Siemens SIMATIC S7-300 Getting Started page 34

Getting started for first time users

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3 Installing and

wiring the hardware

Note

To make the example easier

to follow, we will use colored

momentary contact switches.

You can implement the exam-

ple with commercially avail-

able momentary contact

switches of any color.

Testing the connections

Now, test your wiring to verify that it is functioning properly.

For this purpose, take turns pressing the momentary contact switches and

observe the LEDs on the inputs of the CPU. Whenever an input is activated, the

corresponding LEDs always light up.

• Press the green momentary contact switch for "Motor ON". The LED of input

0.0 (terminal 2) will light up.

• Press the red momentary contact switch for "Motor OFF". The LED of input

0.1 (terminal 3) will light up.

• Press the right momentary contact switch for "Clockwise rotation". The LED of

input 0.2 (terminal 4) will light up.

• Press the left momentary contact switch for "Counterclockwise rotation". The

LED of input 0.3 (terminal 5) will light up.

You have installed, wired, and tested all components. Next, you will create the

control structure in STEP 7 Lite and download the configuration to the

CPU 312C.

SIMATIC S7-300 Getting Started for First Time Users

Getting Started, 04/2007, 6ZB5310-0NC02-0BA0

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