User Manual

Programming LOGO!
3.2 Blocks and block numbers
LOGO!
Manual, 06/2014, A5E33039675
57
3.2
Blocks and block numbers
This chapter shows you how to use LOGO! elements to create complex circuits and how
blocks and I/O are interconnected.
In the topic "From circuit diagram to LOGO! program (Page 59)" you will learn how to
transform a conventional circuit into a LOGO! circuit program.
Blocks
A block in LOGO! represents a function that is used to convert input information into output
information. Previously you had to wire the individual elements in a control cabinet or
terminal box. When you create the circuit program, you interconnect the blocks.
Logic operations
The most elementary blocks are the logic operations:
● AND
● OR
● ...
These special functions offer you significantly greater performance:
● Pulse relay
● Up/down counter
● On-delay
● Softkey
● ....
The chapter entitled "LOGO! functions (Page 115)" gives a full list of the LOGO! functions.