CV500ETN01 Omron, CV500ETN01 Datasheet - Page 256

• Manufacturer Part Number: CV500ETN01
• Description: Programmable Logic Controller
• Manufacturer: Omron

Specifications of CV500ETN01

• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

TCP send buffer
TCP receive buffer
UDP send buffer
UDP receive buffer
FINS receive buffer
RAW send buffer
RAW receive buffer
Hold timer
Resend timer
Continue timer
2MSL timer
IP reassemble timer
ARP timer
Window size
(initial value of maxi-
mum window size)
Fragment size
Segment size
TTL (Time to Live)
Parameter
4,096 bytes
4,096 bytes
9,000 bytes
9,016 bytes
16,383 bytes
2,048 bytes
2,048 bytes
75 s (12 min max.)
Initial value:
Maximum value: 64 s
Initial value:
Maximum value: 60 s
60 s
12 s
20 min/3 min
4,096 bytes
1,500 bytes
1,024 bytes
30
Value
Ethernet Network Parameters
1 s
5 s
Appendix A
Maximum capacity of the TCP send buffer
Maximum capacity of the TCP receive buffer
Maximum capacity of the UDP send buffer
Maximum capacity of the UDP receive buffer
Maximum capacity of the FINS receive buffer
Maximum capacity of the RAW send buffer
Maximum capacity of the RAW receive buffer
The hold timer is used for active open processing of TCP sockets.
An ETIMEDOUT error will occur if connection is not completed within
75 s.
The resend timer is used to monitor completion of reception of arrival
confirmations when transferring data via socket services, including FTP
server and mail transfer TCP sockets. If the timer setting is exceeded
before arrival confirmation is received, data is resent. Resends are per-
formed from the first timeout (1 s) through the 12th timeout (64 s).
An ETIMEDOUT error will occur after the 12th timeout.
The continue timer starts if preparations have been completed to send
data but the send window is too small (either 0 or too small) to send the
data and the remote node has not requested that communications be
restarted. Confirmation of the window size is requested from the remote
node when the continue timer times out. The initial value of the timer is
5 s and confirmation processing will continue consecutively with increas-
ingly longer times until the maximum time of 60 s is reached.
The 2MSL timer starts at the TCP socket that first closes the socket and
will run for 60 s in the TIME_WAIT status.
A fragmented IP packet is discarded if it cannot be reassembled within 12
seconds.
If a complete ARP table entry (with an Ethernet address) is not referred
to for 20 minutes, it is removed from the table.
An incomplete ARP table entry (no response yet returned to the ARP
request) is removed from the table after 3 minutes.
The initial value of the maximum capacity used to control the conver-
gence of TCP sockets. Actually, the node negotiates with the remote
node and uses the smaller of the values for the two nodes. The window
size will fluctuate with the available space in the TCP reception buffers of
the remote node when processing communications.
Data packets are fragmented into 1,500-byte IP packets. UDP data is
separated into 1,472-byte fragments before sending.
TCP data is separated into 1,024-byte units, unless the segments are dif-
ferent, in which case it will be separated into 536-byte units.
Decremented each time an IP router is passed.
Description
231