automata - Hierarchical State Machine in IEC 61131-3

Question

I would like implement a HSM in 61131-3. Doing some reading I understand that HSM's are a sort of subset of pushdown automata?

Most of the examples from other languages are using pointers and references, which I would like to avoid. Is it feasible to implement a HSM without using pointers or references?

I guess I need an event stack and a stack for the nesting of the stack?

Thanks

Answer 1

如果您的编程软件 SFC（顺序功能图）支持它，那么您可能正在寻找它。SFC 是一种基于动作和转换的图形编程语言。它避免了指针，是五种 IEC 61131-3 语言之一。