Addressing The Cp 343-2 In The S7 Automation System - Siemens SIMATIC NET CP 343-2 Manual

1 Technical Description
1.9

Addressing the CP 343-2 in the S7 Automation System

The CP 343-2 can be addressed by the PLC like an analog module with 16 input
bytes and 16 output bytes. The CP occupies 16 input bytes and 16 output bytes in
the I/O address space of the S7 automation system (analog area on the AS).
Of the 16 bytes I/O address area of the CP 343-2, 31 x 4 bits are used for the
binary data of the AS-i standard slaves or A slaves. The remaining four bits are
reserved for later applications.
The base address n of this address area is fixed as follows by the slot of the
CP 343-2.
Rack 0
Module PS
Slot number 1
Base address 1
Rack 1
Module
Slot number
Base address
Rack 2
Module
Slot number
Base address
Rack 3
Module
Slot number
Base address
Note
In most CPUs (for example, the CPU 315-2DP, 318), the slot-oriented addressing
can be modified with STEP 7 configuration (HW Config).
In particular, with the freely configurable CPUs, it is possible to address the
standard AS-i slaves or the A/B slaves with A addresses from the extended
address area via the process image of the inputs and outputs.
24
CPU IM CP CP
2 3 4 5
2 3 256 272
IM CP CP
3 4 5
384 400
IM CP CP
3 4 5
512 528
IM CP CP
3 4 5
640 656
CP CP CP CP
6 7 8 9
288 304 320 336
CP CP CP CP
6 7 8 9
416 432 448 464
CP CP CP CP
6 7 8 9
544 560 576 592
CP CP CP CP
6 7 8 9
672 688 704 720
CP 343−2 / CP 343−2 P AS−Interface Master
C79000−G8976−C149−04
CP CP
10 11
352 368
CP CP
10 11
480 496
CP CP
10 11
608 624
CP CP
10 11
736 752
Release 08/2008