Signal Storage Reuse

Optimize memory by reusing memory storage locations

Model Configuration Pane: PLC Code Generation / Optimization

Description

The Signal storage reuse parameter reuses signal memory.

Settings

on (default) | off

Default: on

On

Reuses memory buffers allocated to store block input and output signals, reducing the memory requirement of your real-time program.

Off

Allocates a separate memory buffer for each block's outputs. This allocation makes block outputs global and unique, which in many cases significantly increases RAM and ROM usage.

Tips

• This option applies only to signals with storage class Auto.

• Signal storage reuse can occur among only signals that have the same data type.

• Clearing this option can substantially increase the amount of memory required to simulate large models.

• Clear this option if you want to:

  • Debug a C-MEX S-function.

  • Use a Floating Scope or a Display block with the Floating display option selected to inspect signals in a model that you are debugging.

• If you select Signal storage reuse and attempt to use a Floating Scope or floating Display block to display a signal whose buffer has been reused, an error dialog box opens.

Recommended Settings

Application	Setting
Debugging	No impact
Traceability	No impact
Efficiency	On
Safety precaution	No impact

Programmatic Use

Parameter:PLC_PLCEnableVarReuse

Type: string

Value: 'on' | 'off'

Default: 'on'

Version History

Introduced in R2012b