MF5700
User
Manual
24
|
P a g e
5.6
RS485
Modbus
communication
protocol
The
digital
communication
protocol
is
based
on
standard
Modbus
RTU
Half
‐
plex
mode.
A
master
(PC
or
PLC)
can
communicate
with
multiple
slaves
(the
current
product)
for
data
exchange
and
communication
parameter
configuration.
5.6.1
Hardware
connection
The
hardware
layer
is
TIA/EIA
‐
485
‐
A,
as
illustrated
below.
In
this
configuration,
the
product
(MF5700)
is
a
slave.
5.6.2
Communication
parameters
The
PC
UART
communication
parameters
are
listed
in
the
following
table.
Parameters
Protocol
RTU
Baud
rate
(Bits
per
second)
9600
bps
Start
bits
1
Data
bits
8
Stop
bits
1
Even/Odd
parity
None
Bits
period
104.2
µsec
Bytes
period
1.1458
msec
Maximum
data
length
20
Maximum
nodes
247
