Rockwell-automation 1785-ENET PLC-5 Ethernet Interface Module Installa Uživatelský manuál stáhnout pdf (Strana 27)

PLC-5 Ethernet Interface Module 27

Publication 1785-IN019B-EN-P - January 2007

Monitor Ethernet Status Data

Monitor communication status through the module by accessing the Ethernet Channel 3A

status dialog.

Ethernet Status Data

Use the Message Instruction

The message (MSG) instruction transfers up to 1000 elements of data; the size of each

element depends on the data table section that you specify and the type of message command

that you use. One binary element contains one 16-bit word, for example, and one

floating-point element contains two 16-bit words.

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 ... 22 23 24 25 26 27 28 29 30 31 32 ... 47 48

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