Rockwell Automation 1756-DHRIO_DHRIOXT ControlLogix Data Highway Plus-Remote I/O Communication Interface Module - Manual (Page 161)

Rockwell Automation Publication 1756-UM514C-EN-P - June 2014 161
PCCC Commands Supported by the Data Highway Plus Module Appendix A
Reset DH+ Diagnostic Counters
After reading your 1756-DHRIO or 1756-DHRIOXT module’s diagnostic
counters, you can reset them back to zero to clear that block of your module’s
internal scratch RAM.
CMD = 06h, FNC = 07
28 Reply successfully received (high byte)
29 Command successfully received (low byte)
30 Command successfully received (high byte)
31 Reply successfully sent (low byte)
32 Reply successfully sent (high byte)
33 Reply could not be sent
34 Duplicate node detected
35 Duplicate token detected
36 Fatal out of memory
37 Underrun
38 - 127 Reserved / Read as 0
128 Number of Active Nodes
129 - 136 Active Node Table
A bit table where the LSB of offset 129 represents node 00 and the MSB of offset 136
represents node 77
If bit = 0, the node is not present
If bit = 1, the node is present
Byte Description