(OLPLQDWLQJ5HGXQGDQW7UDIILF
Industrial Ethernet Wireless LAN RLM Manager, CP 1515 Manager
C79000-G8976-C171-01 129
•5HWU\&RXQW - counts the number of frames that are lost (due to
collisions) during the initial transmission. During normal operation, the
5HWU\&RXQW should be less than 3% of the 7UDQVPLWWHG)UDJPHQW
&RXQW.
•0XOWLSOH5HWU\&RXQW - counts the number of frames that are lost after
the initial transmission. During normal operation, the 0XOWLSOH5HWU\
&RXQW will be less than 3% of the 5HWU\&RXQW.
•)DLOHG&RXQW - counts the number of frames that have reached the
5HWU\/LPLW. Failed frames will no longer attempt to re-trans mit.
If the )DLOHG&RXQW is 1% or more of the 0XOWLSOH5HWU\&RXQW, your
network may be suffering from interference. Use the RLM Manager
Remote Link Test Window (page 103) to look for either suddenly high
noise figures, or low SNR values, to find the cause of the interference.
 5HPRWH6WDWLVWLFV7DOOLHV
Select the 5HPRWH tab in the monitor mode. Select either one of the
interfaces from the pull-down menu to display the statistics for the wireless
network interface(s). Then, use the following to diagnose link quality:
1. Compare the number of ,QHUURUV with the number of %ULGJHLQ
SDFNHWV.
• When the number of “In errors” is 1% or more of the “Bridge in
packets”, this may indicate that the wireless medium is very b usy.
2. To verify this assumption, also compare the number of packets “Out
errors” with the number of “Bridge out packets”.