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AS-Interface Analyser
The advanced statistics implements at the same time the function of the bus and
the analyser.
• The results of the analysers are transferred 1 time per second to the PC and dis-
played there in this rhythm.
• In a net which runs without repetitions, the number of master calls must be the
same for each standard slave (stop the representation briefly: Button "Hold",
continue with "Go" afterwards).
• If the statistics have been stopped, this is represented by a "Stop" indication in
the window.
• The number of the calls to occupied A- and B-slaves must be half as big as the
number of the calls from the standard slaves.
• If a slave is abruptly removed from the system, the master will try to contact him
exactly sixtimes. If the slave does not respond after the 6th time the master
would remove him from the list of active slaves. The number of calls will rise only
if the slave regains communication with the master.
The advanced statistics displays additionally:
• The voltage at the place of the analyser,
• the cycle time,
• the measured time since the last deleting process,
• and the number of slave telegrams without master calls. These errors are very
rare: They can occur, if the analyser is in a position in the net at which it recog-
nizes slave telegrams but no master telegrams.
• The button "Hold" stops the counts in the display. However, it continues to run
in the background as long as no other operating mode is activated. Pressing the
button ("Go") again updates the display.
5.3.4
Consecutive Errors
The tab "Consecutive Errors" brings with the analysis of the multiple errors a fur-
ther, detailed representation of the error situation. It is differentiated between er-
rors that appear a single time and those for which more master calls are needed
before getting a valid response telegram ("failure class").
If only the narrow white field is indicated for a slave this means that no telegram
repetitions have occurred at run time. Up to 6 following broader fields indicate that
errors arose for the respective slave. This is depicted in such a way that you can
see the number of consecutive repetitions from 1 until 6 (increasing from olive
green until red). The largest consecutive error is represented. If an existing slave
is not represented by a white field, this slave is not in an actual data exchange.
Pointing with the mouse to this error representation you learn additionally how of-
ten that error has occurred (slave 19 in fig. 5). So the analyser makes a new im-
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
If the statistics have been stopped, this is represented by a "Stop"
indication in the window.
s
Printed in Germany
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