AB Quality Allen-Bradley DH-485 User Manual page 51

Communication interface
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Table B.B contains the diagnostic read reply values for the KF3:
Table B.B
Diagnostic Read Reply Values
Byte
Description
0
Total DH 485 packets received, low byte
1
Total DH 485 packets received, high byte
2
Total DH 485 packets transmitted, low byte
3
Total DH 485 packets transmitted, high byte
4
Number of DH 485 retries
5
Number of DH 485 packets where the retry limit was exceeded
6
Number of DH 485 NAK, No Memory sent
7
Number of DH 485 NAK, No Memory received
8
Number of DH 485 bad messages received
9
Number of DH 485 line errors
10
Total RS 232C packets received, low byte
11
Total RS 232C packets received, high byte
12
Total RS 232C packets transmitted, low byte
13
Total RS 232C packets transmitted, high byte
14
Number of RS 232C retries
15
Number of RS 232C packets where the retry limit was exceeded
16
Number of RS 232C NAKs sent
17
Number of RS 232C NAKs received
18
Number of RS 232C bad messages received
19
Number of RS 232C line errors
20 51
DH 485 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.
Appendix B
Diagnostic Command Support
B 3

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