Using Function

You can latch input data for Inport blocks within Function-Call Subsystem blocks to ensure data integrity. To latch input data, in the Inport block parameters, select Latch input for feedback signals of function-call subsystem outputs.

In the following model, input data for the Inport block in the function-call subsystem ReadDSAndCal1 is latched (indicated by ) and cannot change during the execution of the subsystem. The Data Store Read and Data Store Write blocks are called within each function-call subsystem. The first and second function-calls write data and the last function-call reads data to the Data Store Memory block.

Note

The root-level data Inport block connected to an internal Inport block is also latched if all of the blocks connected to the root-level block are latched. For more information, see Latch input for feedback signals of function-call subsystem outputs.

Note

Data transfer signals are unprotected in the generated code by default. Use custom storage classes to prevent data corruption in these signals due to preemption of the current task in the target environment.