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transmitted during the specified time.
Timeout Between the Acknowledges
Specifies the time after which an acknowledgment (ACK) is to be sent if no data traffic is taking
place. For TCP/IP this value can be 0, which disables the life acks.
Time of the Acknowledge After Received Data
Received data is acknowledged after this time if no data frame has been returned. The shorter the
time, the faster the data traffic, which is only in one direction.
Number of Retries
Specifies the number of retransmissions if no acknowledgment arrives from the receiver (confirming
receipt of the data). When the specified number is reached, the connection is considered broken.
Timeout of an ARP Entry
Specifies how long entries in the ARP cache are valid if they have not been accessed. If an entry in
the ARP cache is not accessed for a certain period of time, it will be removed. This behavior ensures
that changes in the network can be detected and reflected by sending new ARP requests.
Timeout for DNS
Specifies the maximum time for converting a name to an IP address. When the timeout expires, the
DNS request is retransmitted.
Time Between Two Life Data Acks
Time without data communication after which the connection is considered broken. Since TCP/IP as
a WAN protocol normally does not use life data acks, the connection is also broken if no data has
been transmitted during the specified time.
Maximum Frame Length
TPDU = Transport Protocol Data Unit
Specifies the maximum number of bytes that can be transmitted in a frame.
Start Number of the TCP Port Pool
Used for TCP connections in which a port has not been specified. If a port is parameterized as 0, a
port number is generated. The numbers that are used start at the value given here.
Start Number of the UDP Port Pool
Used for UDP connections in which a port has not been specified. If a port is parameterized as 0, a
port number is generated. The numbers that are used start at the value given here.
Factor for Timeout If No Header Is Used
All the timeouts given above are multiplied by this factor if no PLC header has been selected.
Factor for Timeout If RFC1006 Is Used
All the timeouts given above are multiplied by this factor if the RFC 1006 header has been selected.
Allow ICMP Broadcast
By default, echo modules ignore smurph attacks from the Internet (in other words, they do not reply).
If ICMP broadcast frames are to be used in the LAN of a plant, you can select this check box to
cause the echo module to reply.
Default
Resets all the input fields to the defaults.
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