Addressing - Siemens SIMATIC ET 200S Manual

Addressing

Principles of Data Transfer Between the DP Master and the IM 151-7 CPU
This chapter contains information on the addressing of I/O modules and data
transfer between the DP master and the IM 151-7 CPU.
The following alternatives are available for addressing the I/O modules:
S 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.
S User-oriented address allocation:
You can allocate each module any address within the available IM 151-7 CPU
address area.
For information on the addressing of the IM 151-7 CPU on the PROFIBUS-DP, see
Section 4.3.
Chapter Overview
In Section
3.1
3.2
3.3
3.4
ET 200S IM 151-7 CPU Interface Module
A5E00058783-04
Slot-oriented addressing of the I/O Modules
User-oriented addressing of the I/O Modules
Data interchange with the DP Master
Accessing the intermediate memory in the IM 151-7 CPU
Contents
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3-4
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3-1