Address Assignment; Addressing - Overview - Siemens SIMATIC S7-1500 System Manual

Configuring
6.1 Configuring the CPU
Reference
Information about the individual settings can be found in the online help and in the manual of
the respective CPU.
6.1.2

Address assignment

6.1.2.1

Addressing - overview

Introduction
In order to address the automation components or I/O modules, unique addresses must be
assigned to them. The various address areas are explained below.
I/O address
I/O addresses (input/output addresses) are required in the user program to read inputs and
set outputs.
STEP 7 automatically assigns input and output addresses when you connect the modules.
Each module uses a continuous area in the input and/or output addresses corresponding to
its volume of input and output data.
Figure 6-5 Example with input / output addresses from STEP 7
The address areas of the modules are assigned by default to the process image partition 0
("Automatic updating"). This process image partition is updated in the main cycle of the CPU.
Device address (e.g., Ethernet address)
Device addresses are addresses of modules with interfaces to a subnet (e.g., IP address or
PROFIBUS address). They are required in order to address the various devices on a subnet,
e.g., in order to download a user program.
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Automation system
System Manual, 12/2014, A5E03461182-AC