Momentum Modbus Plus 170 PNT Series Guia do Utilizador Página 160

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Using the Ethernet Port
160
870USE10110 July 2004
Description of Ethernet Network Statistics for Momentum Components
Operational
Statistics
Ethernet
Network
Functioning
Errors
Words Description
Words 4, 5 Receive
Interrupts
Number of frames received by this station. Only broadcast frames
pertinent to this station and individual address match frames are
received and counted.
Words 6, 7 Transmit
Interrupts
Number of frames transmitted from this station. Includes all
transmitted broadcast frames for ARP and BOOTP.
Words Description
Words 8, 9 Not used.
Words 10, 11
Total Collisions
This field contains the total number of transmit collisions.
Words 12, 13
Rx Missed
packet Errors
Receive frame was missed because no buffer space was available to store
the frame. Indicates firmware unable to keep up with link. The only time this
should increment is during the save user logic to flash command, when all
interrupts are disabled for 10 seconds.
Words 14, 15 Not used.
Words 16, 17
High word not used, always 0
Low word: peak collision detector
This field contains the number of consecutive collisions that occurred
before the frame was successfully transmitted out onto the Ethernet.
Most transmitted frames have zero collisions. Some have one collision
on the first transmit attempt and succeed on the second attempt. Some
have more than one collision followed by success. The largest number
of consecutive collisions, since clear statistics command, is stored and
displayed in this field.
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