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FINS Commands Addressed to EtherNet/IP Units or Built-in EtherNet/IP Ports Appendix E
1. The number of times active connections were correctly established.
2. The number of times a SYN packet was received while waiting to establish a passive connection.
3. The number of times active or passive connections were correctly established.
4. The number of times an established connection was cut off.
5. The number of times the connection wait status was cut off.
6. The number of times protocol control blocks or other actively allocated structures were released.
7. The number of segments for the round-trip time (time from segment transmission to ACK).
8. The number of times the round-trip time was changed.
9. The number of times a delayed acknowledgement (ACK) was sent. If the order of the received segments is
reversed, ACK is sent with a packet of data separate from ACK (response to input data, etc.) or is immedi-
ately sent with the ACK for other data.
10. The number of times the connection was cut off because no ACK was returned after several resend at-
tempts.
11. The number of times no ACK was returned within the resend timer set time. (The resend timer sets the max-
imum time limit between the data being output and ACK being returned.)
12. The number of times no window advertisement is received within the time set on the duration timer. (The
duration timer sets the maximum time limit for a window advertisement to be received if the transmission
window is smaller than necessary and the resend timer is not set. If no window advertisement is received
within the time limit, the number of segments permitted by the transmission window are sent. If the trans-
mission window is set to 0, a window probe (1 octet of data) is sent before the timer restarts.)
13. The number of times no segment was sent or received within the time set on the hold timer.
14. The number of times the hold packet is resent. (Always 0.)
15. The number of times the hold packet is sent without response before the connection is cut off.
2) Send Information (40 Bytes)
Ten information items are returned in the following sequence:
1. The total number of packets sent.
2. The number of data packets sent.
3. The number of data bytes sent.
4. The number of data packets resent.
5. The number of data bytes resent.
6. The number of ACK packets sent.
7. The number of window probes (1 octet of data) sent.
8. The number of emergency data packets sent. (Always 0.)
9. The number of window advertisement packets sent.
10. The number of control packets (SYN, FIN, RST) sent.
3) Receive Information (84 Bytes)
Twenty-one information items are returned in the following sequence:
1. The total number of packets received.
2. The number of packets received continuously.
3. The number of bytes received continuously.
4. The number of received packets discarded due to an incorrect checksum.
5. The number of packets discarded because the TCP header was smaller than the minimum size for a TCP
header or was larger than the IP packet.
6. The number of packets discarded because the TCP header and IP header could not be stored in the first
short buffer.
7. The number of resent packets received.