Rockwell Automation 1756-RIO ControlLogix Remote I/O Communication Interface Module User Manual - Manual (Page 119)

Publication 1756-UM534B-EN-P - November 2010 119
Monitor Remote I/O Chapter 5
Global Diagnostic Counters
The global diagnostic counters provide information about the operation of the
entire Remote I/O network.
The following table lists the global diagnostic counters’ descriptions.
Scanner Mode Global Diagnostic Counters
Counter Description
Tx This counter increments each time the 1756-RIO module transmits a packet.
RxGood This counter increments when the 1756-RIO module receives a good packet.
RxTout This counter increments when the 1756-RIO module sends a packet but does not receive a reply.
RxBadCRC This counter increments when the 1756-RIO module receives a packet with a bad Cyclic Redundancy Check (CRC). Check
cabling and termination on the Remote I/O network.
RxNoise This counter increments when the 1756-RIO module hears a carrier without receiving a packet. Check cabling and
termination on the Remote I/O network.
RxAbort This counter increments when the 1756-RIO module receives an opening flag, then the packet ends without a closing
flag.
PrtclErr This counter increments when the 1756-RIO module receives a packet that makes no sense in terms of the protocol.
UpdAvg Average update time for all configured racks. This is the average of the previous 64 updates.
UpdMin Minimum update time for all configured racks.
UpdMax Maximum update time for all configured racks.