Rockwell Automation 1770, D17706.5.16 Ref Mnl DF1 Protocol Command - Manual (Page 164)

9–26 Diagnostic Counters
Publication 1770Ć6.5.16 - October 1996
Cat. Nos. Link Pages
1785ĆKE DH+ 9-11
1785ĆKA3 DH+ 9-28
1785ĆKA DH 9-26
1785ĆKA DH+ 9-27
1785 KA5
DH+
9 29 1785ĆKA5
DH485
9-29
1785ĆL11B, ĆL20B, ĆL30B, ĆL40B, ĆL60B, ĆL80B processors DH+ 9-30
1785ĆL20E, ĆL40E, ĆL40L, ĆL60L, ĆL80E processors DH+ 9-32
1785ĆKA DH Diagnostic Counters
This counter byte Counts the number of
0 Times received ACKs with a bad CRC.
1 Timeouts expired with no ACK received.
2 Mastership contentions.
3 Errors in received ACK.
4 Sum of bytes 1, 2, and 4.
5 WACKs received; stopped sending for a while.
6 Times the master died (assumed mastership).
7 False polls: no answer to poll of size = 1.
8 ACKs received when not master.
9 Received frames that were too small.
10 Received frames that were with SRC = DST.
11 Unused.
12 Received frames containing a bad CRC.
13 Received frames that were too long.
14 Times there was no buffer for the received message, WACK sent.
15 Frame reĆtransmissions received.
16 Received frames aborted (line noise).
17, 18 Messages successfully sent (low byte first).
19, 20 Messages successfully received (low byte first).
21, 22 Commands successfully sent (low byte first).
23, 24 Replies successfully received (low byte first).
25, 26 Commands successfully received (low byte first).
27, 28 Replies successfully sent (low byte first).
29 Replies that could not be sent.
1785 Cat. Nos.