AS-i/PROFIBUS Gateway Operating the AS-i/PROFIBUS Gateway
Subject to reasonable modifications due to technical advances Copyright Bihl+Wiedemann, Printed in Germany
Bihl+Wiedemann GmbH · D-68199 Mannheim · Phone +49-621-339960 · Fax +49-621-3392239 · Internet http://www.bihl-wiedemann.de
issue date 7.1.2002
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5 Operating the AS-i/PROFIBUS Gateway
5.1 Peculiarities with Double Masters
In configuration mode all detected AS-i slaves are displayed at first before the
display switches to the other AS-i circuit.
The operation of the push buttons is always related to the currently displayed AS-i
circuit (LED AS-i 1/AS-i 2). After a push button was pressed the display stays with
the respective AS-i circuit until the operation is finished or the operator has not in-
terfered for 10 seconds.
5.2 Master Start-Up
After powering on, all segments of the figure display and all LEDs light up for ap-
proximately one second (self-test). Afterwards, the LEDs display the condition of
their respective flags. The figure display shows the condition of the master:
40 Off-line Phase
The AS-i master initializes - there is no data communication on the AS-i.
In configuration mode or when an AS-i Control program is started auto-
matically the device can leave the off-line phase.
In protected mode, if the PROFIBUS communication is interrupted, the
AS-i master switches to the off-line phase after the watchdog time of the
PROFIBUS has expired unless an AS-i Control program is running and
was started automatically.
41 Detection Phase
Start of the start-up phase, where the system looks for slaves located on
the AS-i. The master remains in the detection phase until it finds at least
one slave.
42
1
Activation Phase
Condition at the end of the start-up operation where the parameters are
transmitted to all connected and recognized slaves. This enables access
to the AS-i slaves’ data connections.
In protected mode the displays of the double Masters are switched
over from AS-i circuit 1 to AS-i circuit 2 in a measure of 2 seconds.
If the AS-i circuit is insufficiently powered (“U AS-i” does not
light up) or there is no communication relationship between the
PROFIBUS master and the AS-i/PROFIBUS gateway, the master
remains in the off-line phase.
1. Activation phase and the start of normal operation maybe so short that the numbers can not be seen in the display.
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