Logical Operator (Using Simulink)

Perform the specified logical operation on the input.

Library

Math

Description

The Logical Operator block performs any of these logical operations on its inputs: AND, OR, NAND, NOR, XOR, and NOT. The output depends on the number of inputs, their vector size, and the selected operator. The output is 1 if TRUE and 0 if FALSE. The block icon shows the selected operator.

For two or more inputs, the block performs the operation between all of the inputs. If the inputs are vectors, the operation is performed between corresponding elements of the vectors to produce a vector output.
For a single vector input, the block applies the operation (except the NOT operator) to all elements of that vector. The NOT operator accepts only one input, which can be a scalar or vector. If the input is a vector, the output is a vector of the same size containing the logical complements of the elements of the input vector.

When configured as a multi-input XOR gate, this block performs an addition modulo two operation as mandated by the IEEE standard for logic elements.

Data Type Support

An Logical Operator block accepts signals of type boolean on its input ports, unless boolean compatibility mode is enabled (see "Enabling Strict Boolean Type Checking"), in which case the block also accepts inputs of type double. A nonzero input of type double is treated as TRUE (1), a zero input as FALSE (0). All inputs must be of the same type. The output of the block is of the same type as the input.

Parameters and Dialog Box

Operator

The logical operator to be applied to the block inputs. Valid choices are the operators listed above.

Number of input ports

The number of block inputs. The value must be appropriate for the selected operator.

Characteristics


Direct Feedthrough	Yes
Sample Time	Inherited from driving block
Scalar Expansion	Of inputs
Vectorized	Yes
Zero Crossing	No

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