Modbus
Cellular
Gateway
Index
skipping
is
used
to
reserve
slots
for
new
function
insertion,
when
required.
336
IoT
Gateway
as
Modbus
Gateway
Scenario
Scenario
Application
Timing
When
the
administrator
of
IoT
Gateway
wants
to
configure
the
gateway
to
be
a
Modbus
gateway
for
receiving
requests
from
remote
Modbus
TCP
Master,
accessing
the
attached
Modbus
devices,
and
making
responses
to
the
master
with
device
accessing
results,
then
the
scenario
is
adequate
for
the
application.
The
Modbus
TCP
Master
requests
the
information
from
or
sending
control
commands
to
various
Modbus
devices
that
attached
to
the
IoT
Gateway,
the
Modbus
gateway.
And
IoT
Gateway
executes
corresponding
processes
and
replies
the
Modbus
TCP
Master
with
the
results.
Scenario
Description
The
IoT
Gateway
serves
as
the
Modbus
gateway
to
communicate
with
the
Modbus
TCP
Master,
the
SCADA
Server,
behind
the
"Remote
Gateway"
for
Modbus
device
accessing.
The
Modbus
TCP
Master
requests
the
IoT
Gateway
for
Modbus
devices'
information
or
asking
some
actions
on
them
via
general
Internet
accessing,
and
the
IoT
Gateway
serves
as
the
gateway
for
data
forwarding.
Parameter
Setup
Example
For
Network
‐
B
at
Branch
Office
Following
tables
list
the
parameter
configuration
as
an
example
for
"Modbus
Gateway"
function,
as
shown
in
above
diagram.
Use
default
value
for
those
parameters
that
are
not
mentioned
in
the
tables.
