Siemens SIMATIC NET CP 142-2, Manual, Page: 23 / 84

B8976111/02 AS-i Master Module CP 142-2
3-1
3 Standard Operation of the CP 142-2
Standard operation with the CP 142-2 in the ET 200X distributed I/O station is the most common and
simplest application of the CP 142-2. It allows access to the input and output data of the AS-i slaves.
This type of operation corresponds to the M0 profile of the AS-i master specification and is available
immediately after plugging in the module. No extra FC is required.
3.1 Addressing the CP 142-2
From the point of view of the user program, how the CP 142-2 is addressed depends mainly on the
basic module you are using.
3.1.1 Addressing using the BM141/BM142
From the point of view of the PROFIBUS DP master, the CP 142-2 occupies 16 input bytes and 16
output bytes. How these bytes are addressed depends on the PROFIBUS-DP master you are using
and the configuration tool.
For more detailed information, refer to /4/ and the manuals for your PROFIBUS-DP master.
3.1.2 Addressing when using the BM147
The CP 142-2 occupies 16 input bytes and 16 output bytes in the area of the analog I/Os of the
BM147.
The start address of this address area is decided by the slot of the CP 142-2.
Module Basic module CP CP CP CP CP CP CP
Slot number 1 2 3 4 5 6 7 8 9 10
Start addresses - 256 272 288 304 320 336 352