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Logic Function Blocks Section 3-3
3-3-4 NAND
Basic Function A logical NAND of the input signals is output.
Diagram
General Description A logical NAND of the input signals is output.
Up to eight input signals can be evaluated.
Optional Input Setting The number of inputs can be increased on In/Out Setting Tab Page in the
function block property dialog box.
Truth Table
Truth Table for One-input
NAND Evaluation
0: OFF, 1: ON
Truth Table for Two-input
NAND Evaluation
0: OFF, 1: ON, x: Either ON or OFF
Truth Table for Three-input
NAND Evaluation
0: OFF, 1: ON, x: Either ON or OFF
Truth Table for Four-input
NAND Evaluation
0: OFF, 1: ON, x: Either ON or OFF
Default Maximum Number of Inputs
Parameter Setting range Default setting
Number of inputs 1 to 8 2
Input 1 Output 1
0 1
1 0
Input 1 Input 2 Output 1
0x 1
x0 1
11 0
Input 1 Input 2 Input 3 Output 1
0xx 1
x0x
1
xx0 1
111 0
Input 1 Input 2 Input 3 Input 4 Output 1
0xxx
1
x0xx 1
xx0x 1
xxx0
1
1111 0