Data Exchange Between the DP Master and AS-i Slave
53
DP/AS-Interface Link 20E
Release 11/2002
C79000-G8976-C138–04
2.3.2 Accessing AS-i Binary Data
The DP Master is the Decisive Factor
The way in which you access binary data of the AS-i slaves depends on the DP
master you are using. Please refer to the relevant user documentation.
A SIMATIC S7 is the DP master
If you have configured the I/O addresses of the DP/AS-i Link 20E in the area of the
process image, you can access the AS-i bit values using single bit commands.
Example (see also Figure 2-2):
A I 1.0 //Attachment 1 on AS–i module 3
= Q 1.3 //Attachment 4 on AS–i module 3
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