Modbus
Cellular
Gateway
Index
skipping
is
used
to
reserve
slots
for
new
function
insertion,
when
required.
346
Specify
Authorized
Modbus
Masters
on
the
TCP
network
Specify
the
Master(s)
by
their
IP
addresses
to
reach
the
serially
attached
Slave(s).
Trusted
IP
Definition
Window
Item
Value setting
Description
Source
IP
A
Must
fill
setting
Select
Specific
IP
Address
to
only
allow
an
IP
address
of
the
allowed
Master
to
access
the
attached
Slave(s).
Select
IP
Range
to
only
allow
a
set
range
of
IP
addresses
of
the
allowed
Master
to
access
the
attached
Slave(s).
Select
IP
Address
‐
based
Group
to
only
allow
pre
‐
defined
group
of
IP
address
of
the
allowed
Master
to
access
the
attached
Slave(s).
Note:
group
must
be
pre
‐
defined
before
this
selection
become
available.
Refer
to
System
>
Grouping
>
Host
grouping.
You
may
also
access
to
create
a
group
by
the
Add
Rule
shortcut
button.
Setting
done
through
the
Add
Rule
button
will
also
appear
in
the
Host
grouping
setting
screen.
Then
check
Enable
box
to
enable
this
rule.
Save
N/A
Click
the
Save
button
to
save
the
settings.
Legacy
Modbus
Slave
‐
Device
Mode
(Single
Mode)
This
setting
sets
up
the
AMIT
Gateway
as
a
standalone
Modbus
Slave
Device.
As
a
Modbus
slave
device,
Local
Modbus
Network
Management
System
is
able
to
read
AMIT
gateway
information
and,
hence,
treating
AMIT
gateway
as
a
Slave
device
within
an
existing
SCADA
Network.
To
allow
Modbus
management,
you
will
need
to
assign
one
Modbus
Slave
ID
to
the
AMIT
gateway
and
specify
which
physical
interface,
Ethernet
or
Serial
Port,
of
the
gateway
the
information
will
be
read
from.
The
AMIT
gateway
would
know
from
which
interface
to
listen
to
the
incoming
command
to
respond.
Check
TCP
network
box
for
via
Ethernet
network,
otherwise,
check
Serial
box
for
via
Serial
Port.
Before
you
proceed,
ensure
that
the
Gateway
check
box
along
with
other
enable
boxes
in
the
Gateway
Configuration
screen
are
all
unchecked
as
they
are
features
for
Modbus
‐
attached
Mode.
If
you
are
to
apply
Simultaneous
dual
mode
operation
then
you
will
need
them.
Even
if
they
are
checked
they
will
not
affect
Legacy
Modbus
Slave
‐
Device
Mode
operation
but
will
somehow
confuse
the
Modbus
operator
or
anyone
who
succeed
the
job.
