Introduction to STEP 7
1-3
STEP 7 Getting Started
5E00171228-01
1.2 Combining Hardware and Software
Using the STEP 7 software, you can create your S7 program within a project. The
S7 programmable controller consists of a power supply unit, a CPU, and input and
output modules (I/O modules).
The programmable logic controller (PLC) monitors and controls your machine with
the S7 program. The I/O modules are addressed in the S7 program via the
addresses.
Transferring a program
STEP 7 software
Machine to be
controlled
Input module
CPU
Power supply module
Output module
Programming
device cable
Programming device
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