Accessing Binary Data Of Standard Or A Slaves - Siemens SIMATIC NET CP 343-2 Manual

4 Data Exchange between User Program and AS−i Slaves
4.1.2

Accessing Binary Data of Standard or A Slaves

The bits of the AS-i slaves are accessed using S7 load and transfer commands,
such as:
L PIW X
L PID X
T PQW X
T PQD X
X stands for the byte address on the CP 342-2.
Note
The internal system allows access only to even byte addresses in words or double
words. The byte transfer commands L PIB X and T PQB X are not permitted in
conjunction with the CP 342-2.
Example:
Correct: L PIW 260
Wrong: T PQB 260
Wrong: L PIW 257
42
CP 343−2 / CP 343−2 P AS−Interface Master
Release 08/2008
C79000−G8976−C149−04