Rockwell Automation 1756-RIO ControlLogix Remote I/O Communication Interface Module User Manual - Manual (Page 120)

120 Publication 1756-UM534B-EN-P - November 2010
Chapter 5 Monitor Remote I/O
Rack Diagnostic Counters
The rack diagnostic counters contain information about the operation of each
partial rack. The rows are racks, from 1…76 octal. There are four groups of
counters per rack, corresponding to the four possible starting I/O groups for
a rack.
The following table lists the rack diagnostic counters’ descriptions.
Monitor Diagnostic Counters in Adapter Mode
Follow this procedure to monitor diagnostic counters in adapter mode.
From the Monitor menu, choose Diagnostic Counters.
The 1756-RIO-ADPT DiagMon window displays. Notice that the Rack Status
Table and the Global Diag Counters are the same in adapter mode as scanner
mode diagnostics. The BT Global Update; however, shows the diagnostics for
the BTRs and BTWs in adapter mode.
Scanner Mode Rack Diagnostic Counters
Counter Description
Rx This counter increments when the 1756-RIO module receives a packet from this rack.
Crc This counter increments when the 1756-RIO module receives a packet with a bad CRC from this rack.
Tout This counter increments when the 1756-RIO module sends a packet to this rack and does not receive a reply within the
time-out period.
Prtcl This counter increments when the 1756-RIO module receives a packet from this rack that does not make sense in terms
of the protocol.