CJ1W-EIP21 Omron, CJ1W-EIP21 Datasheet - Page 407
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CJ1W-EIP21
Manufacturer Part Number
CJ1W-EIP21
Description
Ethernet I/P Module
Manufacturer
Omron
Datasheet
1.CJ1W-EIP21.pdf
(469 pages)
Specifications of CJ1W-EIP21
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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The TCP socket status can be confirmed using the socket status data returned for the FINS command
SOCKET STATUS READ (27 64).
CLOSED
LISTEN
SYN SENT
SYN RECEIVED
ESTABLISHED
CLOSE WAIT
FIN WAIT 1
CLOSING
LAST ACK
FIN WAIT 2
TIME WAIT
Status
SYN
RECEIVED
FIN WAIT-2
FIN
WAIT-1
rcv ACK of FIN
snd FIN
CLOSE
snd ACK
Connection closed.
Waiting for connection.
SYN sent in active status.
SYN received and sent.
Already established.
FIN received and waiting for completion.
Completed and FIN sent.
Completed and exchanged FIN. Awaiting ACK.
FIN sent and completed. Awaiting ACK.
Completed and ACK received. Awaiting FIN.
After closing, pauses twice the maximum segment life (2MSL).
rcv FIN
TCP Status Transitions
Passive OPEN
rcv ACK of SYN
rcv SYN
snd SYN, ACK
snd FIN
CLOSE
rcv ACK of FIN
rcv FIN
snd ACK
Appendix C
Meaning
ESTABLISHED
TIME WAIT
CLOSED
LISTEN
CLOSING
rcv SYN
snd ACK
rcv SYN, ACK
CLOSE
snd ACK
rcv FIN
snd SYN
snd ACK
SEND
Timeout=2MSL
CLOSE
rcv ACK of FIN
ACTIVE OPEN
snd SYN
CLOSED
WAIT
LAST-ACK
CLOSE
snd FIN
SYN
SENT
CLOSED
379
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