Siemens SIMATIC IM 151/CPU - Page 144

Instruction List
B-10
ET 200S Interface Module IM 151/CPU
A5E00058783-01
B.5.2 Example of Register-Indirect, Area-Internal Addressing
Example
A I [AR1, P#34.3]
Step 1
Load the contents of AR1 and increment it by the offset 34.3
Address Is In ... Execution Time in s
: :
AR1/AR2 (area-internal) 1.7
: :
Step 2
ANDing of the addressed input (the execution time is in Appendix B.6 and the
following chapters).
Typical Execution Time in s
Direct Addressing Indirect Addressing
0.3
:
1.6+
:
Time for
A I
Total Execution Time
This results in a total execution time of:
Total execution time:
1.7 s
+ 1.6 s
= 3.3 s