Rockwell Automation 1770-KF3 DH-485 Communication Interface User Manual - Manual (Page 51)

Diagnostic Command Support
Appendix B
BĆ3
Table B.B contains the diagnostic read reply values for the KF3:
Table B.B
Diagnostic Read Reply Values
Byte Description
0 Total DHĆ485 packets received, low byte
1 Total DHĆ485 packets received, high byte
2 Total DHĆ485 packets transmitted, low byte
3 Total DHĆ485 packets transmitted, high byte
4 Number of DHĆ485 retries
5 Number of DHĆ485 packets where the retry limit was exceeded
6 Number of DHĆ485 NAK, No Memory sent
7 Number of DHĆ485 NAK, No Memory received
8 Number of DHĆ485 bad messages received
9 Number of DHĆ485 line errors
10 Total RSĆ232C packets received, low byte
11 Total RSĆ232C packets received, high byte
12 Total RSĆ232C packets transmitted, low byte
13 Total RSĆ232C packets transmitted, high byte
14 Number of RSĆ232C retries
15 Number of RSĆ232C packets where the retry limit was exceeded
16 Number of RSĆ232C NAKs sent
17 Number of RSĆ232C NAKs received
18 Number of RSĆ232C bad messages received
19 Number of RSĆ232C line errors
20Ć51 DHĆ485 Active Node Table*
* The Active Node Table indicates what stations (nodes) are on the
network. The station address is used as an offset into the table. If a
node number is not occupied, the node table will show FF. An active
node shows the number of its successor, i.e., the number of the station to
which it will pass the token. Slave devices do not appear.