Fixed-Point Blockset

Unit Delay With Preview Resettable External RV

Output the signal and the signal delayed by one sample period, with an external RV reset

Library

Delays & Holds

Description

The Unit Delay With Preview Resettable External RV block supports calculations that have feedback and depend on the current input.

The block can reset its state based on an external reset signal R. The block has two output ports. When the external reset R is false, the upper port outputs the signal and the lower port outputs the signal delayed by one sample period.

When the external reset R is true, the upper output signal is forced to equal the external reset signal RV. The lower output signal is not affected until one time step later, at which time it is equal to the external reset signal RV at the previous time step. The block uses the internal Initial condition only when the model starts or when a parent enabled subsystem is used. The internal Initial condition only affects the lower output signal. The first output is only affected through feedback.

The input u and initial condition IC must be the same data type, but can be any data type. The output is the same data type as the inputs u and IC. The reset R can be any data type.

You specify the time between samples with the Sample time parameter. A setting of -1 means the Sample time is inherited.

Parameters and Dialog Box

Initial condition

Initial condition.

Sample time

Sample time.

Characteristics

Input Port u	Any data type supported by the blockset
Input Port R	Any data type supported by the blockset
Input Port RV	Same as the input u
Output Ports	Same as the input u
Direct Feedthrough	Yes, to upper output port No, to lower output port
Scalar Expansion	Yes

See Also

Unit Delay, Unit Delay Enabled, Unit Delay Enabled External IC, Unit Delay Enabled Resettable, Unit Delay Enabled Resettable External IC, Unit Delay External IC, Unit Delay Resettable, Unit Delay Resettable External IC, Unit Delay With Preview Enabled, Unit Delay With Preview Enabled Resettable, Unit Delay With Preview Enabled Resettable External RV, Unit Delay With Preview Resettable

Unit Delay With Preview Resettable

Wrap To Zero