Rockwell Automation 1785-Lxxx Enhanced and Ethernet PLC-5 Programmable Controllers - Manual (Page 193)

Publication 1785-UM012D-EN-P - July 2005
Communicating with Devices on an Ethernet Network 11-19
Details of each counter on the General Ethernet Counters page are described
in the following table.
6. At the bottom of the General Ethernet Counters page, click on
Diagnostic Information
to return to that page.
This Counter Totals
Commands Sent number of PCCC (programmable controller communication commands)
sent by the module
Replies Sent number of PCCC replies sent by the module
Command Received number of PCCC commands received by the module
Replies Received number of PCCC replies received by the module
Replies Sent with Error number of PCCC replies with error status sent by the module
Replies Received with Error number of PCCC replies with error status received by the module
Replies Timed Out
number of PCCC replies that were not received within the time period
specified on the Ethernet Configuration page
In Octets number of octets received by the module
Out Octets number of octets sent by the module
In Packets number of packets received by the module, including broadcast
packets
Out Packets number of packets send by the module, including broadcast packets
Alignment Errors count of frames received that are not an integral number of octets in
length
FCS Errors count of frames that do not pass the FCS check
Carrier Sense Errors number of times that the carrier sense condition was lost or never
asserted when attempting to transmit a frame
Excessive Collisions count of frames when transmission fails caused by excessive
collisions
Excessive Deferrals count of frames when transmission is deferred for an excessive period
of time
MAC Receive Errors count of frames when transmission fails because of an internal MAC
sublayer receive error
MAC Transmit Errors count of frames when transmission fails because of internal MAC
sublayer transmit error
Single Collisions count of successfully transmitted frames when transmission is
inhibited by one collision
Multiple Collisions count of successfully transmitted frames when transmission is
inhibited by more than one collision
Deferred Transmissions count of frames when the first transmission attempt is delayed
because the medium is busy
Late Collisions number of times that a collision is detected later than 512 bit-times
into the transmission of a packet
Packet Storms number of times the SONIC driver has entered storm or throttle back
operation due to excessive traffic