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what is the difference between data store memory and goto-from blocks ?

Asked by Noufal Thangal Rahim on 13 Sep 2018
Latest activity Commented on by Titus Edelhofer on 14 Sep 2018
in this example given in the page-> Model Global Data by Creating Data Stores
Data store memory (read/write) is used for getting the Error to switch between two values.
Instead, why can't the goto- from blocks be used ?

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1 Answer

Answer by Titus Edelhofer on 13 Sep 2018
 Accepted Answer

Hi Noufal,
the main difference is, that data store memory and read/write remove the dependency between reading and writing, i.e., the data flow: you can read and write anywhere in the model at any time.
In contrast the from-goto blocks are like having a connection between the goto and the from (it's only a different representation, instead of drawing a line you use the from/goto). But the data dependency stays intact.
Titus

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Using a DSM sounds like it would give problems if it is an input into an algebraic loop.
That's a good remark: depending on how connected, execution order might be changed to have no algebraic loops ...

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