→Vendor block

The interface for a vendor block (= vendor →function block or vendor →function) is created in an ST-object whereas t he implementation for a vendor block is created in →C.
Usually, a vendor block will be integrated in a custom library. But it is also possible to solely use a vendor block within the project in which the vendor block has been created.

Restrictions: The following variables are not supported in the interface of vendor blocks:

• →temporary variables (VAR_TEMP...END)
  If you need temporary variables without storing behavior, create them within the implementation functionality.

• →external variables (VAR_EXTERNAL...END)

Moreover, →methods are not supported for implementing a vendor block.

Information on creating a vendor block can be found under "Creating vendor blocks for the application or a library" .