18
Basic Requirements
Throughout this course we will be using the S7-200 PLC for
specific examples of PLC concepts. The S7-200 PLC is used
for this purpose because of its ease of use and wide-spread
application.
The items shown in the following illustration are needed to
create or change an S7-200 PLC program. The program is
created using STEP 7-Micro/WIN programming software,
which runs on a Windows-based personal computer (Win2000,
Windows XP, and higher operating system).
A special cable is needed when a personal computer is used as
a programming device. Two versions of this cable are available.
One version, called an
RS-232/PPI Multi-Master Cable,
connects a personal computer’s RS-232 interface to the PLC’s
RS-485 connector. The other version, called a
USB/PPI Multi-
Master Cable, connects a personal computer’s USB interface
to the PLC’s RS-485 connector.
SF/DIAG
Software
STEP 7 - Micro/WIN
Programming Device
Programming Device Cable
S7-200 PLC
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