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AS-Interface Analyser
• whether you want to record all or only one part of the telegrams (recording
mask),
• whether you want to see only one part of the registered telegrams on the screen
(view mask).
Trigger, recording, and view mask are nearly identical and have the same struc-
ture, in order to ease the operation training. They are described in detail in the fol-
lowing chapters.
A trace acquires the selected data traffic on the bus, evaluates and logs it. With
this information which goes far beyond the amount of data available from a master
or a control, errors caused by the net or by individual slaves or by the application
can be identified and corrected substantially more easily than with other means.
Weak points can be uncovered preventively.
If the options "Trigger" and "Recording Filter" are used you are able to collect te-
legrams in the analyser eventually over a long time. The PC needs to be attached
for the definition of the trace conditions for the start and for the subsequent eva-
luation only.
Fig 11: Cut-out from a complete trace. The telegrams 4912 to 4935 are shown, here the ex-
piration of 2 error free AS-Interface cycles is recognisable (line 4914 - 4924 and 4925
- 4935). Each AS-Interface call needs 156 µs. In the management phase the slaves
7 and 8 are searched with a read_status command. With slave 7 the search is futile.
It is missing in the existing network.
Subject to reasonable modifications due to technical advances.
SIEMENS AG · Low-Voltage Controls · Phone +49 911 895 59 00 · Fax +49 911 895 59 07 · Internet: http://www.siemens.com/lowvoltage/technical-assistance
Functions of the Analyser
During a trace phase the online statistics is not active. It is continued
after the trace phase and the loading. Telegram errors which have
occurred before the start of a trace remains registered. On the other
hand possible errors during a trace are listed only in the trace but not
in the online statistics.
s
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