Siemens CP 243-2 - Manual (Page 18)

Technical Description and Installation Instructions
1-10
SIMATIC NET CP 243-2 AS-i Master
C79000-G8976-C142/02
1.7 Modes of the CP 243-2
Standard Operation
In this type of operation, the user program accesses the user data of the AS-i
slaves and the diagnostic data of the CP 243-2. Programming is simple and this
type of operation is adequate for the majority of automation tasks.
In standard operation, no commands or special parameters are transferred to the
slaves. This type of operation corresponds to the profile M0 of the AS-i master
specification.
Extended Operation
In extended operation, the user program uses the command interface of the
CP 243-2.
This means that the entire range of functions in the AS-i system is available to the
PLC programmer. In particular, the AS-i master calls (for example to assign
parameters to slaves) are available. This type of operation corresponds to the
profile M1e of the AS-i master specification.