Creating Library Help

[MarkM]

Hi All, 

Our customers are looking to use our product with Machine Expert. I am in the process of building a library to simplify implementation and usage.

1. Is there a help or tutorial to review which may help with best practices etc?
2. I have multiple function blocks that can influence each other. Is there a way to share variables without them being visible to the user? I can easily create a structure that has what I need but I don't want it seen by the user. Essentially looking for the equivalent to an internal variable in a dll.

Thanks

Mark

[MarkM · Accepted solution]

I believe I answered my own question. Use the word INTERNAL.

Example:

VAR_GLOBAL INTERNAL
test : INT := 5;
END_VAR

This GVL is now not exposed outside of the library.

[nabinz]

Hi.. Mark I have tried to implement your solution. 

Where I have multiple blocks that would influence each other I was planning to create a GVL and route all the variables through it. But When I tried to create a VAR_GLOBAL INTERNAL as mentioned by you. My POUs which are some FBs not recognizing the global variable


Eg:
VAR_GLOBAL INTERNAL
test : INT := 5;
END_VAR