Commissioning
54/90
Note:
If the STA1 LED flashes 1x in red (=FIFO overflow), the
(1)
"Buffer
overflow"
entry is made in Wireshark. I. e., a buffer overflow has
occurred and frames have been discarded.
Possible causes of Ethernet frame losses and workaround
If the maximum transfer rate on the Ethernet is greater than the write rate
on the USB memory device, Ethernet frame losses may occur. This applies
in particular to systems that operate with very high loads during data
transmission on the bus.
Ø
Capture only on one TAP to reduce the data load. It is not possible to
write all data to the USB memory device.
Ø
Please note that in the "Autonomous Mode" if the network is loaded with
very high network loads greater than 25% (bidirectional or 50%
unidirectional), not all frame data can be captured when capturing on
one TAP. These details refer to permanent average loads. Short load
peaks can also be higher.
Ø
In "Snapshot mode" the use of hardware filters can help to reduce the
amount of data if necessary. In "Snapshot mode" the performance
depends on the number of configured variables and the complexity of
the trigger condition, since the processing of the frames in the trigger
and during the decoding of the variables requires computation time.
Ø
Switch to interactive operating mode with PC, to record higher data
rates.
Note:
If necessary, use an external USB hard disk, since you can achieve
higher writing rates in comparison to an USB stick.
netANALYZER device NANL-B500G-RE | Installation, operation and hardware description
DOC091110UM26EN | Revision 26 | English | 2019-07 | Released | Public
© Hilscher 2007-2019
