User Manual
Programming LOGO!   
3.7 Writing and starting the circuit program 
  LOGO! 
98  Manual, 04/2011, A5E03556174-01 
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What is meant by: "LOGO! is in RUN"? 
In RUN mode, LOGO! executes the circuit program. To do so, LOGO! first reads the status 
at the inputs, determines the status of the outputs by means of the circuit program, and 
switches these on or off according to your settings. 
This is how LOGO! indicates the I/O status: 
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