Main Content

jc_0623: Usage of continuous-time Delay blocks and discrete-time Delay blocks

Since R2020a

Guideline Publication

Control Algorithm Modeling Guidelines - Using MATLAB®, Simulink®, and Stateflow®

Sub ID Recommendations

  • NA-MAAB — a

  • JMAAB — a

MATLAB Versions



Sub ID a

Unit Delay or Delay blocks shall be used in a discrete model or subsystem.

A Memory block shall be used in a continuous type model or subsystem.

Custom Parameter

Not Applicable

Example — Correct

A Unit Delay block is used in the discrete type model.

Example — Incorrect

A Memory block is used in the discrete type model.


Sub ID a:

  • Adherence to the rule improves readability of the model.


Model Advisor check: Check usage of Memory and Unit Delay blocks (Simulink Check)

Last Changed


Version History

Introduced in R2020a