabled only for V/f control.

0.0

, 0.0…25.0 %

2108

START MODE SELECT / AUTOMATIC RESTART

Defines the behaviour of the drive relating to the enable digital input and also configures the Automatic Restart function.





Following Power on or reset, the drive will not start if Digital Input 1 remains closed. The Input must be closed after a power on or reset to start the drive.



Following a Power On or Reset, the drive will automatically start if Digital Input 1 is closed.

 to 

Following a trip, the drive will make up to 5 attempts to restart at 20 second intervals. The drive must be powered down to reset the counter. The numbers of restart attempts are counted, and if the drive fails to start on the final attempt, the drive will fault with, and will require the user to manually reset the fault

DANGER! “ modes allow the drive to Auto-start, therefore the impact on

System/Personnel safety needs to be considered.

2110

LOW FREQUENCY TORQUE BOOST

Boost current applied at start-up, as % of motor rated current (Parameter 9906 Motor Rated Current). The drive provides a boost function that can inject some current into the motor at low speed to help ensure the rotor alignment is maintained and to allow effective operation of the motor at lower speeds. To implement low speed boost, run the drive at the lowest frequency required by the application and increase boost levels to provide both required torque and smooth operation.

0.0 %

0.0…100.0 %

2111

TORQUE BOOST FREQUENCY LIMIT

Frequency range for applied boost current (Parameter 2110 LOW FREQUENCY TORQUE BOOST) as a % of motor rated frequency (Parameter 9907 Motor Rated Frequency). This sets the frequency cut-off point above which boost current is no longer applied to the motor.

0.0 %

0.0…50.0 %

2112

ZERO SPEED HOLDING TIME

Determines the time for which the drive output frequency is held at zero when stopping, before the drive output is disabled

0.2 s

0.0…60.0 s

22 ACCEL/DECEL

Acceleration and deceleration times

2202

ACCELERATION RAMP TIME

Acceleration ramp time from 0 to base speed (Parameter 9907 MOTOR RATED FREQUENCY) in seconds.

5.0 s

0.00…600.0 s

Time

2203

DECELERATION RAMP TIME

Deceleration ramp time from base speed (Parameter 9907 MOTOR RATED FREQUENCY) to standstill in seconds. When set to zero, fastest possible ramp time without trip is activated.

5.0 s

0.00…600.0 s

Time

Page 49

Parameters in the Long parameter mode

Index

Name/Selection

Description

Def

2206

2nd DECELERATION RAMP TIME

This parameter allows an alternative deceleration ramp down time to be programmed into the ACS255, which can be selected by digital inputs (dependent on the setting of Parameter 9902 DIGITAL INPUTS FUNCTION SELECT or selected automatically in the case of a mains power loss if parameter 2006 MAINS LOSS RIDE THROUGH / STOP CONTROL = 2.

0.00

0.00…240.0 s

When set to 0.0, the drive will coast to stop.

2210

FIELDBUS RAMP CONTROL

Selects whether the acceleration and deceleration ramps are controlled directly via the fieldbus, or by internal drive parameters 2202 ACCELERATION RAMP TIME and 2203 DECELERATION RAMP TIME.

0 : Disabled

Ramps are controlled from internal drive parameters.

1 : Enabled

Ramps are controlled directly by filedbus.

23 VECTOR CONTROL MODE OPTIMISE

2301

VECTOR SPEED CONTROLLER PROPORTIONAL GAIN

Sets the proportional gain value for the speed controller when operating in Vector Speed or Vector Torque motor control modes (parameter 9903 MOTOR CONTROL MODE = 0 ,1,3). Higher values provide better output frequency regulation and response. Too high a value can cause instability or even over current trips. For applications requiring best possible performance, the value should be adjusted to suit the connected load by gradually increasing the value and monitoring the actual output speed of the load until the required dynamic behaviour is achieved with little or no overshoot where the output speed exceeds the setpoint. In general, higher friction loads can tolerate higher values of proportional gain, and high inertia, low friction loads may require the gain to be reduced.

50.0 %

0.1…400.0 %

2302

VECTOR SPEED CONTROLLER INTEGRAL TIME CONSTANT

Sets the integral time for the speed controller. Smaller values provide a faster response in reaction to motor load changes, at the risk of introducing instability. For best dynamic performance, the value should be adjusted to suit the connected load.

0.050 s

0.000…2.000 s

2303

VECTOR SPEED CONTROL D GAIN

Sets the differential gain (%) for the speed controller in vector mode operation (parameter 9903 MOTOR CONTROL MODE = 0).

0.0 %

0.0…400.0 %

2305

SYSTEM INERTIA CONSTANT

System Load Inertia to Motor Inertia Ratio entered as H = (JTot / JMot). This value can normally be left at the default value (10) and is used by the drive control algorithms as a feed-forward control variable to provide optimum torque current to accelerate the load. Hence accurate setting of the inertia ratio will produce a better system response and dynamics. If the value is unknown then leave this set to the default value (10).

0…600

25 CRITICAL SPEEDS

Speed bands with which the drive is not allowed to operate. The Skip Frequency function is used to avoid the ACS255 operating at a certain output frequency, for example at a frequency which causes mechanical resonance in a particular machine.

2500

SKIP FREQUENCY BAND WIDTH

The ACS255 output frequency will ramp through the defined band at the rates set in parameter 2202 ACCELERATION RAMP TIME and parameter 2203 DECELERATION RAMP TIME respectively, and will not hold any output frequency within the defined band. If the frequency reference applied to the drive is within the band, the ACS255 output frequency will remain at the upper or lower limit of the band.

0.0 Hz/Rpm

0.0…2008

2501

SKIP FREQUENCY CENTRE POINT

Defines the center point of the skip frequency band, and is used in conjunction with Parameter 2500 SKIP FREQUENCY BAND WIDTH.

0.0 Hz/Rpm 2007…2008

Page 50

Parameters in the Long parameter mode

Index

Name/Selection

Description

Def

26 MOTOR CONTROL

Motor control variables

2601

ENERGY OPTIMIZER

Only active when enhanced V/F motor control mode is selected (parameter 9903 MOTOR CONTROL MODE = 2)

0 : Disabled

0 : DISABLED

1 : ENABLED

The Energy Optimizer attempts to reduce the overall energy consumed by the drive and motor when operating at constant speeds and light loads. The output voltage applied to the motor is reduced. The Energy Optimizer is intended for applications where the drive may operate for some periods of time with constant speed and light motor load, whether constant or variable torque.

2603

V/F MODE VOLTAGE BOOST

Voltage boost is used to increase the applied motor voltage at low output frequencies, in order to improve low speed and starting torque. Excessive voltage boost levels may result in increased motor current and temperature, and force ventilation of the motor may be required. An automatic setting () is also possible, whereby the ACS255 will automatically adjust this parameter based on the motor parameters measured during an autotune.

Drive rating dependant

2606

EFFECTIVE SWITCHING FREQUENCY

Effective power stage switching frequency. The range of settings available and factory default parameter setting depend on the drive power and voltage rating. Higher frequencies reduce the audible ‘ringing’ noise from the motor, and improve the output current waveform, at the expense of increased drive losses. Refer to section 11.5.3 on page 60 for further information regarding operation at higher switching frequency.

Drive Rating Dependent

4…32 kHz

2607

AUTOMATIC THERMAL MANAGEMENT

Drive will automatically reduce the output switching frequency to this value at higher heat sink temperature, to reduce the risk of an over temperature trip.

4kHz

4…32kHz

2610

V/F CHARACTERISTIC ADJUSTMENT VOLTAGE

Used in conjunction with parameter 2611

0 %

0 %…100% of 9905

2611

V/F CHARACTERISTIC ADJUSTMENT FREQUENCY

When operating in V/F mode (Parameter 9903 = 2), this parameter in conjunction with parameter 2610 sets a frequency point at which the voltage set in Parameter 2610 is applied to the motor. Care must be taken to avoid overheating and damaging the motor when using this feature.

0 %

0.0 %…100% of 9907

30 FAULT FUNCTIONS

Programmable protection functions

3005

THERMAL OVERLOAD VALUE RETENTION

0 : DISABLED

Alternative means of protecting the motor from thermal overload must be applied (e.g. PTC thermistor)

1 : ENABLED

The drive will retain the motor thermal overload value following a mains power cycle.

3018

COMMUNICATION LOSS ACTION

Controls the behaviour of the drive following a loss of communications as determined by the above parameter setting.

0 : Trip & Coast To Stop

0 : TRIP & COAST TO STOP

1 : RAMP TO STOP THEN TRIP

2 : RAMP TO STOP ONLY (NO TRIP)

3 : RUN AT PRESET SPEED 4

Runs at the value set in parameter 1205 PRESET / JOG FREQUENCY / SPEED 4.

3019

COMMUNICATIONS LOSS TIMEOUT

Sets the watchdog time period for the communications channel. If a valid telegram is not received by the ACS255 within this time period, the drive will assume a loss of communications has occurred and react as selected below. Setting to zero disables the function.

1.0

0.0…5.0 s

31 AUTOMATIC RESET

Automatic fault reset. Automatic resets are possible only for certain fault types and when the automatic reset function is activated.

3103

AUTO RESET TIME DELAY

Sets the delay time which will elapse between consecutive reset attempts when Auto Resest is enabled in Parameter 2108 START MODE SELECT / AUTOMATIC RESTART.

1…60 s

20 s

Page 51

Parameters in the Long parameter mode

Index

Name/Selection

Description

Def

32 SUPERVISION

Signal supervision. The drive monitors whether certain user selectable variables are within the user-defined limits. The user may set limits for speed, current etc. Supervision status can be monitored with relay output. See parameter group 14 RELAY OUTPUTS.

3202

ADJUSTABLE THRESHOLD 1 LOWER LIMIT (ANALOG OUTPUT 1 / RELAY OUTPUT 1)

Used in conjunction with some settings of parameter 1501 ANALOG OUTPUT 1 (TERMINAL 8) FUNCTION SELECT & parameter 1401 USER RELAY 1 OUTPUT (TERMINALS 14, 15 & 16) FUNCTION SELECT.

0.0 %

0.0 %…3203

3203

ADJUSTABLE THRESHOLD 1 UPPER LIMIT (ANALOG OUTPUT 1 / RELAY OUTPUT 1)

Used in conjunction with some settings of parameter 1501 ANALOG OUTPUT 1 (TERMINAL 8) FUNCTION SELECT & parameter 1401 USER RELAY 1 OUTPUT (TERMINALS 14, 15 & 16) FUNCTION SELECT.

100.0 %

3202...200.0 %

3205

ADJUSTABLE THRESHOLD 1 LOWER LIMIT (ANALOG OUTPUT 2 / RELAY OUTPUT 2)

Used in conjunction with some settings of Parameters 1507 ANALOG OUTPUT 2 (TERMINAL

11) FUNCTION SELECT & 1402 USER RELAY 2 OUTPUT (TERMINALS 17 & 18) FUNCTION

SELECT.

0.0 %

0.0…3206

3206

ADJUSTABLE THRESHOLD 1 UPPER LIMIT (ANALOG OUTPUT 2 / RELAY OUTPUT 2)

Used in conjunction with some settings of Parameter 1507 ANALOG OUTPUT 2 (TERMINAL

11) FUNCTION SELECT & 1402 USER RELAY 2 OUTPUT (TERMINALS 17 & 18) FUNCTION

SELECT.

100.0 %

3205…200.0%

33 INFORMATION

Firmware update.

3399

FIRMWARE UPGRADE

ABB Internal use only.

34 PANEL DISPLAY

Selection of actual signals to be displayed on the drives front panel e.g. to display conveyer speed in feet per second based on the output frequency

3400

DISPLAY SCALING FACTOR

Allow the user to display an alternative output unit scaled from an existing parameter. This function is disabled if set to 0.

0.000

-30.000…30.000

3405

DISPLAY SCALING SOURCE

If parameter 3400 DISPLAY SCALING FACTOR set >0, the variable selected in parameter 3405 DISPLAY SCALING SOURCE is multiplied by the factor entered in 3400 DISPLAY SCALING FACTOR, and displayed whilst the drive is running, with a ‘c’ to indicate the customer scaled units.

0 : Motor Speed

Hertz/Rpm

1 : Motor Current

Ampere

2 : Analog Input 2

40 PROCESS PI SETUP

Process PI control parameter set

4001

PI PROPORTIONAL GAIN

PI Controller Proportional Gain. Higher values provide a greater change in the drive output frequency in response to small changes in the feedback signal. Too high a value can cause instability

1.0

0.0…30.0

4002

PI INTEGRAL TIME CONSTANT

PI Controller Integral Time. Larger values provide a more damped response for systems where the overall process responds slowly

1.0 s

0.0…30.0 s

4005

PI Operating Mode

0 : DIRECT OPERATION

Use this mode if an increase in the motor speed should result in an increase in the feedback signal

1 : INVERSE OPERATION

Use this mode if an increase in the motor speed should result in a decrease in the feedback signal

4010

PI Reference (Setpoint) Source Select

Selects the source for the PI Reference / Setpoint

Digital Preset Setpoint. Parameter 4011 PI Digital Reference (Setpoint) is used

Analog Input 1 Setpoint

Analog Input 2 Setpoint

4011

PI Digital Reference (Setpoint)

When parameter 4010 PI REFERENCE (SETPOINT) SOURCE SELECT = 0, this parameter sets the preset digital reference (setpoint) used for the PI Controller

0 %

0.0…100.0 %

4016

PI Feedback Signal Source Select

Analog Input 2

1 Analog Input 1

Page 52

Parameters in the Long parameter mode

Index

Name/Selection

Description

Def

45 ENERGY METER RESET

4509

ENERGY CONSUMPTION (KWH) Meter Reset

0 No Function

1 Setting to 1 resets internal kWh meter to zero (as displayed in parameter 0115 ENERGY

CONSUMPTION KWH METER and parameter 0141 ENERGY CONSUMPTION MWH METER.

53 COMMUNICATIONS PARAMETERS

5302

DRIVE FIELDBUS ADDRESS

Sets the fieldbus address for the ACS255

0…63

5303

Modbus RTU Baud Rate

Sets the baud rate when Modbus RTU communications are used

115.2 kbps

9.6…115.2 kbps

5304

Modbus Data Format

Sets the expected Modbus telegram data format.

 

No Parity, 1 stop bit



No parity, 2 stop bits



Odd parity, 1 stop bit



Even parity, 1 stop bit

5305

CAN Open Baud Rate

Sets the baud rate when CAN Open communications are used

500 kbps

125…1000 kbps

99 START-UP DATA

Definition of motor set-up data.

9902 Digital Inputs

Function Select

Defines the function of the digital inputs depending on the control mode setting in Parameter 1103 PRIMARY COMMAND SOURCE MODE.

9903

Motor Control Mode

Selects the motor control method. An autotune must be performed if setting 0, 1 or 3 is used.

2: Speed Control (Enhanced V/F)

0: Speed Control with Torque Limit (vector)

1: Torque Control with Speed Limit (vector)

2: Speed Control (Enhanced V/F)

3 : PM Vector

4 : Reserved

9905

MOTOR RATED VOLTAGE

This parameter should be set to the rated (nameplate) voltage of the motor (Volts).

Drive Rating

Dependent

0…660V

Voltage Note : The stress on the motor insulation is always dependant on the drive supply voltage. This also applies in the case where the motor voltage rating is lower than the rating of the drive and the supply of the drive.

9906

MOTOR RATED CURRENT

This parameter should be set to the rated (nameplate) current of the motor.

Drive Rating

Dependent

0.2* drive rated output

current…1.0* drive rated

output current

Current

9907

MOTOR RATED FREQ

This parameter should be set to the rated (nameplate) frequency of the motor

60Hz

25…500Hz

Frequency

9908

MOTOR RATED SPEED

This parameter can optionally be set to the rated (nameplate) rpm of the motor. When set to the default value of zero, all speed related parameters are displayed in Hz, and the slip compensation for the motor is disabled. Entering the value from the motor nameplate enables the slip compensation function, and the ACS255 display will now show motor speed in estimated rpm. All speed related parameters, such as Minimum and Maximum Speed, Preset Speeds etc. will also be displayed in Rpm.

0 Rpm

0…30000 Rpm

9910

MOTOR PARAMETER AUTO-TUNE ENABLE

Drive measures the motor parameters for optimum control and efficiency. Following completion of the autotune.

0 : DISABLE

1: ENABLE

Drive immediately carries out a non-rotating autotune, parameter 9910 MOTOR PARAMETER AUTO-TUNE ENABLE returns to 0 when completed.

9915

Motor Power Factor Cos Ø

When operating in Vector Speed or Vector Torque motor control modes, this parameter must be set to the motor nameplate power factor

0.00…0.99

Page 53

Parameters in the Long parameter mode

Index

Name/Selection

Description

Def

112 Vector mode advanced motor

data

Only valid when parameter 9903 Motor Control Mode is 0,1, 3. WARNING! The following parameters are used internally by the drive to provide optimum possible motor control. Incorrect setting of the parameters can result in poor performance and unexpected behaviour of the motor. Adjustments should only be carried out by experienced users who fully understand the functions of the parameters.

11201

MOTOR STATOR RESISTANCE (Rs)

Motor stator resistance value measured during the autotune.

11202

MOTOR ROTOR RESISTANCE (Rr)

Phase to phase rotor resistance value in ohms.

11203

MOTOR STATOR INDUCTANCE (Lsd)

For induction motors: phase stator inductance value.

11204

MOTOR MAGNETISING CURRENT (Id rms)

For induction motors: magnetizing / no load current. Before Auto-tune, this value is approximated to 60% of motor rated current (parameter 9906 MOTOR RATED CURRENT), assuming a motor power factor of 0.8.

11205

MOTOR LEAKAGE COEFFICIENT (Sigma)

Motor leakage inductance coefficient

11207

Quick Rs Measurement Enable

Allows the stator resistance parameter 11201 MOTOR STATOR RESISTANCE to be adapted during normal operation.

0 : DISABLE

1 : ENABLE

11208

MOTOR PARAMETER ADAPTATION ENABLE

Allows the stator inductance parameter 11203 MOTOR STATOR INDUCTANCE to be adapted during normal operation.

0 : DISABLE

1 : ENABLE

11209

PULSE WIDTH MINIMUM LIMIT

This parameter is used to limit the minimum output pulse width, which can be used for long cable applications. Increasing the value of this parameter will reduce the risk of over-current trips on long motor cables, but will also reduce the maximum available output motor voltage for a given input voltage.

0…500

1602

Parameter Access Unlock

0…65535

1603

Parameter Access code

0…65535

9.5. Preventing un-authorized parameter editing.

This function can be used to prevent an un-authorized person from changing the drive parameter values; this function is disabled when delivered

from the factory.

Relevant Parameters

Locking Parameter Access

1) Go to Parameter 1603 (Long Parameter group) and enter in your chosen parameter access code.

2) Press the button to exit and parameter 1603 will then be hidden and all parameters will be “Read only” (except for Parameter

1602 which will remain “Read Write”.

Unlocking Parameter Access

1) Enter into Parameter 1602 the same value as 1603 (as chosen in step 1 above).

2) All parameters will now be “Read Write” and parameter 1603 will become visible and show the value which was originally

programmed as the parameter access code.

3) To disable this feature set parameter 1603 PARAMETER ACCESS CODE to zero and then 1602 PARAMETER ACCESS UNLOCK to

zero.

Page 54

CAN-

CAN+

0 Volt

Remote Keypad / PC Connection -

Remote Keypad / PC Connection +

+24 Volt Remote Keypad Power Supply

RS 485- Modbus RTU

RS 485+ Modbus RTU

Command 03 – Read Holding Registers

Master Telegram

Length

Slave Response

Length

Slave Address

Byte Slave Address

Byte

Function Code (03)

Byte Function Code (03)

Byte

1st Register Address

Bytes

Byte Count

Byte

No. Of Registers

Bytes

1st Register Value

Bytes

CRC Checksum

Bytes

2nd Register Value

Bytes

Etc...

CRC Checksum

Bytes

Command 06 – Write Single Holding Register

Master Telegram

Length

Slave Response

Length

Slave Address

Byte Slave Address

Byte

Function Code (06)

Byte Function Code (06)

Byte

Bytes

Value

Bytes

CRC Checksum

Bytes

CRC Checksum

Bytes

10. Serial communications

10.1. RJ45 Connector Pin Assignment

ACS255 has an RJ45 connector on the front of the control panel. This connector allows the user to set up a drive network via a wired connection. The connector contains multiple interfaces for different communication protocols.

 PC and peripheral connection only  Modbus RTU  CANBus

The Remote keypad connection is always available, and can be used simultaneously with other interfaces, however only one other interface may be used, e.g. If Modbus RTU is in use, CAN is disabled.

The electrical signal arrangement of the RJ45 connector is shown as follows:

10.2. Modbus RTU Communications

10.2.1. Modbus Telegram Structure

The ACS255 supports Master / Slave Modbus RTU communications, using the 03 Read Holding Registers and 06 Write Single Holding Register commands. Many Master devices treat the first Register address as Register 0; therefore it may be necessary to convert the Register Numbers detailed in section 10.2.4 by subtracting 1 to obtain the correct Register address. The telegram structure is as follows.

Page 55

Upper Byte

Lower Byte

Read

Write

Notes

Command Control Word

R/W

Command control word used to control the ACS255 when operating with Modbus RTU. The Control Word bit functions are as follows :Bit 0 : Run/Stop command. Set to 1 to enable the drive. Set to 0 to stop the drive. Bit 1 : Fast stop request. Set to 1 to enable drive to stop with 2nd deceleration ramp. Bit 2 : Reset request. Set to 1 in order to reset any active faults or trips on the drive. This bit must be reset to zero once the fault has been cleared. Bit 3 : Coast stop request. Set to 1 to issue a coast stop command.

Command Speed Reference

R/W

Setpoint must be sent to the drive in Hz to one decimal place, e.g. 500 = 50.0Hz

Command Torque Reference

R/W

Setpoint must be sent to the drive in % to one decimal place, e.g. 2000 = 200.0%

Command Ramp times

R/W

This register specifies the drive acceleration and deceleration ramp times used when Fieldbus Ramp Control is selected (2210 FIELDBUS RAMP CONTROL = 1) irrespective of the setting of 1103 PRIMARY COMMAND SOURCE MODE. The input data range is from 0 to 60000 (0.00s to 600.00s)

Error code

Drive status

This register contains 2 bytes. The Lower Byte contains an 8 bit drive status word as follows :Bit 0 : 0 = Drive Disabled (Stopped), 1 = Drive Enabled (Running) Bit 1 : 0 = Drive Healthy, 1 = Drive Tripped The Upper Byte will contain the relevant fault number in the event of a drive trip. Refer to section 13.1 on page 62 for a list of fault codes and diagnostic information

Output Frequency

Output frequency of the drive to one decimal place, e.g.123 = 12.3 Hz

Output Current

Output current of the drive to one decimal place, e.g.105 = 10.5 Amps

Output Torque

Motor output torque level to one decimal place, e.g. 474 = 47.4 %

Output Power

Output power of the drive to two decimal places, e.g.1100 = 11.00 kW

Digital Input Status

Represents the status of the drive inputs where Bit 0 = Digital Input 1 etc.

Analog 1 Level

Analog Input 1 Applied Signal level in % to one decimal place, e.g. 1000 = 100.0%

Analog 2 Level

Analog Input 2 Applied Signal level in % to one decimal place, e.g. 1000 = 100.0%

Pre Ramp Speed Reference

Internal drive frequency setpoint

DC bus voltages

Measured DC Bus Voltage in Volts

Drive temperature

Measured Heatsink Temperature in °C

10.2.2. Modbus Control & Monitoring Registers

The following is a list of accessible Modbus Registers available in the ACS255.

 When Modbus RTU is configured as the Fieldbus option, all of the listed registers can be accessed.  Registers 1 and 2 can be used to control the drive providing that Modbus RTU is selected as the primary command source (1103

PRIMARY COMMAND SOURCE MODE = 4).

 Register 3 can be used to control the output torque level providing that

o The drive is operating in Vector Speed or Vector Torque motor control modes (9903 MOTOR CONTROL MODE = 1 or 2). o The torque controller reference / limit is set for ‘Fieldbus’ (2014 TORQUE CONTROL REFERENCE / LIMIT SOURCE = 3).

 Register 4 can be used to control the acceleration and deceleration rate of the drive providing that Fieldbus Ramp Control is enabled

(2210 FIELDBUS RAMP CONTROL = 1).

 Registers 6 to 24 can be read regardless of the setting of parameter 1103 PRIMARY COMMAND SOURCE MODE.

10.2.3. Modbus Parameter Access

All User Adjustable parameters are accessible by Modbus, except those that would directly affect the Modbus communications, e.g.

 5302 DRIVE FIELDBUS ADDRESS  5303 Modbus RTU Baud Rate  5304 Modbus Data Format  5305 CAN Open Baud Rate

All parameter values can be read from the drive and written to, depending on the operating mode of the drive – some parameters cannot be changed whilst the drive is enabled for example.

When accessing a drive parameter via Modbus, the Register number for the parameter is in the order of the long parameter list (See page 43 with the first register being 129 (Parameter 0401 TRIP HISTORY LOG).

Modbus RTU supports sixteen bit integer values, hence where a decimal point is used in the drive parameter; the register value will be multiplied by a factor of ten, E.g. Read Value of parameter 2008 = 500, therefore this is 50.0Hz.

For further details on communicating with ACS255 using Modbus RTU, please refer to your local ABB representative.

Page 56

10.2.4. Modbus Parameter Register Map

Parameter No

Description

129

0401

TRIP HISTORY LOG

130

1100

KEYPAD MODE RESTART FUNCTION

131

1103

PRIMARY COMMAND SOURCE MODE

132

1202

PRESET / JOG FREQUENCY / SPEED 1

133

1203

PRESET / JOG FREQUENCY / SPEED 2

134

1204

PRESET / JOG FREQUENCY / SPEED 3

135

1205

PRESET / JOG FREQUENCY / SPEED 4

136

1300

ANALOG INPUT 1 SIGNAL FORMAT

137

1301

ANALOG INPUT 1 OFFSET

138

1302

ANALOG INPUT 1 SCALING

139

1304

ANALOG INPUT 2 SIGNAL FORMAT

140

1305

ANALOG INPUT 2 OFFSET

141

1307

ANALOG INPUT 2 SCALING

142

1401

OUTPUT RELAY 1 FUNCTION SELECT

143

1402

OUTPUT RELAY 2 FUNCTION SELECT

144

1404

RELAY OUTPUT HYSTERESIS CONTROL

145

1501

ANALOG OUTPUT 1 FUNCTION SELECT

146

1504

ANALOG OUTPUT 1 FORMAT

147

1507

ANALOG OUTPUT 2 FUNCTION SELECT

148

1508

ANALOG OUTPUT 2 FORMAT

149

1602

PARAMETER ACCESS UNLOCK

150

1603

PARAMETER ACCESS CODE DEFINITION

151

2005

OVER VOLTAGE CURRENT LIMIT

152

2006

MAINS LOS RIDE THROUGH/STOP CONTROL

152

2007

MINIMUM FREQUENCY / SPEED LIMIT

154

2008

MAXIMUM FREQUENCY / SPEED LIMIT

155

2014

TORQUE CONTROL REFERENCE/LIMIT SOURCE

156

2015

MINIMUM MOTORING TORQUE LIMIT

157

2017

MAXIMUM MOTORING TORQUE LIMIT/CURRENT LIMIT

158

2022

GENERATOR MODE MAX. TORQEU LIMIT (MAXIMUM REGENERATIVE TORQUE)

159

2101

SPIN START ENABLE

160

2102

STOP MODE

161

2103

V/F MODE MAGNETISING PERIOD

162

2106

DC INJECTION BRAKING VOLTAGE

163

2108

START MODE SELECT/AUTOMATIC RESTART

164

2110

LOW FREQUENCY TORQUE BOOST

165

2111

TORQUE BOOST FREQUENCY LIMIT

166

2112

ZERO SPEED HOLDING TIME

167

2202

ACCELERATION RAMP TIME

168

2203

DECELERATION RAMP TIME

169

2206

2ND DECELERATION RAMP TIME (FAST STOP)

170

2210

FIELDBUS RAMP CONTROL

171

2301

VECTOR SPEED CONTROLLER PROPORTIONAL GAIN

172

2302

VECTOR SPEED CONTROLLER INTEGRAL TIME CONSTANT

173

2303

VECTOR SPEED CONTROLLER D GAIN

174

2305

SYSTEM INERTAI CONSTANT

175

2500

SKIP FREQUENCY HYSTERESIS BAND

176

2501

SKIP FREQUENCY CENTRE POINT

177

2601

ENERGY OPTIMIZER

178

2603

V/F MODE VOLTAGE BOOST

179

2606

EFFECTIVE SWITCHING FREQUENCY

180

2607

AUTOMATIC THERMAL MANAGEMENT

181

2610

V/F CHARACTERISTIC ADJUSTMENT VOLTAGE

182

2611

V/F CHARACTERISTIC ADJUSTMENT FREQUENCY

183

3005

THERMAL OVERLOAD VALUE RETENTION

184

3018

COMMUNICATION LOSS ACTION

185

3019

COMMUNICATION LOSS TIMEOUT

186

3103

AUTO RESET TIME DELAY

187

3202

ADJUSTABLE THRESHOLD 1 LOWER LIMIT (ANALOG OUTPUT 1/RELAY OUTPUT 1)

188

3203

ADJUSTABLE THRESHOLD 1 UPPER LIMIT (ANALOG OUTPUT 1/RELAY OUTPUT 1)

189

3205

ADJUSTABLE THRESHOLD 1 LOWER LIMIT (ANALOG OUTPUT 1/RELAY OUTPUT 2)

190

3206

ADJUSTABLE THRESHOLD 1 UPPER LIMIT (ANALOG OUTPUT 1/RELAY OUTPUT 2)

191

3399

FIRMWARE UPGRADE (ABB INTERNAL USE ONLY)

192

3400

DISPLAY SPEED SCALING FACTOR

193

3405

DISPLAY SCALING SOURCE

194

4001

PI PROPORTIONAL GAIN

195

4002

PI INTEGRAL TIME CONSTANT

196

4005

PI OPERATING MODE

197

4010

PI REFERENCE (SETPOINT) SOURCE SELECT

Page 57

Parameter No

Description

198

4011

PI DIGITAL REFERENCE (SETPOINT)

199

4016

PI FEEDBACK SIGNAL SOURCE SELECT

200

4509

ENERGY CONSUMPTION METER

201

5302

DRIVE FIELDBUS ADDRESS

202

5303

MODBUS RTU BAUD RATE

203

5304

MODBUS DATA FORMAT

204

5305

CANOPEN BAUD RATE

205

9902

DIGITAL INPUTS FUNCTION SELECT

206

9903

MOTOR CONTROL MODE

207

9905

MOTOR RATED VOLTAGE

208

9906

MOTOR RATED CURRENT

209

9907

MOTOR RATED FREQUENCY

210

9908

MOTOR RATED SPEED

211

9910

MOOTR PARAMETER AUTO-TUNE ENABLE

212

11201

MOTOR STATOR RESISTANCE

213

11202

MOTOR ROTOR RESISTANCE

214

11203

MOTOR STATOR INDUCTANCE

215

11204

MOTOR MAGNETISING CURRENT

216

11205

MOTOR LEAKAGE COEFFICIENT

217

11207

QUICK RS MEASURMENT ENABLE

218

11208

MOOR PARAMETER ADAPTION ENABLE

219

11209

PULSE WIDTH MINIMUM LIMIT

Page 58

Model Number

Power

(HP)

Nominal

Input

Current (A)

Nominal

Input

Current

With 3% line

choke

(A)

Fuse

(A)

Supply and PE

Cable Size

Nominal

Output

Current

(A)

Motor Cable

Size

Maximum

Motor

Cable

Length

Recommended

Brake

Resistance

(Ω)

Frame

Size

Class

CC or J

mm2

AWG

mm2

AWG

Mtrs

ACS255-03U-02A1-6..

2.7

2.1

10 6 1.5

2.1

1.5

100

600

ACS255-03U-03A1-6..

3.7

3.1

10 6 1.5

3.1

1.5

100

300

ACS255-03U-04A1-6..

4.8

4.1

1.5

4.1

1.5

100

200

ACS255-03U-06A5-6..

7.1

6.5

1.5

6.5

1.5

100

150

ACS255-03U-09A0-6..

7.5

10.2

9.0

2.5

12 9 1.5

100

ACS255-03U-12A0-6..

14.4

20 4 10

1.5

100

ACS255-03U-17A0-6..

19.1

25 4 8

2.5

100

ACS255-03U-22A0-6..

23.6

10 8 22 4 10

100

Note

 Input current measurements are at 575VAC at drive nominal output current.  Ratings shown above apply to 40°C Ambient temperature. For derating information, refer to section 11.5.1 on page 60.  The maximum motor cable length stated applies to using a shielded motor cable. When using an unshielded cable, the maximum cable length

limit may be increased by 50%. When using the ABB Drives recommended output choke, the maximum cable length may be increased by 100%

 The PWM output switching from any inverter when used with a long motor cable length can cause an increase in the voltage at the motor

terminals, depending on the motor cable length and inductance. The rise time and peak voltage can affect the service life of the motor. ABB Drives recommend using an output choke for motor cable lengths of 50m or more to ensure good motor service life

 For UL compliant installation, use Copper wire with a minimum insulation temperature rating of 70°C, UL Class CC or Class J Fuses

11. Technical Data

11.1. Environmental

Ambient temperature range: Operational : -10 … 50 C (Refer to section 11.5 for Derating Information) Storage and Transportation : -40 C … 60 C Max altitude for rated operation : 1000m (Refer to section 11.5 for derating Information) Relative Humidity : < 95% (non condensing) Note : Drive must be Frost and moisture free at all times Installation above 2000m is not UL approved

11.2. Input/Output Current ratings and fuses

The following tables provide the output current rating information for the various ACS255 models. ABB Drives always recommend that selection of the correct ACS255 is based upon the motor full load current at the incoming supply voltage.

Cable dimensioning for nominal rated currents is shown in the table below together with the corresponding fuse types for short-circuit protection of the input power cable.

The rated fuse currents given in the table are the maximums for the mentioned fuse types. If smaller fuse ratings are used, check that the fuse rms current rating is larger than the nominal input current. If 150% output power is needed, multiply nominal input current by 1.5.

Check that the operating time of the fuse is below 0.5 seconds. The operating time depends on the fuse type, the supply network impedance as well as the cross-sectional area, material and length of the supply cable. In case the 0.5 seconds operating time is exceeded with the gG or T fuses, ultra rapid (aR) fuses in most cases reduce the operating time to an acceptable level.

Note: Larger fuses must not be used when the input power cable is selected according to this table.

11.3. Overload

The ACS255 can deliver 150% of the drive nominal output current for 60 seconds and 200 % for 3 seconds.

Page 59

Input Power Supply Requirements

Supply Voltage

500-600 Volts, + / - 10% variation allowed, Maximum 660 Volts RMS

Imbalance

Maximum 3% voltage variation between phase – phase voltages allowed

All ACS255 units have phase imbalance monitoring. A phase imbalance of > 3% will result in the drive tripping. For input supplies which have supply imbalance greater than 3% (typically the Indian sub- continent & parts of Asia Pacific including China) ABB Drives recommends the installation of input line reactors. Alternatively.

Frequency

50 – 60Hz + / - 5% Variation

Short Circuit Capacity

Voltage Rating

Min HP

Max HP

Maximum supply short-circuit current

600

100kA rms (AC)

All the drives in the above table are suitable for use on a circuit capable of delivering not more than the above specified maximum short-circuit Amperes symmetrical with the specified maximum supply voltage.

Incoming power supply connection must be according to section 5.9

All ACS255 units are intended for indoor installation within controlled environments which meet the condition limits shown in section 11.1 on page 59.

Branch circuit protection must be installed according to the relevant national codes. Fuse ratings and types are shown in section 11.2 on page

59.

Suitable Power and motor cables should be selected according to the data shown in section 11.2 on page 59.

Power cable connections and tightening torques are shown in section 4.4 on page 15.

ACS255 provides motor overload protection in accordance with the National Electrical Code (US).

 Where a motor thermistor is not fitted, or not utilised, Thermal Overload Memory Retention must be enabled by setting 3005

THERMAL OVERLOAD VALUE RETENTION = 1

 Where a motor thermistor is fitted and connected to the drive, connection must be carried out according to the information shown in

section 5.7.2

Enclosure Type

Maximum Temperature

Without Derating.

(UL Approved)

Derate by

Maximum Permissible Operating

Ambient Temperature with

Derating (Non UL Approved)

IP20

50°C / 122°F

N/A

50°C

IP66

40°C / 104°F

2.5% per °C (1.8°F)

50°C

Enclosure Type

Maximum Altitude

Without Derating

Derate by

Maximum Permissible

(UL Approved)

Maximum Permissible

(Non-UL Approved)

IP20

1000m / 3281ft

1% per 100m / 328 ft

2000m / 6562 ft

4000m / 13123 ft

IP66

1000m / 3281ft

1% per 100m / 328 ft

2000m / 6562 ft

4000m / 13123 ft

Switching Frequency (Where available)

Enclosure Type

4kHz

8kHz

12kHz

16kHz

24kHz

32kHz

IP20

N/A

20%

30%

40%

50%

IP66

N/A

10%

25%

35%

50%

11.4. Additional Information for UL Approved Installations

ACS255 is designed to meet the UL requirements. In order to ensure full compliance, the following must be fully observed.

11.5. Derating Information

Derating of the drive maximum continuous output current capacity is required when

 Operating at ambient temperature in excess of 40°C / 104°F  Operating at Altitude in excess of 1000m/ 3281 ft  Operation with Effective Switching Frequency higher than the minimum setting

The following derating factors should be applied when operating drives outside of these conditions

11.5.1. Derating for Ambient Temperature

11.5.2. Derating for Altitude

11.5.3. Derating for Switching Frequency

11.5.4. Example of applying Derating Factors

If a 5 HP IP66 drive is to be used at an altitude of 2000 metres above sea level, with 12kHz switching frequency and 45°C ambient temperature. From the table above, we can see that the rated current of the drive is 9.5 Amps at 40°C, Firstly, apply the switching frequency derating, 12kHz, 25% derating

9.5 Amps x 75% = 7.1 Amps Now, apply the derating for higher ambient temperature, 2.5% per °C above 40°C = 5 x 2.5% = 12.5%

7.1 Amps x 87.5% = 6.2 Amps Now apply the derating for altitude above 1000 metres, 1% per 100m above 1000m = 10 x 1% = 10%

7.9 Amps x 90% = 5.5 Amps continuous current available. If the required motor current exceeds this level, it will be necessary to either:

- Reduce the switching frequency selected

- Use a higher power rated drive and repeat the calculation to ensure sufficient output current is available.

Page 60

Action

Additional Information

 Enable PMSM motor control

Set 9903 to 3

 Enter motor backEMF voltage value

Enter Back EMF value into 9905

The phase to phase value (at motor rated Speed) should be obtained from the motor nameplate or datasheet. If the voltage is given as a proportional value, such as 103V/1000 rpm in a 3000rpm motor, set 309V here. Sometimes the value is given as the peak value. In this case divide the value by the square root of 2 (1.41).

Note: Incorrect value can result in abnormal motor operation (motor vibration)

 Enter Motor Rated Current

Enter value into 9906 Obtained from Motor nameplate (Amps).

 Enter Motor Rated Frequency

Enter value into 9907

Note : The drive uses 9907 to calculate the number of motor pole pairs.

Frequency (Hz) = speed (rpm) x (number of pole pairs) / 60

 Enter Motor Rated Speed

Enter value into 9908

Obtained from Motor nameplate (rpm)

Speed (rpm) = frequency (Hz) x 60 / (number of pole pairs)

 Set Motor Switching Frequency

Set 2606 to 16kHz

16kHz provides optimum motor control.

 Set Motor boost values

Set 2110 to 25%

Boost Current Level

Set 2111 to 10%

Boost Frequency

Action

Additional Information

 Close Safe Torque off input connections

1 2 3 4 5 6 7 8 9 10 11 12 13

Safety relay

Drive should now show 

 Enable Motor Auto-tune

Set 9910 to a 1 and press the button.

The display will show . (Test procedure may take several minutes to complete).

Once the Auto-tune is completed 9910 will return to 0 and the display will show .

Note: Motor Auto-tune will need to be repeated if the motor, motor cables, motor parameters or drive control mode is changed in 9903.

12.1.3. Troubleshooting

Observation

Action

Rotor not orientating on start up

Increase 2103 (Current Magnetising time)

Long delay following Rotor orientation on start up

Decrease 2103 (Current Magnetising time)

Poor torque performance at low speed Increase value in 2110 (Boost current level) and 2111 (Torque boost frequency limit)

Suitable starting values are 25% (2110) and 10% (2111)

Motor Vibration/trips/Cogging at low speed

Check correct settings of motor nameplate data. Check correct value of 9905 (Motor Back EMF voltage). Reduce value of 2301 (Vector Speed Gain)(As much as 50% reduction in some instances)



Check correct settings of motor nameplate data. Check correct value of 9905 (Motor Back EMF voltage). Check Correct setting of 2110 and 2111.

Care should be taken not to apply to high of a value in 2110 and 2111 as excess motor heating may result.

12. Appendix: Permanent magnet synchronous motors (PMSMs)

With PMSMs special attention must be paid on setting the motor nominal values correctly in parameter group 99 START-UP DATA. It is important that the nominal back-emf of the motor is available, further to ensure good performance a MOTOR PARAMETER AUTO-TUNE (9910=1) must be performed.

The following table lists the basic parameter settings needed for permanent magnet synchronous motors.

12.1.1. PMSM Motor nameplate data entry.

12.1.2. PMSM Motor Auto-tune.

A Motor Auto-tune must be carried out in order to measure the motor electrical characteristics, during the Auto-tune test brakes will be applied by the drive (unless controlled by other means).

Page 61

Fault Code

No.

Description

Corrective Action



No Fault

Displayed in Parameter 0401 if no faults are recorded in the log



Brake channel over current

Ensure the connected brake resistor is above the minimum permissible level for the drive – refer to the ratings shown in section 11.2. Check the brake resistor and wiring for possible short circuits.



Brake resistor overload

The drive software has determined that the brake resistor is overloaded, and trips to protect the resistor. Always ensure the brake resistor is being operated within its designed parameter before making any parameter or system changes. To reduce the load on the resistor, increase deceleration the time, reduce the load inertia or add further brake resistors in parallel, observing the minimum resistance value for the drive in use.



Instantaneous over current on drive output. Excess load on the motor.

Fault Occurs on Drive Enable

Check the motor and motor connection cable for phase – phase and phase – earth short circuits. Check the load mechanically for a jam, blockage or stalled condition Ensure the motor nameplate parameters are correctly entered in parameter 9905, 9906, and

9907.

If operating in Vector mode (Parameter 9903 – 0 or 1), also check the motor power factor in parameter 9915 and ensure an autotune has been successfully completed for the connected motor. Reduced the Boost voltage setting in parameter 2603 Increase the ramp up time in parameter 2202 If the connected motor has a holding brake, ensure the brake is correctly connected and controlled, and is releasing correctly

Fault Occurs When Running

If operating in Vector mode (parameter 9903 – 0,1,3), reduce the speed loop gain in parameter 2301



Drive has tripped on overload after delivering >100% of value in parameter 9906 for a period of time.

Check to see when the decimal points are flashing (drive in overload) and either increase acceleration rate or reduce the load. Check motor cable length is within the limit specified for the relevant drive in section 10.2 Ensure the motor nameplate parameters are correctly entered in parameter 9905, 9906, and

9907.

If operating in Vector mode (Parameter 9903 – 0 or 1), also check the motor power factor in parameter 9915 and ensure an autotune has been successfully completed for the connected motor. Check the load mechanically to ensure it is free, and that no jams, blockages or other mechanical faults exist



Hardware Over Current

Check the wiring to motor and the motor for phase to phase and phase to earth short circuits. Disconnect the motor and motor cable and retest. If the drive trips with no motor connected, it must be replaced and the system fully checked and retested before a replacement unit is installed.



Over voltage on DC bus

The value of the DC Bus Voltage can be displayed in parameter 0107 A historical log is stored at 256ms intervals prior to a trip in parameter 0191 This fault is generally caused by excessive regenerative energy being transferred from the load back to the drive. When a high inertia or over hauling type load is connected. If the fault occurs on stopping or during deceleration, increase the deceleration ramp time 2203 or connect a suitable brake resistor to the drive. If operating in Vector Mode, reduce the speed loop gain in parameter 2301



Under voltage on DC bus

This occurs routinely when power is switched off. If it occurs during running, check the incoming supply voltage, and all connections into the drive, fuses, contactors etc.



Heatsink over temperature

The heatsink temperature can be displayed in parameter 0110. A historical log is stored at 30 second intervals prior to a trip in parameter 0193 Check the drive ambient temperature Ensure the drive internal cooling fan is operating Ensure that the required space around the drive as shown in sections 0 on page 17 has been observed, and that the cooling airflow path to and from the drive is not restricted Reduce the effective switching frequency setting in parameter 2606 Reduce the load on the motor / drive



Under temperature

Trip occurs when ambient temperature is less than -10°C. The temperature must be raised over -10°C in order to start the drive.



Factory Default parameters have been loaded

Press STOP key, the drive is now ready to be configured for the required application



External trip

E-trip requested on control input terminals. Some settings of parameter 9902 require a normally closed contactor to provide an external means of tripping the drive in the event that an external device develops a fault. If a motor thermistor is connected check if the motor is too hot.



Communications Fault

Communications lost with PC or remote keypad. Check the cables and connections to external devices

13. Troubleshooting

13.1. Fault messages

Page 62

Fault Code

No.

Description

Corrective Action



Excessive DC Ripple

The DC Bus Ripple Voltage level can be displayed in parameter 0187 A historical log is stored at 20ms intervals prior to a trip in parameter 0194 Check all three supply phases are present and within the 3% supply voltage level imbalance tolerance. Reduce the motor load If the fault persists, contact your local ABB Drives Sales Partner



Input phase loss trip

Drive intended for use with a 3 phase supply, one input phase has been disconnected or lost.



Instantaneous over current on drive output.

Refer to fault 3 above



Faulty thermistor on heatsink.

Refer to your ABB Sales Partner.



Internal memory fault.

Parameters not saved, defaults reloaded. Try again. If problem recurs, refer to your ABB Authorised Distributor.



4-20mA Signal Lost

The reference signal on Analog Input 1 or 2 (Terminals 6 or 10) has dropped below the minimum threshold of 3mA. Check the signal source and wiring to the ACS255 terminals.



Internal memory fault.

Parameters not saved, defaults reloaded. Try again. If problem recurs, refer to your ABB Authorised Distributor.



Motor PTC Over Temperature

The connected motor PTC device has caused the drive to trip



Cooling Fan Fault

Check and if necessary, replace the drive internal cooling fan



Ambient Temperature too High

The measured temperature around the drive is above the operating limit of the drive. Ensure the drive internal cooling fan is operating Ensure that the required space around the drive as shown in section 4.5 and 4.7 has been observed, and that the cooling airflow path to and from the drive is not restricted Increase the cooling airflow to the drive Reduce the effective switching frequency setting in parameter 2606. Reduce the load on the motor / drive



Maximum Torque Limit Exceeded

The output torque limit has exceeded the drive capacity or trip threshold Reduce the motor load, or increase the acceleration time



Drive output fault



Internal STO circuit Error

Refer to your ABB Sales Partner



Autotune Failed

Measured motor stator resistance varies between phases. Ensure the motor is correctly connected and free from faults. Check the windings for correct resistance and balance.



Measured motor stator resistance is too large. Ensure the motor is correctly connected and free from faults. Check that the power rating corresponds to the power rating of the connected drive.



Measured motor inductance is too low. Ensure the motor is correctly connected and free from faults.



Measured motor inductance is too large. Ensure the motor is correctly connected and free from faults. Check that the power rating corresponds to the power rating of the connected drive.



Measured motor parameters are not convergent. Ensure the motor is correctly connected and free from faults. Check that the power rating corresponds to the power rating of the connected drive.



Output (Motor) Phase Loss

One of the motor output phases is not connected to the drive.



Modbus comms fault

A valid Modbus telegram has not been received within the watchdog time limit set in parameter 3018. Check the network master / PLC is still operating Check the connection cables Increase the value of parameter 3019 to a suitable level



CAN Open comms trip

A valid CAN open telegram has not been received within the watchdog time limit set in parameter 3018 Check the network master / PLC is still operating Check the connection cables Increase the value of parameter 3018 to a suitable level



IO card comms trip

Internal communication to the inserted Option Module has been lost. Check the module is correctly inserted