InstIdx Enumeration in Subchains

[Andre_M]

When using several subtrees in the project (OES4.10), I can't name the ENUM elements of the InstIdx equally, although they should be unique via the ENUM name. Is this a bug in the OES or is it intentional?

[maj9bj · Accepted solution]

You cannot the use same instance names only in the same hierarchy (parent) level, like on the picture.

But if you encapsulate instances into separated command handlers, same indexes will work. See picture 2.

[nexidator · Accepted solution]

As you can see by the error message, it is intentional. The reason is that the configuration format of several runtime components (e.g. HMI) only contains the enumeration item name at the subtree reference level. So the names would not be unique there.

In Control plus V2, we have changed the configuration formats of all affected components, so this restriction does not apply anymore.