PoE
AP
Router
181
requests
to
prioritize
request
queue
to
transmit
to
Slave
based
on
Master’s
IP
address
if
requests
are
coming
from
remote
Master,
or
based
on
remote
Slave
ID
if
requests
are
coming
from
serially
attached
Master,
or
based
on
Function
Code.
Modbus
Priority
N/A
A
Priority
List
for
setting
the
priority
of
specified
Modbus
identity.
Modbus
Priority
1
~
Modbus
Priority
4.
Priority
Base
IP
Address
by
Default
User
can
specify
a
Modbus
identity
with
IP
Address
,
Slave
ID
,
or
Function
Code
.
The
buffered
Modbus
message
that
matched
the
specified
identity
will
be
handled
with
given
priority.
The
Modbus
Master
requests
can
be
buffered
to
a
certain
priority
queue
according
to
the
Master’s
IP
address
if
requests
are
coming
from
remote
Master,
or
the
remote
Slave’s
device
ID
if
requests
are
coming
from
serially
attached
Master,
or
the
specific
Function
Code
that
issued
by
Master.
Enable
Unchecked
by
default
Check
the
Enable
box
to
enable
the
priority
settings.
Save
N/A
Click
the
Save
button
to
save
the
settings.
Specify
the
definition
of
attached
serial
device(s)
Press
Edit
Button
to
select
serial
mode
and
other
configuration
in
the
following
setting.
Modbus
Serial
Definition
Item
Value setting
Description
Serial
Port
N/A
It
displays
the
name
of
the
serial
port
used.
E.g.
SPort
‐
0.
The
number
of
serial
ports
varies
from
the
purchased
model.
Serial
Mode
Slave
is
set
by
default
Specify
the
serial
device
mode
for
the
attached
Modbus
device(s).
It
can
be
Slave
or
Master
.
A
serial
port
can
be
attached
with
one
Modbus
Master,
or
daisy
‐
chained
a
group
of
Modbus
Salve
devices.
Listen
Port
1.
502
is
set
by
default
2.
Range
1
to
65535
Specify
the
Listen
Port
number
if
a
Slave
device
is
attached.
It
is
a
don’t
care
setting
if
a
Master
device
is
attached.
Value
Range
:
1
~
65535.
Serial
Protocol
RTU
is
set
by
default
Select
the
serial
protocol
that
is
adopted
by
the
attached
Modbus
device(s)
It
can
be
RTU
or
ASCII
.
Enable
N/A
It
displays
whether
the
specific
Modbus
Serial
Port
is
enabled
or
disabled.
To
enable
or
disable
Modbus
Serial
Port,
go
to
Field
Communication
>
Bus
&
Protocol
>
Port
Configuration
tab,
and
set
the
operation
mode
as
Modbus
.
