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*1 The DNS setting is configured for using the e-mail function. For details, refer to the following.
MELSEC-Q/L Ethernet Interface Module User's Manual (Application)
Item Description Setting range
Timer Setting
TCP ULP Timer Set Time to Live during packet sending in TCP/IP. 2 to 32767
TCP Zero Window Timer
Set the receive buffer value on the recipient. If the receive
buffer on the recipient has no free space (window size = 0),
data sending is waited until the recipient has free receive
buffer space. At this time, the sender sends packets for
checking the sending window to the recipient according to the
TCP zero window timer value to check the receiving status.
2 to 32767
TCP Resend Timer
Set the time to resend ACK if it is not returned when a
connection is opened or data is sent in TCP/IP. This timer is
also used for Time to Live for the ARP function. (ARP is resent
by the time of "TCP resend timer value/2" if no response to an
ARP request is returned.) This timer is also used as the
minimum set time for arrival monitoring time for data link
instructions.
2 to 32767
TCP End Timer
When closing the TCP/IP connection by the own station, set
the monitoring time for waiting for a FIN from the connected
device after the own station sends a FIN and an ACK is
returned from the connected device. If a FIN is not received
from the connected device within the time specified by the
TCP end timer value, a RST is sent to the connected device
and the connection is forcibly closed.
2 to 32767
IP Assembly Timer
The communication data may be divided at the IP level before
being sent due to the buffer limitation of the sending station or
the receiving station. Set the waiting time for the divided data
in such a case.
1 to 32766
Response Monitoring Timer
Set the following waiting time.
• Time for waiting a response after a command is sent
• For receiving divided messages, time until the last message
is received after the first message is received
2 to 32767
Dest. Confirmation Start Interval
Set the time until starting the alive check after
communications with the connected device of the connection
that has been opened where the alive check target exists is
lost.
1 to 32767
Dest. Confirmation Interval
For the connection that is opened where the alive check target
exists, set the interval to perform the alive check again when a
response from the connected device as the alive check target
is not received.
1 to 32767
Dest. Confirmation Resend
For the connection that has been opened where the alive
check target exists, set the number of times that the alive
check is performed again when a response from the
connected device as the alive check target is not received.
1 to 32767
DNS
Setting
*1
Input Format Select an input format. DEC/HEX
IP Address of DNS Server1
Set the IP address of each DNS server.
IP Address of DNS Server2
IP Address of DNS Server3
IP Address of DNS Server4
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