Rockwell-automation 1785-ENET USER MANUAL PLC-5 ETHERNET INTERFACE Manuale Utente Scaricare il pdf (Pagina 34)

1785-6.5.19 November 1998

4-4 Communicating via the Interface Module

Monitoring Ethernet Status Data Monitor the status of communication through the PLC-5 Ethernet

interface module by accessing the Ethernet Channel 3A status screen.

The diagnostic counter data displayed is stored in the diagnostics file

you defined on the Ethernet Channel 3A configuration screen (see

page 3-3).

Be sure you have assigned a diagnostics file before

you try to monitor channel 3A. See page 3-4.

Status field: Bytes: Displays the number of:

Commands sent 0-3 Commands sent by the channel

received 4-7 Commands received by the channel

Replies sent 8-11 Replies sent by the channel

received 12-15 Replies received by the channel

sent with error 16-19 Replies containing errors sent by the channel

received with error 20-23 Replies containing errors received by the channel

timed out 24-27 Replies not received within the specified timeout period

Ethernet in octets 28-31 Octets received on the channel

out octets 32-35 Octets sent on the channel

in packets 36-39 Packets received on the channel, including broadcast packets

out packets 40-43 Packets sent on the channel, including broadcast packets

alignment errors 44-47 Frames received on the channel that are not an integral number of octets

in length

FCS errors 48-51 Frames received on the channel that do not pass the FCS check

carrier sense errors 52-55 Times that the carrier sense condition was lost or never asserted while

trying to transmit a frame

excessive collisions 56-59 Frames for which a transmission fails due to excessive collisions

excessive deferrals 60-63 Frames for which a transmission is deferred for an excessive period of

time

MAC receive errors 64-67 Frames for which reception on an interface fails due to internal MAC

sublayer receive error

MAC transmit errors 68-71 Frames for which reception on an interface fails due to internal MAC

sublayer transmission error

single collisions 72-75 Successfully transmitted frames for which transmission was delayed

because of collision

multiple collisions 76-79 Successfully transmitted frames for which transmission was delayed more

than once because of collision

deferred transmissions 80-83 Frames for which the first transmission attempt is delayed because the

medium is busy

late collisions 84-87 Times that a collision is detected later than 512 bit-times into the

transmission of a packet

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 53 54

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Rockwell-automation 1785-ENET USER MANUAL PLC-5 ETHERNET INTERFACE Manuale Utente Pagina 34