User's Manual

LOGO! functions
4.2 Basic functions list - GF
LOGO!
142 Manual, 04/2011, A5E03556174-01
4.2 Basic functions list - GF
Basic functions represent simple logical elements of Boolean algebra.
You can invert the inputs of individual basic functions, that is, the circuit program inverts a
logical "1" at a relevant input to a logical "0"; if "0" is set at the input, the program sets a
logical "1". See the programming example at
Circuit program input (Page 86).
The GF list contains the basic function blocks you can use for your circuit program. The
following basic functions are available:
View in the circuit diagram View in LOGO! Name of the basic function
6HULHVFLUFXLWPDNHFRQWDFW
4





AND (Page 143)
4
൹




AND with edge evaluation
(Page 144)
3DUDOOHOFLUFXLWZLWKEUHDN
FRQWDFWV
4





NAND (Page 145)
(not AND)
4
ൻ




NAND with edge evaluation
(Page 146)
3DUDOOHOFLUFXLWZLWKPDNH
FRQWDFWV
4
ุ




OR (Page 147)
6HULHVFLUFXLWZLWKEUHDN
FRQWDFWV
4
ุ




NOR (Page 148)
(not OR)