Name
Description
Value range
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
9.4.3
Route parameters
Table 13:
Route parameters
Name
Description
Value range
Route
information
Route in use?
Each IP address and TCP/UDP port of slaves needs to be defined
on separate route entries.
No, Yes
Host (name or
IP-address)
The IP address or host name of a device where packets are routed
by that entry. If host names are used, the DNS server IP address
is required to be defined in the network settings. The Network
Protocol setting on “Common parameters” defines the network
and Modbus protocol used on network communication.
IP address or
host name
TCP or UDP
destination
port
Defines the UDP or TCP destination port where this route entry
sends Modbus requests. The port must be same as used on the
network slave device or gateway behind network. The default
Modbus port is 502.
0...32500
Filter slave
addresses?
Defines if the routing based on Modbus addresses is used for that
entry. If set to “No”, every Modbus request is routed to this entry. If
set to “Yes”, only Modbus requests that have destination
addresses matching the address list of entry are routed. It’s
recommended to use routing based on Modbus address filtering in
order to avoid unnecessary network traffic.
No, Yes
Table continues on next page
1MRS758460 B
Section 9
Modbus application settings
ARG600 Dual SIM Variant
39
User Manual
