Configuring The Distributed I/O - Siemens SIMATIC STEP 7 V5.2 Getting Started

11 Configuring the Distributed I/O

11.1 Configuring the Distributed I/O with PROFIBUS DP
Automation systems with conventional configurations have the cable connections
to the sensors and actuators inserted directly into the I/O modules of the central
programmable logic controller. This often means a considerable amount of wiring
is involved.
Using a distributed configuration, you can considerably reduce the amount of
wiring involved by placing the input and output modules close to the sensors and
actuators. You can establish the connection between the programmable logic
controller, the I/O modules, and the field devices using the PROFIBUS DP.
You can find out how to program a conventional configuration in Chapter 6. It
makes no difference whether you create a central configuration or a distributed
configuration. You select the modules to be used from the hardware catalog,
arrange them in the rack, and adapt their properties according to your
requirements.
It would be an advantage when reading this chapter if you have already
familiarized yourself with creating a project and programming a central
configuration (see Section 2.1 and Chapter 6).
Compact slaves:
for example, I/O modules
ET 200B-16DI / 16DO
PROFIBUS-DP network
between master and
slaves
STEP 7 Getting Started
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Modular slaves:
for example, ET 200 M-IM153
Direct connection between
CPU and programming
device / PC via MPI
Master device:
for example, CPU 315-2DP
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