Publication 1756-UM514B-EN-P - February 2003
PCCC Commands Supported by the Data Highway Plus Module B-5
Reset DH+ Diagnostic Counters
After reading your 1756-DHRIO module’s diagnostic counters, you
may want to reset them back to zero to clear that block of your
module’s internal scratch RAM.
CMD = 06h, FNC = 07
23 Message successfully received (low byte)
24 Message successfully received (high byte)
25 Command successfully sent (low byte)
26 Command successfully sent (high byte)
27 Reply successfully received (low byte)
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
Table B.2
DH+ Diagnostic Counters
Byte Description
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