Rockwell Automation 9220-WINTA ControlNet Traffic Analyzer Reference Manual - Manual (Page 78)

Publication 9220-052C-EN-P - August 2002
8-2 Troubleshooting
An overflow/underflow FIFO error in the ControlNet ASIC may occur
when there is heavy network traffic. You can prevent this error from
occurring by disable the Time Stamp in pre-filter view. See “Pre-Filter
View,” page 4-9. Disabling the Time Stamp will reduce the amount of
work the ControlNet ASIC must perform.
After you click on Continue in the warning box, the error message
displays in the last frame of MAC Frame Data view.
The PC Is Not Able to
Unload All the Received
Data You see the following warning when this condition occurs:
This error occurs when your personal computer cannot keep up with
the ControlNet ASIC traffic. You can use several methods to solve this
error condition:
•
dedicate your computer to the ControlNet Traffic Analyzer tool
(no background tasks running)
•
remove the Power Management
•
use a faster computer
•
reduce the amount of traffic seen by your computer through
defined trigger and pre-filter conditions. Reduce the amount of
traffic by disabling the following MAC frame status or types:
•
Null
•
Scheduled
•
Unscheduled
•
Moderator
The hardware passes through all traffic as enabled by the start,
stop, and pre-filter conditions in the Traffic Analyzer Control
Panel settings.
When the start trigger is defined as “Start Always” and the stop
trigger is defined as “No Stop Condition,” then the traffic seen by
the software is only defined by the pre-filter.