Quickstart Guide
ABB PLC and drives integration using Modbus RTU
Modbus
RTU
‐
16
‐
PLC
and
drives
integration
Starting
up
ACS550
with
embedded
Modbus
RTU
Minimum
required
parameter
settings
(based
on
factory
default
settings)
Parameter
Description
Setting
Comment
98.02
COMM
PROT
SEL
EXT
FBA
Activates
fieldbus
communication
53.02
EFB
STATION
ID
[Address]
Modbus
RTU
node
address
of
the
drive
53.03
EFB
BAUD
RATE
19.2
kbit/s
(example)
Transfer
rate
of
the
link.
Same
baud
rate
must
be
defined
in
the
Modbus
RTU
master.
53.04
EFB
PARITY
8
NONE
1
(example)
Parity
and
stop
bits.
Same
parity
and
stop
bits
must
be
defined
in
the
Modbus
RTU
master.
53.05
PROFILE
ABB
DRV
FULL
Communication
profile
“ABB
Drives”
Drive
power
down
and
power
up
for
the
new
fieldbus
settings
to
take
effect!
10.01
EXT
1
COMMANDS
COMM
Fieldbus
interface
as
source
for
start
and
stop
11.02
EXT1/EXT2
SEL
COMM
Fieldbus
interface
as
source
to
switch
to
EXT2
11.03
REF1
SELECT
COMM
Fieldbus
interface
as
source
for
speed
reference
16.04
FAULT
RESET
SEL
COMM
Fieldbus
interface
as
source
for
fault
reset
Optional
parameter
settings
30.18
COMM
FAULT
FUNC
[optional]
How
the
drive
reacts
to
a
fieldbus
communication
break.
30.19
COMM
FAULT
TIME
[optional]
Time
between
communication
break
detection
and
the
selected
action.
(11.05)
REF1
MAX
[Scale
max]
Max
speed/frequency
scaling
value
(used
in
function
block/visualization
input
“SPEED_REF_MAX”).
Must
be
less
or
equal
to
drive
parameter
max
speed/frequency.
