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Industry Cellular Gateway
Modbus Setting
Go to
Field Communication > Bus & Protocol > Modbus
tab.
The Modbus setting page enables user to configure the gateway to operate as a Modbus gateway, and allow
access among Modbus TCP devices (which are connected to Ethernet network) and Modbus RTU/ASCII devices
(which are connected to the Serial Port of the gateway). Once completed the Modbus settings in this section,
ensure to select Modbus Operation Mode in Port Configuration screen to enable Modbus communication on
the serial port.
Define Modbus Gateway function for each Serial Port
Modbus Gateway 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.
Gateway Mode
Disable
is set by
default
Specify the Modbus gateway mode for the selected serial port.
It can be
Disable
,
Serial as Slave
or
Serial as
Master
.
A serial port can be attached with one Modbus Master, or daisy-chained a group
of Modbus Salve devices.
Disable
: Select this to disable the respective Modbus gateway function for the
selected serial port.
Serial as Slave
: Select this when the attached serial device(s) are all Modbus
Slave devices.
Serial as Master
: Select this when the attached serial device is a Modbus Master
device.
Device Slave Mode
The box is unchecked
by default.
Check the
Enable
box to activate the integrated Modbus Salve function, and
enter the preferred ID for the integrated Modbus slave. So that, it can function
as a Modbus Slave device, and can be accessed with legacy Modbus Function
Code from a SCADA management system.
Supported Modbus commands are listed in the following Table.
Value Range
:
1 ~ 247.
Listen Port
1.
502
is set by default
2. Range 1 to 65535
Specify the Listen Port number if Slave device(s) is attached to the selected serial
port.
It is a don’t care setting if a Master device is attached.
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