Omron CS1W-ETN21 - Manual (Page 221)

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Command/Response Reference Section 7-3
TCP Transitions (4 bytes)
The TCP connection status is returned as one of the numbers shown in the
following table. Refer to Appendix C TCP Status Transitions for a diagram of
transitions.
Precautions
All the above values are set to 0 if Ethernet communications functions are
stopped due to improper settings in the system setup.
Response Codes
7-3-28 ADDRESS INFORMATION READ
Reads FINS node addresses and IP addresses
Command Block
Response Block
Parameters
Number of Addresses (Response)
The number of pairs of FINS node addresses and IP addresses being
returned. The Ethernet Unit is always 0001 (1 decimal).
Address Information
Pairs of FINS node addresses and IP addresses. Each pair requires 6 bytes
and has the following configuration.
Number Stage Status
00 00 00 00 CLOSED Closed.
00 00 00 01 LISTEN Waiting for connection.
00 00 00 02 SYN SENT SYN sent in active status.
00 00 00 03 SYN RECEIVED SYN received and sent.
00 00 00 04 ESTABLISHED Already established.
00 00 00 05 CLOSE WAIT Received FIN, waiting to close.
00 00 00 06 FIN WAIT 1 Completed and FIN sent.
00 00 00 07 CLOSING Completed and exchanged FIN. Awaiting ACK.
00 00 00 08 LAST ACK FIN sent and completed. Awaiting ACK.
00 00 00 09 FIN WAIT 2 Close completed and ACK received. Awaiting FIN.
00 00 00 0A TIME WAIT After closing, pauses twice the maximum segment
life (2MSL).
Response code Description
0000 Normal
1001 Command too large
27 65
Command
code
27 65
Number
of addresses
Address
information
Response
code
Command
code
6 bytes