1. Quick Introduction to Function Blocks

If you want to know C language，Please click here。

If you want to know editor，Please click here。

1. In the Engineering Explorer, right-click on the "Function Blocks" folder and open the context menu. Click "Add" → "Function Block".


图1 Add Function Block

2. When a "new function" appears, enter a suitable name.


图2 Rename

3. Double click on "New Function" to open a blank text area. Enter C language code.


图3 Enter code

4. This C language function adds parameter a and parameter b, and writes parameter c. Parameters a and b are of type int, and parameter c is of type cword, which is actually an int pointer.

5. Looking at the Engineering Resource Manager again, this function appears.


图4 Appearing Function

6. Drag the mouse to the editor and add the CALLM instruction that calls this function.


图5 Add CALLM

7. Fill in the parameters. Non pointer type parameters can be substituted into constants. The following program is equivalent to ADDD D0 K10 D2.


图6 Fill in parameters