Rockwell Automation 1770-KF2 Data Highway or Highway Plus Interface Module User Manual - Manual (Page 184)

Error Reporting
Chapter 7
7Ć29
16. Aborts: Counts the number of aborts received. The HDLC abort
signal is not used on the Data Highway but can be detected by the
SIO in certain circumstances. Some stations whose addresses match
the ringing pattern after a transmitter shutoff can be particularly
susceptible to this error (Stations 36, 76, and 176 for example).
These numbers will depend on highway configurations.
17. Transmitted Messages: A 16-bit counter that records the number of
messages successfully transmitted.
18. Not used.
19. Received Messages: A 16-bit counter that records the number of
messages successfully received.
20. Not used.
MODEM CHANNEL COUNTERS
21. 16-bit count of the number of times the station attempted to send a
message.
22. Not used.
23. 16-bit count of the number of messages that were successfully
transmitted and ACKed.
24. Not used.
25. 16-bit counter of the number of ACKs that were received.
26. Not used.
27. Number of ACKs successfully passed from the receiver’s separator
to the transmitter.
28. Number of NAKs received.
29. Number of NAKs passed from the separator to the transmitter.
30. Number of timeouts waiting for a response.