AS-i/PROFIBUS Gateway
Operating the AS-i/PROFIBUS Gateway
Subject to reasonable modifications due to technical advances.
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6
Operating the AS-i/PROFIBUS Gateway
6.1
Master Start-Up
After powering on, all segments of the figure display and all LEDs light up for approx-
imately one second (self-test). Afterwards, the LEDs display the condition of their re-
spective flags. The LCD displays 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 Profi-
bus has expired unless an AS-i Control program is running and was
started automatically.
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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.
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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.
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1
Start of Normal Operation
In normal operation the AS-i master can exchange data with all active
slaves. It transmits management messages and looks for and activates
newly connected slaves. During normal operation, the system keeps the
maximum cycle time of 5 milliseconds.
6.2
Configuration Mode
The configuration mode serves to configure the AS-i circuit.
If the AS-i circuit is insufficiently powered (“U ASI” 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.
In the configuration mode, all recognized slaves are activated even
when the desired and actual configurations do not match.
