_VAR 功能块的实现： FUNCTION_BLOCK

_VAR FB(); FUNCTION_BLOCK

_VAR FUNCTION_BLOCK FB

或全局变量列表到类的关联点（类型： FUNCTION_BLOCK [...] 和多个）。 FUNCTION_BLOCK Fb_C VAR [...] _A . FUNCTION_BLOCK Fb_C VAR

” to build function block interfaces for [...] Asynchronous function blocks

能将它们用作标识符： ACTION END_ACTION END_FUNCTION END_FUNCTION_BLOCK

.in_out; FUNCTION_BLOCK FB VAR

); FUNCTION_BLOCK FB VAR

'} FUNCTION_BLOCK FB1 VAR

_VAR FUNCTION_BLOCK FB METHOD