Quickstart Guide
ABB PLC and drives integration using Modbus RTU
Modbus
RTU
‐
19
‐
PLC
and
drives
integration
Starting
up
ACS880
drives
with
FSCA
01
Modbus
RTU
adapter
Minimum
required
parameter
settings
(based
on
factory
default
settings)
Parameter
Description
Setting
Comment
50.01
FBA
A
enable
Enable
Activates
fieldbus
module
51.02
PROTOCOL/PROFIL
E
ABB
Drives
Classic
or
Enhanced
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.
52.02
FBA
data
in2
Act1
16bit
(5)
Actual
speed
as
Data
Word
2
from
the
drive
53.02
FBA
data
out2
Ref1
16bit
(2)
Speed
reference
as
Data
Word
2
to
the
drive
51.27
FBA
par
refresh
Configure
Updates
fieldbus
settings
(groups
50
to
57)
19.11
Ext1/Ext2
selection
Mcw
Bit11
(06.01)
Fieldbus
interface
as
source
to
switch
to
EXT2
control
location
20.01
Ext
1
commands
Fieldbus
A
Fieldbus
interface
as
source
for
start
and
stop
20.02
Ext1
start
trigger
Level
To
directly
restart
after
Coast
Stop
(Off3)
22.11
Speed
ref1
selection
FB
A
ref1
Fieldbus
interface
as
source
for
speed
reference
31.11
Fault
reset
selection
P.06.01
bit
7
Fieldbus
interface
as
source
for
fault
reset
Optional
parameter
settings
50.02
FBA
A
comm
loss
func
[optional]
Defines
the
drive
operation
after
the
communication
loss
monitoring
awakes.
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.
51.27
FBA
PAR
REFRESH
REFRESH
Updates
fieldbus
settings
(groups
50
to
53)
(46.01)
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.
