| FUNCTION_BLOCK | METHOD [...] 声明部分 PRG , FUNCTION_BLOCK [...] 远程直接读取或写入 <function block instance

_VAR 功能块的实现： FUNCTION_BLOCK

_VAR FB(); FUNCTION_BLOCK

_VAR FUNCTION_BLOCK FB

.in_out; FUNCTION_BLOCK FB VAR

); FUNCTION_BLOCK FB VAR

'} FUNCTION_BLOCK FB1 VAR

_VAR FUNCTION_BLOCK FB METHOD

.Prop; FUNCTION_BLOCK FB VAR

_VAR FUNCTION_BLOCK FB VAR