Quickstart Guide
ABB PLC and drives integration using Modbus RTU
Modbus
RTU
‐
4
‐
PLC
and
drives
integration
Introduction
This
guide
will
take
you
through
the
hardware
installation
and
configuration
of
ABB
ACS
Drives
and
PLC
in
order
to
prepare
for
Modbus
RTU
control.
ABB
‐
specific
ready
‐
made
function
blocks
and
visualizations
from
the
PS553
‐
DRIVES
library
will
be
used
for
the
control
of
the
drives.
While
the
guide
is
applicable
to
all
AC500
PLCs
and
all
Modbus
RTU
compatible
ABB
ACS
drives,
the
example
is
built
up
with
an
AC500
‐
eCo
PLC
and
an
ACS355
drive.
Note!
The
material
in
this
application
might
need
to
be
adapted
according
to
actual
equipment
and
function
before
it
is
used.
Testing
of
the
equipment
must
always
be
performed
by
the
responsible
start
‐
up
person
according
to
current
legislation
before
the
equipment
is
placed
in
service.
ABB
does
not
take
any
responsibility
for
possible
damage
caused
by
using
the
material
in
this
application
(shown
examples,
data,
project
tools,
etc.).
Safety
instructions
Follow
all
safety
instructions
delivered
with
the
used
components:
Read
the
complete
safety
instructions
for
the
used
drive
before
you
install,
commission
or
use
the
drive.
The
complete
safety
instructions
are
given
at
the
beginning
of
the
drives
user’s
manual
(e.g.
for
ACS355:
3AUA0000066143
[English]).
Read
all
safety
and
installation
instructions
of
the
used
PLC.
See
the
online
help
in
CoDeSys
(Help
→
Contents
→
Target
System
→
AC500
/
S500
→
Introduction
→
Overview
→
Regulations).
Limitations
The
following
limitations
are
valid
for
this
guide:
General
o
All
instructions
in
this
guide
are
based
on
default
settings
in
PLC
and
drives
o
PS501
Control
Builder
Plus
version
2.2.0
or
later
o
The
drive
must
be
equipped
with
embedded
Modbus
RTU
or
a
Modbus
RTU
adapter
Function
block
and
visualization
library
PS553
‐
DRIVES
compatibility
o
Communication
profile:
ABB
drives
o
Drive
types:
All
Modbus
RTU
compatible
ABB
ACS
drives
o
Application
types:
Speed/Frequency
control
or
Torque
control
