Month: November 2025

Introduction

The aim of this application note is to outline how to configure an ACSM1 drive to run with an ABB BSM series AC servo motor.

ACSM1 drives can control induction, synchronous and asynchronous servo and high torque motors with various feedback devices.

The compact hardware, different variants and programming flexibility ensure the optimum system solution.

The innovative memory unit concept enables flexible drive configuration.

The ACSM1 is available in different sizes from 0.75 to 355 kW / (1 to 450 HP) and is designed

for three-phase operation with a 230 to 480 V AC supply.

All units have an IP20 enclosure for cabinet installation (UL open) and are suitable

for single drive and multi-drive (common dc) configurations with integrated Safe Torque-Off (STO) as standard.

The ACSM1 also has different option cards that can be added at the point of order or can be added at a later date,

these include F series fieldbus option modules and FEN series motor feedback modules.

The ABB BSM series of AC servo motors provides a wide range of inertias and torques

and are designed for excellent performance response.

This series has a rugged, durable, industrial design.

Many of the BSM motors are capable of peak torques equal to four times their continuous rating,

which can be used to provide high acceleration torques in applications.

BSM motors are available with a wide variety of feedback devices to suit application needs.

IEC and NEMA configurations are available as well as stainless steel variants.

The ABB ACSM1 AC servo drive can provide basic speed or torque control modes as well as versatile

motion control features.

It also supports a wide variety of servo motors due to the flexible nature of the modular feedback

interface modules.

Introduction

The aim of this application note is to outline how to configure an ACSM1 drive to run with an ABB BSM

series AC servo motor.

ACSM1 drives can control induction, synchronous and asynchronous servo and high torque motors with

various feedback devices.

The compact hardware, different variants and programming flexibility ensure the optimum system

solution.

This series has a rugged, durable, industrial design.

Many of the BSM motors are capable of peak torques equal to four times their continuous rating,

which can be used to provide high acceleration torques in applications.

BSM motors are available with a wide variety of feedback devices to suit application needs.

IEC and NEMA configurations are available as well as stainless steel variants.

How to reset faults

The drive can be used in different configurations so, to answer this question we must first consider which

configuration we are using;

• In Analog Mode the user can set RESETINPUT(0) = [input] or in parameters group: “Error Handling >

Reset Input” to a Digital input.

• In Direct mode if the drive is running a mint program and it goes into an error state, it will automatically try

to call the ONERROR event.

• If configured as a DS402 RTE Slave, the drive is using the DS402 state machine so disabling and re

enabling the drive will reset any active error, though ts best to issue a reset first.

Error categories

Controllers use an error handling system that allocates a unique number for each error. This means that an

error code does not need to be deciphered to determine exactly which individual error has occurred.

Errors are recorded in two ways:

• Error List: This is designed to be manipulated by the Mint program. The controller’s error list can store up to

256 entries on MicroFlex e190 and MotiFlex e180.

• Error Log: This is a historical record of errors and is displayed in Mint WorkBench using the Error Log tool.

On MicroFlex e190 and MotiFlex e180. 5 KB of memory is reserved for the error log, where each error is

dynamically sized. This allows approximately 100 or more errors to be stored.

Entries in the error list can be viewed by type or sequentially, for which there are additional keywords (shown in

brackets in the following lists). Errors are arranged in several categories, with each error having a unique code.

Error categories

Controllers use an error handling system that allocates a unique number for each error. This means that

an error code does not need to be deciphered to determine exactly which individual error has occurred.

Errors are recorded in two ways:

• Error List: This is designed to be manipulated by the Mint program. The controller’s error list can store

up to 256 entries on MicroFlex e190 and MotiFlex e180.

• Error Log: This is a historical record of errors and is displayed in Mint WorkBench using the Error Log

tool.

On MicroFlex e190 and MotiFlex e180. 5 KB of memory is reserved for the error log, where each error is

dynamically sized. This allows approximately 100 or more errors to be stored.

Entries in the error list can be viewed by type or sequentially, for which there are additional keywords

(shown in brackets in the following lists). Errors are arranged in several categories, with each error having

a unique code.

Problem diagnosis

There are 3 ways to get information on the faults that have occurred;

• In Mint WorkBench, connect to the drive and use the Error Log tool to view recent errors, get the

descriptions and then check the help files for more information.

• The drive status display indicates errors and general status information. When an error occurs, the drive

displays a sequence starting with the symbol “E” or “b”, followed by the five-digit error code.

• The drive also has two Network status LEDs that indicate the status of a used RTE master. You can check

the drives hardware manual for more information on how to diagnose the LED status.

What this Document contains

If you have followed all the instructions in this manual in sequence, you should have few problems installing the

ABB Servo Drives. If you do have a problem, this document will help you to navigate then diagnose and resolve

the problem. The following pages contain information on how to understand and resolve issues that can occur.

Before we get to this it’s important to first discuss the fault diagnosis system used in ABB Motion products.

Problem diagnosis

There are 3 ways to get information on the faults that have occurred;

• In Mint WorkBench, connect to the drive and use the Error Log tool to view recent errors, get the descriptions

and then check the help files for more information.

• The drive status display indicates errors and general status information. When an error occurs, the drive

displays a sequence starting with the symbol “E” or “b”, followed by the five-digit error code.

• The drive also has two Network status LEDs that indicate the status of a used RTE master. You can check

the drives hardware manual for more information on how to diagnose the LED status.

In scalar control, some standard features are not available.

IR compensation for a scalar controlled drive IR stands for voltage.

I (current) × R (resistance) = U (voltage).

IR compensation is active only when the motor control mode is scalar.

When IR compensation is activated, the drive gives an extra voltage

boost to the motor at low speeds. IR compensation is useful in applications that

require a high break-away torque. In direct torque control (DTC) mode, IR

compensation is automatic and manual adjustment is not needed.

Sensors like absolute encoders and resolvers indicate the rotor position at all times

after the offset between the zero angle of rotor and that of the sensor has been

established. On the other hand, a standard pulse encoder determines the rotor

position when it rotates but the initial position is not known. However, a pulse

encoder can be used as an absolute encoder if it is equipped with Hall sensors,

albeit with coarse initial position accuracy. The Hall sensors generate so-called

commutation pulses that change their state six times during one revolution, so it is

only known within which 60° sector of a complete revolution the initial position is.

The drive monitors the motor status continuously, also during flux braking.

The other benefits of flux braking are:

• The braking starts immediately after a stop command is given. The function does

not need to wait for the flux reduction before it can start the braking.

• The cooling of the induction motor is efficient. The stator current of the motor

increases during flux braking, not the rotor current. The stator cools much more

efficiently than the rotor.

• Flux braking can be used with induction motors and permanent magnet

synchronous motors.

Two braking power levels are available:

• Moderate braking provides faster deceleration compared to a situation where flux

braking is disabled. The flux level of the motor is limited to prevent excessive

heating of the motor.

• Full braking exploits almost all available current to convert the mechanical braking

energy to motor thermal energy. Braking time is shorter compared to moderate

braking. In cyclic use, motor heating may be significant.