ABB RMBA-01 User manual

ABB Drives
Modbus Adapter Module
RMBA-01
User’s Manual
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Modbus Adapter Module
RMBA-01
User’s Manual
3AFE 64498851 REV A EN
EFFECTIVE: 1.3.2002
© 2002 ABB Oy. All Rights Reserved.
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RMBA-01 User’s manual iii
Safety instructions
Overview This chapter states the general safety instructions that
must be followed when installing and operating the
RMBA-01 Modbus Adapter module.
The material in this chapter must be studied before
attempting any work on, or with, the unit.
In addition to the safety instructions given below, read
the complete safety instructions of the specific drive you
are working on.
General safety
instructions WARNING! All electrical installation and maintenance
work on the drive should be carried out by qualified
electricians only.
The drive and adjoining equipment must be properly
earthed.
Do not attempt any work on a powered drive. After
switching off the mains, always allow the intermediate
circuit capacitors 5 minutes to discharge before working
on the frequency converter, the motor or the motor
cable. It is good practice to check (with a voltage
indicating instrument) that the drive is in fact discharged
before beginning work.
The motor cable terminals of the drive are at a
dangerously high voltage when mains power is applied,
regardless of motor operation.
There can be dangerous voltages inside the drive from
external control circuits even when the drive mains
power is shut off. Exercise appropriate care when
working on the unit. Neglecting these instructions can
cause physical injury or death.
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Safety instructions
iv RMBA-01 User’s manual
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RMBA-01 User’s manual v
Table of contents
Safety instructions
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iii
General safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iii
Table of contents
Chapter 1 – Introduction
Intended audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Before you start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
What this manual contains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Terms used in this manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Parameter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Communication module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
RMBA-01 Modbus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Adapter module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Broadcast write. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
4XXXX register area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Chapter 2 – Overview
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Introduction to Modbus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
The RMBA-01 Modbus Adapter module . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Delivery check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Warranty and liability information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Chapter 3 – Installation
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Terminal designations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Bus termination. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
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Table of contents
vi RMBA-01 User’s manual
Chapter 4 – Programming
Configuring the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Modbus connection configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Control locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Chapter 5 – Communication
Register read and write. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Register mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Exception codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Data update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Chapter 6 – Fault tracing
Installation problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Drive setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
PLC programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Diagnostic LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Appendix A – Technical data
RMBA-01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Fieldbus link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-2
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RMBA-01 User’s manual 1-1
Chapter 1 –Introduction
Intended
audience The manual is intended for the people who are
responsible for commissioning and using a RMBA-01
Modbus Adapter module with the ACS 800 drive. The
reader is expected to have a basic knowledge of
electrical fundamentals, electrical wiring practices and
how to operate the drive.
Before you start It is assumed that the drive is installed and ready to
operate before starting the installation of the extension
module.
In addition to conventional installation tools, have the
drive manuals available during the installation as they
contain important information not included in this
manual. The drive manuals are referred to at various
points of this document.
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Chapter 1 –Introduction
1-2 RMBA-01 User’s manual
What this manual
contains This manual contains information on the wiring,
configuration and use of the RMBA-01 module.
Safety instructions are featured in the first few pages
of this manual.
Chapter 2 –Overview contains a short description of
the RMBA-01 Modbus Adapter module, a delivery
checklist and warranty information.
Chapter 3 –Installation contains instructions for
module hardware settings, mounting and cabling.
Chapter 4 –Programming explains how to program
the master station and the drive before the
communication through the adapter module can be
started.
Chapter 5 –Communication contains a description of
how data is transmitted through the RMBA-01 module.
Chapter 6 –Fault tracing explains fault tracing and the
LED indications of the RMBA-01 module.
Appendix A contains technical data.
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Chapter 1 –Introduction
RMBA-01 User’s manual 1-3
Terms used in
this manual
Parameter A parameter is an operating instruction for the drive.
Parameters can be readand programmed withthe drive
control panel, or through the RMBA-01 module.
Communication
module Communication module is a parameter name/ parameter selection name for a device (e.g. a fieldbus
adapter) through which the drive is connected to an
external serial communication network (e.g. a fieldbus).
The communication with the communication module is
activated with a drive parameter.
RMBA-01 Modbus
Adapter module The RMBA-01 Adapter module is one of the optional fieldbus adapter modules available for ACS 800 drives.
The RMBA-01 is a device through which an ACS 800
drive is connected to a Modbus serial communication
bus.
Broadcast write Modbus network allows the Modbus master to perform
a write to every slave station at the same time. This
write is called Broadcast. This service does not give
verification back to the master that the value has been
received by each one of the slaves properly.
4XXXX register area Modicon PLCs have a signed integer data table area,
which is used for analogue output modules and for
storing temporary or set-point values. These registers
are in the address area starting from 40001. The last
register address available on PLCs depends on the
available memory, but is 49999 at most. The drive
simulates this area by providing a read and write
access to its parameters through this register address
area.
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Chapter 1 –Introduction
1-4 RMBA-01 User’s manual
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RMBA-01 User’s manual 2-1
Chapter 2 –Overview
Overview This chapter contains a short description of the Modbus
protocol and the RMBA-01 Modbus Adapter module, a
delivery checklist, and warranty information.
Introduction to
Modbus Modbus is a serial, asynchronous protocol. The
Modbus protocol does not specify the physical
interface. Typical physical interfaces are RS-232 and
RS-485. The RMBA-01 provides a galvanically-isolated
RS-485 interface.
Modbus is designed for integration with Modicon PLCs
or other automation devices, and the services closely
correspond to the PLC architecture. The RMBA-01
supports the RTU protocol only.
The RMBA-01
Modbus Adapter
module
The RMBA-01 Modbus Adapter module is an optional
device for ABB drives which enables the connection of
the drive to a Modbus system. The drive is considered
as a slave on the Modbus network. Through the
RMBA-01 Modbus Adapter module it is possible to:
• Give control commands to the drive
(Start, Stop, Run enable, etc.)
• Feed a motor speed or torque reference to the drive
• Give a process actual value or a process reference to
the PID controller of the drive
• Read status information and actual values from the
drive
• Change drive parameter values
• Reset a drive fault
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Chapter 2 –Overview
2-2 RMBA-01 User’s manual
The Modbus commands and services supported by the
RMBA-01 Modbus Adapter module are discussed in
Chapter 5. Please refer to the user documentation of
the drive as to which commands are supported by the
drive.
Figure 2-1 The construction of the Modbus link and the RMBA-01 Adapter
module layout.
Delivery check The option package for the RMBA-01 Modbus Adapter
module contains:
• RMBA-01 module
• Two screws (M3×8 mm)
• This manual.
4321
CHASSIS
RMBA-01
MODBUS ADAPTER
A- B+ GND SHLD
X1
WD/
INIT
TXD RXD
BUS
S1
TERM.
GND
ABB Drive
ABB Drive
Master
station
Slave
stations Module status LEDs
Fixing screw (GND)
Terminal block for bus
cable connection (X1)
Bus termination switch (S1)Fixing screw
(CHASSIS)
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Chapter 2 –Overview
RMBA-01 User’s manual 2-3
Compatibility The RMBA-01 is compatible with ACS 800 Standard
Application Program version ASXR7000 or later.
Warranty and
liability
information
The warranty for your ABB drive and options covers
manufacturing defects. The manufacturer carries no
responsibility for damage due to transport or unpacking.
In no event and under no circumstances shall the
manufacturer be liable for damages and failures due to
misuse, abuse, improper installation, or abnormal
conditions of temperature, dust, or corrosives, or
failures due to operation above rated capacities. Nor
shall the manufacturer ever be liable for consequential
and incidental damages.
The period of manufacturer's warranty is 12 months,
and not more than 18 months, from the date of delivery.
Extended warranty may be available with certified start-
up. Contact your local distributor for details.
Your local ABB Drives company or distributor may have
a different warranty period, which is specified in their
sales terms, conditions, and warranty terms.
If you have any questions concerning your ABB drive,
contact your local distributor or ABB Drives office.
The technical data and specifications are valid at the
time of printing. ABB reserves the right to subsequent
alterations.
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Chapter 2 –Overview
2-4 RMBA-01 User’s manual
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RMBA-01 User’s manual 3-1
Chapter 3 –Installation
WARNING! Follow the safety instructions given in this
guide and in the ACS 800 Hardware Manual.
Mounting The RMBA-01 is to be inserted into the position marked
SLOT 1 on the drive. The module is held in place with
plastic retaining clips and two screws.The screws also
provide the earthing of the I/O cable shield connected to
the module, and interconnect the GND signals of the
module and the RMIO board.
On installation of the module, the signal and power
connection to the drive is automatically made through a
38-pin connector.
The module can alternatively be mounted on a DIN rail-
mountable AIMA-01 I/O Module Adapter (not available
at the time of publication).
Mounting procedure:
1. Insert the module carefully into SLOT 1 on the
RMIO board until the retaining clips lock the module
into position.
2. Fasten the two screws (included) to the stand-offs.
3. Set the bus termination switch of the module to the
required position.
Note: Correct installation of the screws is essential for
fulfilling the EMC requirements and for proper operation
of the module.
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Chapter 3 –Installation
3-2 RMBA-01 User’s manual
Wiring See the Hardware Manual of the drive for cable routing
information.
Arrange the bus cables as far away from the motor
cables as possible. Avoid parallel runs. Use bushings at
cable entries.
The terminal block (X1) on the RMBA-01 is of the
detachable type for easy connection.
The Modbus cable shield may be directly earthed at
one node only. At other nodes, the cable shield should
be earthed via an RC circuit.
Terminal
designations
Figure 3-1 RMBA-01 terminal designations
X1 Marking Description
1 A Data negative (Conductor 1 in twisted pair).
2 B Data positive (Conductor 2 in twisted pair).
3DG
Data ground (Conductor 3 in a three-wire
system). Used in a three-wire system as a
common reference potential for all devices on
the bus. Three-wire connection is highly
recommended as it improves noise immunity.
See the wiring diagrams below.
4SHLD
Modbus cable shield AC earthing (via an RC
circuit to the frame).
X1
Bus termination switch (S1)
1234
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Chapter 3 –Installation
RMBA-01 User’s manual 3-3
Wiring Diagrams
Figure 3-2 Two-wire connection
Figure 3-3 Three-wire connection (preferred practice)
...
Modbus
Master
Termination: ON
A
1
B
2
DG
3
SHLD
4
X1
RMBA-01
[Station N]
Termination: ON
RMBA-01
[Station 1]
Termination: OFF
A
1
B
2
DG
3
SHLD
4
X1
GND
A B
...
Modbus
Master
Termination: ON
A
1
B
2
DG
3
SHLD
4
X1
RMBA-01
[Station N]
Termination: ON
RMBA-01
[Station 1]
Termination: OFF
A
1
B
2
DG
3
SHLD
4
X1
GND
A B
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Chapter 3 –Installation
3-4 RMBA-01 User’s manual
Bus termination The built-in active bus termination must be switched on
if the RMBA-01 module is installed at the end of the
bus. Otherwise the bus termination must be switched
off. Bus termination prevents signal reflections from the
bus cable ends.
Figure 3-4 Bus termination switch (S1)
Note: The built-in termination circuitry of the RMBA-01
is of the active type, so the module has to be powered
for the termination to work. If the module needs to be
switched off during operation of the network, the bus
can be terminated by connecting a 220 ohm, 1/4 W
resistor between the A and B lines.
ON ON
Bus termination OFF Bus termination ON
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