2-1
ET 200S Interface Module IM 151/CPU
A5E00058783-01
Addressing
Principle of Data Transfer Between the DP Master and the ET 200S
This chapter contains information on the addressing of I/O modules and data
transfer between the DP master and the IM 151/CPU.
The following alternatives are available for addressing the I/O modules:
Slot-oriented address allocation:
Slot-oriented address allocation is the default form of addressing, in which
STEP 7 allocates a fixed module base address to each slot number.
User-oriented address allocation:
You can allocate each module any address within the available IM 151/CPU
address area.
For information on the addressing of the IM 151/CPU on the PROFIBUS-DP, see
Section 3.2.
In This Chapter
In Section Contents Page
2.1 Slot-Oriented Addressing 2-2
2.2 User-Defined Addressing 2-4
2.3 Data Transfer with the DP Master 2-5
2.4 Accessing the Intermediate Memory in the IM 151/CPU 2-7
2
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