Omron CS Series Operation Manual page 221

Command/Response Reference
1,2,3...
1,2,3...
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 trans-
mission 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 immediately
sent with the ACK for other data.
10. The number of times the connection was cut off because no ACK was re-
turned after several resend attempts.
11. The number of times no ACK was returned within the resend timer set
time. (The resend timer sets the maximum time limit between the data be-
ing 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 ad-
vertisement is received within the time limit, the number of segments per-
mitted by the transmission window are sent. If the transmission 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
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.
Section 7-3
195