COM
Port
Configuration
The
COM
Port
Configuration
is
used
to
configure
the
parameters
for
the
RS
‐
485
Modbus
communication
connection
between
the
MDC
module
and
the
RTU
slave
devices.
Copyright
©
2014
ICP
DAS
Co.,
Ltd.
All
Rights
Reserved.
∗
E
‐
mail:
‐
18
‐
ComPortNo
BaudRate
DataBit
#
Parity
StopBit
Timeout PollDelay
OperatingMode
*
1
115200
8
0
1
100
20
Master
*
2
115200
8
0
1
100
20
Master
*
3
115200
8
0
1
100
20
Master
*
4
115200
8
0
1
100
20
Master
*
5
115200
8
0
1
100
20
Master
The
connection
configuration
for
a
COM
port
consists
of
8
parameters
defined
as
follows.
ComPortNo
Specifies
the
COM
port
number
in
MDC
module.
The
COM
port
number
can
be
1
or
2
for
MDC
‐
711,
and
can
be
1,
2,
3,
4
or
5
for
MDC
‐
714
and
MDC
‐
741.
BaudRate
Defines
the
transmission
speed
between
the
MDC
module
and
the
RTU
slave
devices.
The
BaudRate
can
be
set
to
1200/
2400/
4800/
9600/
19200/
34800/
57600/
115200
(bps)
depending
on
the
RTU
slave
device
being
used.
DataBit
Defines
the
number
of
data
bits
in
each
character.
It
is
fixed
to
8
and
the
RTU
slave
devices
need
be
set
to
8
‐
bit
data,
too.
Parity
Defines
the
Parity
bit.
The
parity
bit
can
be
set
to
0
(none),
1
(even)
or
2
(odd).
StopBit
Defines
the
Stop
bits.
It
is
fixed
to
1,
one
stop
bit.
Timeout
Defines
the
period
of
time
that
the
MDC
module
will
wait
for
a
response
from
the
RTU
slave
device.
The
available
range
is
from
20
to
6000
(ms).
PollDelay
Defines
the
Poll
Delay
between
each
scan
for
Modbus
RTU
communication.
The
available
range
is
from
5
to
600
(ms).
OperatingMode
Defines
the
operating
mode.
‐
Master:
the
com
port
is
used
to
connect
Modbus
RTU
slave
devices.
The
MDC
‐
700
is
acting
as
a
master
to
send
requests
to
slave
devices.
‐
Slave:
the
com
port
is
used
to
connect
Modbus
RTU
master
devices.
The
master
devices
can
read/write
data
from/to
the
MDC
‐
700.
