![Modbus IOG700AM-0xCR1 User Manual Download Page 341](http://html1.mh-extra.com/html/modbus/iog700am-0xcr1/iog700am-0xcr1_user-manual_1817029341.webp)
Modbus
Cellular
Gateway
Index
skipping
is
used
to
reserve
slots
for
new
function
insertion,
when
required.
341
Go
to
Advanced
Network
>
Communication
Bus
>
Modbus
tab
In
the
following
Mode
of
configurations
are:
Enable
Modbus
‐
attached
Mode
(Master
‐
attached
or
Slave
‐
attached)
Enable
Legacy
Modbus
Slave
‐
Device
Mode
Enable
simultaneous
dual
mode
operation
(enable
two
of
the
modes)
Modbus
‐
attached
Mode
(Single
Mode)
There
are
two
selections
for
the
Modbus
‐
attached
Mode.
Enable
Master
‐
attached
Mode
if
a
Modbus
Master
Device
is
connected
to
the
Serial
Port
of
the
AMIT
gateway.
Or
enable
Slave
‐
attached
if
a
Modbus
Slave
Device
is
connected.
Before
select
Master
or
Slave
attached
mode,
enable
Modbus
first
as
follows.
The
functions
enabled
in
the
Gateway
Configuration
screen
would
apply
to
Slave
‐
attached
Mode,
Master
‐
attached
Mode,
and
Legacy
Modbus
Slave
‐
Device
Mode.
Enable
Modbus
Enable
Modbus
Window
Item
Value setting
Description
Gateway
Checked
by
default
Check
the
Enable
box
to
enable
Modbus
gateway
function.
Response
Timeout
1000
in
ms
is
set
by
default
This
sets
the
response
timeout
of
the
slave
after
master
request
sent.
If
the
slave
does
not
response
within
the
specified
time,
data
would
be
discarded.
This
applies
to
the
serially
attached
Master
sent
request
over
to
the
remote
Slave
or
requests
send
from
the
remote
Master
sent
to
the
serially
attached
Slave.
Timeout
Retries
0
is
set
by
default
If
the
slave
does
not
respond
to
the
Master’s
request,
the
gateway
will
resend
the
request
stored
in
the
buffer.
If
Timeout
retries
is
set
to
null
(value
zero),
the
gateway
would
not
buffer
Master
requests.
If
a
value
other
than
zero
is
specified,
the
gateway
would
store
the
Master
request
in
the
buffer
and
retries
to
send
the
request
in
a
number
of
specified
times.
Once
the
retries
are
exhausted,
the
gateway
will
send
a
Modbus
error
message
to
the
Master.
However,
if
the
0Bh
exception
box
is
checked
(see
below),
a
0B
hex
code
based
‐
error
message
will
be
send
instead.
Message
Buffering
1.
Unchecked
by
default
2.
Buffer
up
to
32
Check
the
Enable
box
to
buffer
up
to
32
requests
from
Modbus
Master.
Buffering
Master
requests
can
further
be
configured
to
prioritize
request
queue
to
transmit
to
Slave
based
on
Master’s
IP
address
if
requests
are
coming
from
remote