Rockwell Automation 1734-AENTR EtherNet/IP Network Configuration User Manual - Manual (Page 115)

Rockwell Automation Publication ENET-UM001L-EN-P - March 2014 115
Diagnostic Web Pages Chapter 9
Ethernet Statistics
The Ethernet Statistics diagnostic web page presents a summary of the status of
communication activity on the Ethernet network.
The most commonly monitored fields are circled in the graphic and described in
the table that follows.
Table 28 - Ethernet Statistics Web Page
Field Specifies
Ethernet Link
Speed Whether the Ethernet port is operating at 10 or 100 MBps.
Duplex Whether the Ethernet port is operating at half duplex or full duplex.
Autonegotiate Status Whether the port speed and Duplex mode were determined via autonegotiation or whether they were manually
configured.
Media Counters
Alignment Errors A frame containing bits that do not total an integral multiple of eight.
FCS Errors A frame containing eight bits, at least one of which has been corrupted.
Single Collisions The number of outgoing packets that encountered only one collision during transmission.
Multiple Collisions The number of outgoing packets that encountered 2...15 collisions during transmission.
SQE Test Errors A test to detect the collision-present circuit between a transceiver and a network interface card (NIC).
Important: Because most NICs now have an integrated transceiver, the SQE test is unnecessary. Ignore this media
counter.
Deferred Transmissions The number of outgoing packets whose transmission is deferred because the network is busy when the first attempt is
made to send them.
Media Counters
Late Collisions The number of times two devices transmit data simultaneously.