10.3
Configuring the network master to serial slaves
mode
1.
In the left pane, under
Serial Port and I/O
, click
Modbus Gateway (RSx)
.
2.
Set
Enable Modbus gateway
to
Yes
.
3.
Set
Gateway mode
to
Network master to serial slaves
.
4.
Set the parameters under
Serial settings
,
Protocols
,
Framing
,
Exceptions
and
Network server settings
as the network and the Modbus master and
slaves require.
5.
Click
Submit
to save the settings.
6.
Restart the device.
10.4
Parameter settings
Table 17:
Parameters
Name
Description
Value range
Basic settings
Enable
Modbus
gateway
If set to “Yes”, the Modbus gateway functionality is enabled for
the serial port. Each serial port of the device has its own Modbus
gateway definitions.
No, Yes
Serial settings
Serial port
Defines the serial port that the device uses for Modbus serial
communication. The possible settings are “RS1”, which selects
serial port 1 (RS-232 console/application port) and “RS2”, which
selects serial port 2 (RS-232/422/485 application port). If a
single serial port or RS-422/485 is required, port 2 is
recommended. If Port 1 is used, the console switch of the device
must be in the Application position. DIP switches below the DB-9
serial connector specify the RS-232/422/485 settings of Port 2.
RS1, RS2
Serial settings
Speed
Defines the serial port speed for Modbus communication in bps.
The optimal speed depends on the connected Modbus
equipment.
300, 1200,
2400, 4800,
9600, 19200,
38400, 57600,
115200
Data bits
Defines the number of data bits used in Modbus serial
communication. The required number depends on how many
data bits the connected Modbus equipment supports. Generally
Modbus RTU communication uses 8 data bits and Modbus
ASCII communication uses 7 data bits.
5, 6, 7, 8, Auto
Parity
Defines the parity method used in Modbus serial
communication. If set to “None”, no parity method is used. If set
to “Even”, an even parity bit is generated and inspected. If set to
“Odd”, odd parity bits are generated and inspected.
None, Even,
Odd
Stop bits
Defines the number of stop bits used in Modbus serial
communication.
1, 2
Table continues on next page
1MRS758456 H
Section 10
Modbus application settings
ARG600 Single SIM Variant
45
User Manual