9.4.2
Common parameters
Table 12:
Common 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
Use HW
handshaking
(CTS/RTS)
Enables CTS/RTS handshaking if set to “Yes”.
No, Yes
Gateway
mode
Gateway
mode
If set to “Network master to serial slaves”, the slaves are on the
serial side. If set to “Serial master to network slaves”, the slaves
are on the network side. If the slaves are on the network side, the
routes also need to be defined.
Network master
to serial slaves,
Serial master to
network slaves
Protocols
Serial protocol
Defines the Modbus protocol that serial devices use in serial
communication. The possible settings are Modbus RTU protocol
and Modbus ASCII protocol. ModbusRTU is recommended
because it is more efficient.
ModbusRTU,
ModbusASCII
Table continues on next page
1MRS758460 B
Section 9
Modbus application settings
ARG600 Dual SIM Variant
37
User Manual
