Mitsubishi Melsec-L Series User Manual page 249

Item
TCP ULP Timer
TCP Zero Window Timer
TCP Resend Timer
TCP End Timer
Timer Setting
IP Assembly Timer
Response Monitoring Timer
Dest. Confirmation Start
Interval
Dest. Confirmation Interval
Dest. Confirmation Resend
Input Format
IP Address of DNS Server1
*1
IP Address of DNS Server2
DNS Setting
IP Address of DNS Server3
IP Address of DNS Server4
*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)
Description
Set Time to Live during packet sending in TCP/IP.
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.
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.
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.
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.
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
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.
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.
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.
Select an input format.
Set the IP address of each DNS server.
APPENDICES
Setting range
2 to 32767
2 to 32767
2 to 32767
2 to 32767
A
1 to 32766
2 to 32767
1 to 32767
1 to 32767
1 to 32767
DEC/HEX
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