Siemens SIMATIC NET CP 243-2 Manual page 146

Glossary
AS-i module
For the AS-Interface, a module concept has been defined that allows the block-
like linking of AS-i slaves – sensors and actuators – via AS-i modules.
The following types of module exist:
The active AS-i module with an integrated AS-i chip; using this, up to four con-
ventional sensors and actuators can be connected.
The passive AS-i module; this functions as a distributor and provides a connec-
tion for up to four sensors and actuators with an integrated AS-i chip.
In keeping with the concept of the standard AS-i master and the extended AS-i
master, either AS-i chips with standard functions or with extended functions are
used in the AS-i slaves.
AS-i slave
All the nodes that can be addressed by an AS-i master are known as AS-i
slaves.
AS-i slaves are distinguished by their design (AS-i modules and sensors or
actuators with an integrated AS-i attachment) and their address range (AS-i
standard slaves and AS-i A/B slaves with the extended addressing mode).
AS-i standard slave
An AS-i standard slave always occupies one address on the AS-Interface; with
this address organization, up to 31 AS-i standard slaves can be attached to the
AS-Interface.
Extended AS-i master
An extended AS-i master supports 31 addresses that can be used for standard
AS-i slaves or AS-i slaves with the extended addressing mode. This increases
the number of addressable AS-i slaves to a maximum of 62.
The extended AS-i masters of SIMATIC NET support the integrated transfer of
AS-Interface analog slaves that operate in compliance with Profile 7.3/7.4 of the
AS-Interface Specification.
LAS
List of activated slaves.
LDS
List of detected slaves.
LPS
List of permanent slaves.
Glossary-2
SIMATIC NET CP 243-2 AS-i Master
C79000-G8976-C142/02