Quickstart Guide
ABB PLC and drives integration using Modbus RTU
Modbus
RTU
‐
39
‐
PLC
and
drives
integration
Set
function
block
inputs
according
to:
EN
=
TRUE
(1)
→
The
block
will
always
be
enabled.
PRIO
=
Left
unconnected.
NVAR
=
Number
of
parameters
to
be
read
(2)
→
2
parameters
will
be
read
in
this
example.
PRM_NUM
=
Start
address
of
parameters
to
be
read
(3)
→
parameters
12.02
and
12.03
will
be
read
in
this
example.
DATA
is
connected
via
an
“ADR”
block
to
a
new
variable
(4).
Press
the
“…”
button
(5)
and
choose
type
“ARRAY”
(6),
set
Start
index
to
1
and
End
index
to
the
number
of
values
to
be
read,
2
in
this
example
(7).
Set
type
to
“INT”
(8)
and
press
“OK”.
DRIVE_DATA
=
The
same
variable
that
is
connected
to
“ACS_COM_MOD_RTU”
→
“DRIVE_DATA”
(9).
