Technical data

The Master Mode – Commands, Sequence, Programming
4-9
SIMATIC NET AS-Interface – Introduction and Basic Information
C79000-G8976-C089/03
data). If an error is detected during the transmission, the master repeats the
appropriate poll.
– Management phase
During this phase, all existing jobs of the control application are processed
and sent. Possible jobs are, for example, as follows:
Parameter transfer:
Four parameter bits (three parameter bits with AS-i slaves with the extended
addressing mode) are transferred to a slave and are used, for example, for a
threshold value setting.
Changing slave addresses:
This function allows the addresses of AS-i slaves to be changed by the
master if the AS-i slave supports this particular function.
– Inclusion phase
In the inclusion phase, newly added AS-i slaves are included in the list of
detected AS-i slaves and providing the configuration mode is selected they
are also activated (with the exception of slaves with address “0”). If the
master is in the protected mode, only the slaves stored in the expected
configuration of the AS-i master are activated. With this mechanism, slaves
that were temporarily out of service are also included again.