Name
Description
Value range
Server
TCP/UDP -
port
Defines the TCP or UDP port that masters can form connections
to. Default Modbus TCP/IP communication port is 502. If
multiple Modbus gateways are running on same device (for both
serial ports) the TCP/UDP communication ports must not be
same. For example, ports 502 and 504 can be used. The
network and the device's firewalls must enable TCP or UDP
communication for that port.
1...32500
Max. number
of clients
Defines how many network masters can be connected to the
device simultaneously. The recommended value is at least 2
when using TCP communication. Otherwise if the device does
not recognize a partially closed connection, forming new
connections is not accepted by the device the time set in
parameter “Connection idle timeout” is elapsed.
0...20
Connection
idle timeout
If there has not been communication on this route during given
amount of seconds, the device automatically closes the TCP
connection to slave and therefore frees the slave’s
communication resources. This is especially useful when
multiple masters access the same slave. The recommended
setting is about two times the polling interval of the master.
0...32500
Enable
keepalive
Defines if connection testing is performed by sending TCP
keepalive packets at certain intervals. enabled for TCP network
communication. If set to “Yes”, testing the TCP connection with
slave is enabled.
No, Yes
1MRS758456 H
Section 10
Modbus application settings
ARG600 Single SIM Variant
47
User Manual
