base functionality
copy base revision [...] = 4 ¶ Base = 5
_MESSAGE : STRING[50]; // base
addition to base size
used as base for
reinitialization of the base
used as a base for
same base principle
FUNCTION_BLOCK MyBase [...] FB EXTENDS MyBase [...] FB // ... MyBaseFB DIT 为 0
这个例子展示了如何实现 VisuElems.VisuElemBase