Siemens SIMATIC S7-300 Getting Started page 53

You have configured the control and downloaded the control program in STEP 7
Lite. Next, you will download the entire STEP 7 Lite project to the CPU 312C and
start a test run. The test run demonstrates the interaction between the wired ter-
minals, the LED displays, and the program, which logically links the inputs and
outputs to one another.
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SIMATIC S7-300 Getting Started for First Time Users
Getting Started, 04/2007, 6ZB5310-0NC02-0BA0