72 Rockwell Automation Publication ENET-UM004B-EN-P - November 2015
Chapter 6 Module Diagnostics
Ring Statistics
The Ring Statistics diagnostic web page shows the status of the Device-level Ring.
Media Counters Port 1 and Port 2
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.
Late Collisions The number of times two devices transmit data simultaneously.
Excessive Collisions The number of frames that experience 16 consecutive collisions.
MAC Transmit Errors Frames for which transmission fails due to an internal MAC sublayer transmit error.
Carrier Sense Errors Times that the carrier sense condition was lost or never asserted when attempting to transmit a frame.
Frame Too Long The number of incoming packets that exceed the maximum Ethernet packet size.
MAC Receive Errors Frames for which reception on the Ethernet interface failed due to an internal MAC sublayer receive error.
Table 11 - Ethernet Statistic Fields
Field Specifies
To Next Page
Loading...
Need help?
General
