Quickstart Guide
ABB PLC and drives integration using Modbus RTU
Modbus
RTU
‐
20
‐
PLC
and
drives
integration
Starting
up
ACSM1
drives
with
FSCA
01
Modbus
RTU
adapter
Minimum
required
parameter
settings
(based
on
factory
default
settings)
Parameter
Description
Setting
Comment
50.01
FBA
ENABLE
Enable
Activates
fieldbus
module
51.02
PROTOCOL/PROFILE
ABB
Drives
Classic
Communication
profile
“ABB
Drives”
51.03
STATION
ID
[Address]
Modbus
RTU
node
address
of
the
drive
51.04
BAUD
RATE
19.2
kbit/s
(example)
Transfer
rate
of
the
link.
Same
baud
rate
must
be
defined
in
the
Modbus
RTU
master.
51.05
EFB
PARITY
8
NONE
1
(example)
Parity
and
stop
bits.
Same
parity
and
stop
bits
must
be
defined
in
the
Modbus
RTU
master.
52.01
FBA
DATA
IN1
4
Status
word
as
Data
Word
1
from
the
drive
52.02
FBA
DATA
IN2
5
Actual
speed
as
Data
Word
2
from
the
drive
53.01
FBA
DATA
OUT1
1
Control
word
as
Data
Word
1
to
the
drive
53.02
FBA
DATA
OUT2
2
Speed
reference
as
Data
Word
2
to
the
drive
51.27
FBA
PAR
REFRESH
REFRESH
Updates
fieldbus
settings
(groups
50
to
53)
10.01
EXT1
START
FUNC
FBA
Fieldbus
interface
as
source
for
start
and
stop
12.01
EXT1/EXT2
SEL
P.02.12
bit15
Fieldbus
interface
as
source
to
switch
to
EXT2
control
location
24.01
SPEED
REF1
SEL
FBA
REF1
Fieldbus
interface
as
source
for
speed
reference
10.08
FAULT
RESET
SEL
P.02.12
bit
8
Fieldbus
interface
as
source
for
fault
reset
Optional
parameter
settings
51.06
MODBUS
TIMEOUT
[optional]
Time
between
communication
break
detection
and
the
selected
action.
1
=
100
ms.
51.07
TIMEOUT
MODE
CONTROL
WRITE
How
the
drive
reacts
to
a
fieldbus
communication
break.
50.02
COMM
LOSS
FUNC
[optional]
Defines
the
drive
operation
after
the
communication
loss
monitoring
awakes.
51.27
FBA
PAR
REFRESH
REFRESH
Updates
fieldbus
settings
(groups
50
to
53)
(25.02)
SPEED
SCALING
[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.
