User Manual

Programming LOGO!
3.7 Writing and starting the circuit program
LOGO!
72 Manual, 06/2014, A5E33039675
Note
You can invert individual inputs of the basic and special functions; that is, if an input carries a
logical "1" signal,
you can cause the circuit program to output a logical "0". You can also
cause LOGO! to invert a logical "0" signal to a logical "1".
To invert an input, move the cursor to the relevant position, for example:
Confirm with
OK
.
Now press
or to invert this input:
Next, press
ESC
.
You can review your first circuit program by pressing or to move the cursor through the
circuit program.
To exit circuit programming mode and return to the programming menu, press
ESC
Note
LOGO! has now saved your circuit program to nonvolatile memory. The circuit p
rogram
remains in the LOGO! memory until you explicitly delete it.
You can save the actual values of special functions in the case of a power outage assuming
that these functions support the "Retentive" parameter and that the necessary program
memory is av
ailable. By default, LOGO! deactivates the "Retentive" parameter when you
insert a function; to use it, you must enable this option.