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ABB ACS850 User Manual

ABB ACS850
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Control through the embedded fieldbus interface 337
Modbus function codes
Table below shows the Modbus function codes supported by the embedded fieldbus
interface.
Code Function name Description
0x03 Read Holding Registers Reads the contents of a contiguous block of holding
registers in a server device.
0x06 Write Single Register Writes a single holding register in a server device.
0x08 Diagnostics Provides a series of tests for checking the
communication between the master and the slave
devices, or for checking various internal error
conditions within the slave. The following subcodes
are supported:
• 00 Return Query Data:
The data passed in the request data field is to be
returned in the response. The entire response
message should be identical to the request.
• 01 Restart Communications Option:
The serial line port of the slave device must be
initialized and restarted, and all of its communication
event counters cleared. If the port is in the Listen Only
mode, no response is returned. If the port is not in the
Listen Only mode, a normal response is returned
before the restart.
• 04 Force Listen Only Mode:
Forces the addressed slave device to the Listen Only
mode. This isolates it from the other devices on the
network, allowing them to continue communicating
without interruption from the addressed remote
device. No response is returned. The only function
that will be processed after this mode is entered is the
Restart Communications Option function (subcode
01).
0x10 Write Multiple Registers Writes the contents of a contiguous block of holding
registers in a server device.
0x17 Read/Write Multiple
Registers
Writes the contents of a contiguous block of holding
registers in a server device, then reads the contents
of a contiguous block of holding registers (same or
different than those written) in a server device.
0x2B/0x0E Encapsulated Interface
Transport / Read Device
Identification
Allows reading of identification and other information
of the server.
Parameter "Read Device ID code" supports one
access type:
01: Request to get the basic device identification.
Returns ABB,ACS850.

Table of Contents

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ABB ACS850 Specifications

General IconGeneral
SafetySTO (Safe Torque Off)
CommunicationCANopen
EnclosureIP21
Output VoltageUp to 1000 V DC
Protection FeaturesOvercurrent, Overvoltage, Undervoltage
Cooling MethodAir or liquid cooling
Input Voltage380 to 690 V AC

Summary

About the manual

Compatibility

Compatibility with ACS850 standard control program version UIFI2200 and later.

Safety instructions

Follow all safety instructions delivered with the drive for installation, commission, or use.

Reader

Assumes knowledge of electrical wiring practices, components, and schematic symbols.

The ACS850 control panel

Features

Alphanumeric control panel with LCD, copy function, context-sensitive help, and real-time clock.

Installation

Covers mechanical and electrical installation procedures for the control panel.

Layout

Describes the physical layout and key functions of the ACS850 control panel.

Status line

Explains the basic status information displayed on the top line of the LCD.

Operating instructions

Guides on basic operation, menu navigation, and task execution using the control panel.

Control locations and operating modes

Local control vs. external control

Explains the two main control locations: external and local, selected via LOC/REM key or PC tool.

Operating modes of the drive

Describes the different control modes: speed control, torque control, and special control modes.

Program features

Drive configuration and programming

Details the two parts of the drive control program: firmware and application programs.

Control interfaces

Covers programmable analog and digital inputs/outputs, and I/O extensions.

Motor control

Discusses constant speeds, critical speeds, and speed controller tuning methods.

Application control

Details application macros and process PID control for advanced functions.

Safety and protections

Covers emergency stop and thermal motor protection features for safe operation.

Diagnostics

Includes signal supervision and maintenance counters for monitoring and service reminders.

Load analyzer

Tools for monitoring peak values and amplitude distribution of signals.

Backup and restore of drive contents

Allows backing up and restoring drive settings and configurations.

Application macros

General

Pre-defined parameter sets used as a basis for drive setup and customization.

Factory macro

Suited for straightforward speed control applications like conveyors and pumps.

Hand/Auto macro

For speed control applications with two external control devices.

PID control macro

Suitable for process control applications like pressure, level, or flow control.

Torque control macro

Used for applications requiring torque control of the motor.

Sequential control macro

For speed control applications with multiple constant speeds and ramps.

Parameters

Terms and abbreviations

Defines common terms and abbreviations used throughout the parameter descriptions.

Parameter listing

Comprehensive list of all drive parameters, their values, descriptions, and units.

Additional parameter data

Terms and abbreviations

Defines technical terms and abbreviations used in the manual.

Fieldbus equivalents

Explains scaling between panel values and integers used in serial communication.

Pointer parameter format in fieldbus communication

Details the format for value and bit pointer parameters transferred via fieldbus.

Fault tracing

Safety

Warning that only qualified electricians should maintain the drive.

How to reset

Instructions on how to reset the drive after a fault or alarm occurs.

Fault history

Stores information on the 16 latest faults, including time stamps.

Alarm messages generated by the drive

Lists alarm codes, causes, and recommended actions for troubleshooting.

Control through the embedded fieldbus interface

System overview

Explains connecting the drive to external control systems via a serial communication link.

Connecting the embedded fieldbus to the drive

Details connecting the fieldbus interface to the JCU control unit terminal XD2D.

Setting up the embedded fieldbus interface

Guides on configuring communication parameters for embedded fieldbus.

Setting the drive control parameters

Details drive control parameter adjustments for fieldbus control.

Basics of the embedded fieldbus interface

Explains cyclic and acyclic data transfer using communication profiles.

Control Word and Status Word

Defines the fieldbus Control Word (CW) and Status Word (SW) for drive control and status.

References

Explains fieldbus references (REF1, REF2) for speed, frequency, torque, or process.

Actual values

Describes fieldbus actual values (ACT1, ACT2) conveying selected drive parameter values.

Data inputs/outputs

Explains how drive parameters are accessed via Modbus registers.

Modbus register addresses for the ABB Drives classic profile

Shows Modbus register addresses for ABB Drives classic profile.

Modbus register addresses for the ABB Drives enhanced profile

Shows Modbus register addresses for ABB Drives enhanced profile.

DCU 16-bit profile

Details control/status words, references, and actual signals for the DCU 16-bit profile.

Modbus register addresses for the DCU 16-bit profile

Lists Modbus register addresses for the DCU 16-bit communication profile.

DCU 32-bit profile

Details control/status words and references for the DCU 32-bit profile.

Modbus register addresses for the DCU 32-bit profile

Lists Modbus register addresses for the DCU 32-bit profile.

Modbus function codes

Explains Modbus function codes supported by the embedded fieldbus interface.

Modbus exception codes

Lists Modbus exception codes for communication errors.

Control through a fieldbus adapter

System overview

Explains connecting the drive to external control systems via a fieldbus adapter module.

Setting up communication through a fieldbus adapter module

Guides on configuring parameters for fieldbus adapter communication.

Setting the drive control parameters

Details drive control parameter adjustments for fieldbus control.

Basics of the fieldbus adapter interface

Explains cyclic and acyclic data transfer using fieldbus adapter.

Control Word and Status Word

Defines FBA Control Word (CW) and Status Word (SW) for drive control.

Actual values

Describes fieldbus actual values (ACT) conveying selected drive parameter values.

FBA communication profile

Describes state machine models for FBA communication profiles.

Drive-to-drive link

General

Describes daisy-chained RS-485 communication with master/follower drives.

Wiring

Refers to the Hardware Manual for drive-to-drive link wiring instructions.

Datasets

Explains DDCS messages and dataset tables for data transfer.

Types of messaging

Covers point-to-point, standard multicast, broadcast, and chained multicast messaging.

Control chain and drive logic diagrams

Speed feedback

Illustrates the process of obtaining and conditioning speed feedback signals.

Speed reference modification and ramping

Shows how speed references are modified, scaled, and ramped.

Speed error handling

Details the logic for managing speed errors, including compensation and limits.

Torque reference modification, operating mode selection

Explains torque reference handling and selection of operating modes.

Process PID control

Illustrates the block diagram and operation of the process PID controller.

Drive logic 1

Presents a state machine diagram for the drive's overall logic.

Drive logic 2 (Fieldbus interface)

Shows logic diagrams for control via fieldbus interface.

Direct torque control

Illustrates the DTC control loop, including flux optimization and torque control.

Further information

Product and service inquiries

Contact local ABB representative for product inquiries, quoting type and serial number.

Product training

Information on ABB product training available on the www.abb.com/drives website.

Providing feedback on ABB Drives manuals

Welcome for comments on manuals via the feedback form on the ABB website.

Document library on the Internet

Access manuals and product documents in PDF format via the www.abb.com/drives website.

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