Siemens SIMATIC S7-200 Manual - Página 48

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Siemens SIMATIC S7-200 Manual
Appendix
A.2 Address areas of the S7-200
A.2

Address areas of the S7-200

The diagram below shows the memory addresses of the S7-200 PLC where inputs and
outputs are mapped. For example, if a voltage is applied to a physical input, this "1" signal is
mapped at an address in the memory that is assigned to this input. The memory areas which
form the interface with the screw terminals (inputs and outputs) of the PLC are called the
"process image of the inputs" (PII) and the "process image of the outputs" (PIO). These
memory areas contain an image of the signals from your control process.
48
Getting Started - Beginners
Training Documents, 07/2007, A5E01031470B