Rockwell Automation 1770-KF2 Data Highway or Highway Plus Interface Module User Manual - Manual (Page 193)

Error Reporting
Chapter 7
7Ć38
1770ĆKF2 and 1785ĆKA PCL Link Error Counters
For the KF2, the block of counters in this section are followed by a block
of modem (asynchronous link) counters. They are exactly the same as
those in “1771-KE/KF, 1770-KF2 (Data Highway Mode) Error Counters,”
although in this case, they are numbered starting at 35 rather than at 21.
PCL Diagnostic Counters
Byte No.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23, 24
25, 26
27, 28
29, 30
31, 32
33, 34
35
36
Received ACK with bad CRC.
Timeout expired with no ACK received.
Transmit retries exhausted.
NAK/illegal protocol operation received.
NAK/bad LSAP received.
NAK/no memory received.
Received ACK/NAK too short.
Received ACK/NAK too long.
Something other than an ACK/NAK received.
Duplicate tokens found.*
Duplicate nodes found.*
Token pass timeout.
Token pass retries exhausted.
Claim token sequence entered.
Token claimed.
Bad CRC in received frame.
NAK/illegal protocol operation sent.
NAK/bad LSAP sent.
NAK/no memory sent.
Received frame too small.
Received frame too long.
Received a retransmission of a frame.
Received frame aborted (line noise).
Message successfully sent (low byte first).
Message successfully received (low byte first).
Command successfully sent (low byte first).
Reply successfully received (low byte first).
Command successfully received (low byte first).
Reply successfully sent (low byte first).
Reply could not be sent.
Number of active nodes.
*Does not apply for 1770ĆKF2.