L-IP User Manual
119
LOYTEC
Version 6.1
LOYTEC electronics GmbH
Bandwidth utilization
Shows the current and the maximum value of the bandwidth utilization of the corresponding
channel. The bar shows the current bandwidth utilization.
CRC errors
Shows the current and the maximum percentage as well as the total number of packets with
CRC errors observed on the corresponding channel.
Missed Packets
Shows the current and the maximum percentage as well as the total number of packets,
which could not be processed or received on the corresponding channel.
Packets
Shows the current and the maximum number of packets per second as well as the total
number of packets on the corresponding channel.
Missed Preambles
Shows the current and the maximum number of missed preambles per second as well as the
total number of missed preambles observed on the corresponding channel. A missed
preamble is detected, whenever the link layer receives a preamble, which is shorter than the
defined preamble length. A large number in this counter is usually due to noise on the
channel.
Overload
Signals an overload condition of the channel during the last statistic interval. A channel can
be overloaded due to one of the following conditions:
The bandwidth utilization during the last statistic interval exceeded the limit defined by
the parameter “Bandwidth Utilization Limit” (default 70%) OR
The CRC Error Rate during the last statistic interval exceeded the limit defined by the
parameter “CRC Error Limit” (default 5%) OR
The Missed Packets Rate during the last statistic interval was not zero OR
The Missed Preamble Rate during the last statistic interval exceeded the limit defined
by the parameter “Missed Preamble Limit” (default switched off).
Overload Ratio
Ratio between statistic intervals during which the channel was in overload condition and
intervals during which the channel was not in overload condition.
If the checkbox “automatically refresh data” is checked data in the channel statistics view is
refreshed every 15 seconds. The page can be refreshed manually by pressing the “refresh”
button. Finally all statistic data can be cleared by pressing the “clear statistics” button.
9.5.5 Alarm Log
Whenever an alarm occurs (e.g. “Ring open”) on the L-IP Redundant it is logged in the
internal alarm log. The alarm log can hold up to 256 alarms.