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RuggedRouter® User Guide
The Turnaround field configures the amount of delay (if any) to insert after the
transmissions of Modbus broadcast messages out the serial port. The Turnaround
must be between 1 and 1000 milliseconds inclusive, of off.
The Retransmits field configures the number of times to retransmit the request to the
RTU before giving up, should the original attempt fail.
The Max Conns field configures the maximum number of incoming connections.
The Local Port field configures an auxiliary TCP port to listen upon. TCP Modbus
always listens on TCP port 502. It may be additionally configured to listen on this
auxiliary port number, accepting calls on both.
DNP Menu
The Address Learning field may be set to 'Disabled' or to an Ethernet interface name.
The Aging Timer sets the length of time which a learned DNP device in the Device
Address Table may go without any DNP communication before it is removed from the
table.
The Max Conns field configures the maximum number of incoming DNP
connections.
The Loc Port field configures the TCP/UDP port number on which DNP protocol
listens. DNP devices normally use port 20000.
The Device Address field configures a DNP device address, whether local or remote.
The address may be that of a DNP device connected to a local serial port or one
available via the serial port of a remote IP host. The address may be in the range 1 to
65520. Note that both local and remote serial ports must be properly configured.
208 RuggedCom
Figure 181: DNP Settings