X20 system modules • X20 hub system • X20ET8819
X20 system User's Manual 3.10
1895
Example 2
A system containing multiple X20 I/O systems on the POWERLINK network is experiencing sporadic failures. An I/
O slave suddenly fails for no apparent reason after running properly for a long time. To analyze whether the failure
is network related, the time before the failure must be recorded.
Problems:
The master has no indication as to when and why the problem occurs. That means there is no start condition for the
recording. Someone would have to stay on the analysis PC the whole time to stop recording when the error occurs.
Solution:
Input
Description
ExternActivate
Input permanently wired to 24 VDC = Activates the external trigger function
ExternStart
Input permanently wired to 24 VDC = Ensures that the recording starts immediately when the X20ET8819 is turned on
ExternStop
Connect input to a digital output on the affected I/O slave, which is permanently set to 1 by the program. As soon as the slave
fails the first time and resets the digital outputs, recording is stopped by the negative edge on ExternStop and is not started again.
Table 676: Function of the inputs in Example 2
4.24.2.16 Using trigger outputs
Output
Name
Description
1
FrameError
As soon as a frame error (CRC, Oversize, Preamble, Noise or Alignment) occurs, this output is set for 10 ms.
2 - 12
-
Reserved
Table 677: Using trigger outputs in the event of an error
4.24.2.17 B&R recording software
The recording plug-in (for WildPackets OmniPeek
™
) to decode the capture frames is available for download in
the Download section on the B&R homepage.
B&R provides the following free recording software for the module in the Downloads section of the B&R website:
•
Ethernet Analyzer Plugin for Wildpackets OmniPeek
™
•
B&R Network Analyzer (stand-alone solution)
Summary of Contents for X20 System
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