Hardware defaults
The memory space and the device series of your LOGO! determines:
How many blocks you can use in the circuit program
Which blocks you have available to create your circuit program
A LOGO! of the latest device generation is selected by default.
After you have created a circuit program, you can call the Tools -> Determine LOGO! menu command or press the function key [F2] to display an Info Window that shows you which LOGO! devices are available for executing your circuit program.
The blocks which are not available for your selected LOGO! are grayed out.
Optimizing the circuit program
Should you determine in the course of creating your circuit program that a LOGO! device is unable to handle your circuit program, you should first fall back on all the functional resources offered to you by the LOGO! device. You could, for instance, replace memory intensive blocks with a structure consisting of several blocks, which altogether require less memory space.
If the various optimization attempts are unsuccessful, then you can use an additional LOGO!, or optimize / simplify the functionality of your application.