MB52XX Modbus Gateway
User Manual
Configuration
and
Setup
4.6
Basic Settings
In this section, the term
“
Modbus Gateway device
”
will be used to refer to the
MB52XX series
and the term
“
serial
device
”
to refer to any Modbus device that connect to Modbus Gateway via COM, VCOM, or TCP connections
.
In
any Modbus network, there are two types of Modbus devices
:
Modbus Master and Modbus Slave
.
The Modbus
Master will send a request message to a Modbus Slave
.
Then, the Modbus Slave will respond to the Modbus
Master
’
s request
.
A Modbus device
(
serial device
)
that is connected to the MB52XX series Modbus Gateway device
will either assume a role of Modbus Master or Modbus Slave
.
The basic settings in this section will address how
to configure the role of the serial device in your Modbus Gateway device and its serial communication parameters
.
The term
“
Operation Mode
”
will be used to refer to the combination of role
(
Master or Slave
)
and the message or
data transfer types
(
RTU
/
ASCII
/
TCP
)
of the Modbus protocol used by the serial device
.
4.6.1
COM Settings
This section shows how to set up the physical ports of the Modbus Gateway device
(
COM ports or serial ports that
serial devices are connected to
).
The available number of COM ports may vary according to the chosen Modbus
Gateway model
shows the COM Settings web page in which COM1 port is shown with its
Operation
Mode
under
Modbus Setting
and
Serial Configuration
settings
.
These settings will configure the role of the serial
device through the
Operation Mode
and the serial communication parameters of that serial device through the
Serial Configuration
settings
.
Figure 4.9 COM Settings Web Page
