Access and embedding

The TC3 Plastic Technology Functions creates the corresponding INTERFACEs for each function block (FB). For a detailed description see INTERFACE concept. In this document the following naming rules are applied:

FB_Xyz: Declaration of a function block

fbXyz: an instance of FB_Xyz

I_Xyz: the INTERFACE declaration corresponding to FB_Xyz

iXyz: a variable of I_Xyz that is instantiated with fbXyz

sName := fbNcAxis1.Name        // not preferred
sName := iNcClamp1.Name        // preferred

It should be noted that TC3 Plastic Technology Functions creates two INTERFACEs with different information content for each function block of the axes. For example, FB_AxisBase has the interfaces I_AxisBase and I_AxisBaseDev. I_AxisBase contains the necessary functions of the axes for most common cases. In contrast, I_AxisBaseDev provides more information access and allows users to implement more complex functions. For the sake of simplicity and security, it is recommended to use the general interface (e.g. I_AxisBase).

iNcAxis1:             I_AxisNcBase := fbNcAxis1;
iNcAxis1Dev:          I_AxisNcBaseDev := fbNcAxis1; 

iHydAxis1:            I_AxisHydraulicBase := fbHydAxis1;
iHydAxis1Dev:         I_AxisHydraulicBaseDev := fbHydAxis1;

The following UML diagram shows the available interfaces of the individual axes and their inheritance structure.