IP packets are processed according the Routing table. There is also possibility to set a router Default
gateway (apply to both interfaces) in the Routing table.
The COM ports are treated in the standard way as router devices, messages can be delivered to them
as UDP datagrams to selected port numbers. Destination IP address of COM port is either the IP of
ETH or the IP of Radio interfaces. The source IP address of outgoing packets from COM ports is always
the IP of ETH interface.
•
ACK
List box: Off, On.
Default = On
○
On
Each frame transmitted on Radio channel from this RipEX has to be acknowledged by the re-
ceiving RipEX, using the very short service packet (ACK), in order to indicate that it has received
the packet successfully. If ACK is not received, RipEX will retransmit the packet according its
setting of Retries.
Note:
The acknowledgement/retransmission scheme is an embedded part of the Radio protocol
and works independently of any retries at higher protocol levels (e.g. TCP or user application
protocol)
○
Off
There is no requirement to receive ACK from the receiving RipEX. i.e. the packet is transmitted
only once and it is not repeated.
•
Retries [No]
[0-15]
Default = 3
When an acknowledge from the receiving RipEX is not received, the frame is retransmitted. The
number of possible retries is specified.
•
RSS threshold [-dBm]
[50-150]
Default = 120
RSS (Received Signal Strength) limit for access to Radio channel. RipEX does not start transmitting
when a frame is being received and the RSS is better than the set limit or when the destination
MAC address of the frame is its own.
•
Repeat COM Broadcast
List box: On, Off
Default = Off
If On, a broadcast originated on COM port (Protocol/Broadcast = On) in any remote unit and received
by this unit on Radio channel is repeated to Radio channel.
Advanced parameters
•
Retransmission settings
An advanced user can modify the frame retransmission protocol parameters in this menu in order
to optimize the network throughput under specific load. This menu is accessible only when parameter
„ACK“ is „On“ and and „Retries [No]“ is greater than zero.
The retransmission timeout is calculated as follows:
Rt = Ft + [0..Mv] * Vt + Prog
Where:
Rt – Retransmission timeout
Ft - time defined by the "Fix timeout [bytes]"
Vt - time defined by the "Variable timeout [bytes]"
Prog – zero when „Progressivity“ is „Off“
Mv – value "Max Variable [No]"
[0..Mv] represents a random number from sequence '0' to 'Mv' (limiting values included).
91
© RACOM s.r.o. – RipEX Radio modem & Router
Advanced Configuration
Summary of Contents for RipEX 1.12.0
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Page 172: ...RipEX Radio modem Router RACOM s r o 172 Safety environment licensing...
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