Simulink Reference

Detect Rise Nonnegative

Detect a rising edge when a signal's value increases to a nonnegative value, and its previous value was strictly negative

Library

Logic and Bit Operations

Description

The Detect Rise Nonnegative block determines if the input is greater than or equal to zero, and its previous value was less than zero where

• The output is true (not 0), when the input signal is greater than or equal to zero, and its previous value was less than zero.
• The output is false (equal to 0), when the input signal is less than zero, or if nonnegative, its previous value was greater than or equal to zero.

Data Type Support

The Detect Rise Nonnegative block accepts signals of any data type supported by Simulink, including fixed-point data types.

Parameters and Dialog Box

Initial condition

Set the initial condition of the Boolean expression U/z >= 0.

Characteristics

Direct Feedthrough	Yes
Scalar Expansion	Yes

See Also

Detect Change, Detect Decrease, Detect Fall Negative, Detect Fall Nonpositive, Detect Increase, Detect Rise Positive

Detect Increase

Detect Rise Positive

© 1994-2005 The MathWorks, Inc.