1 : INT VAR_INPUT a,b [...] 1 : INT VAR_INPUT a,b [...] _BLOCK FB1 VAR_INPUT b

接口的声明 检测声明 REFERENCE TO [...] REFERENCE TO ) 理由：接口 [...] 项目中定义的接口。 FUNCTION_BLOCK POU VAR_INPUT

> 参考： REFERENCE TO [...] 3 : REFERENCE TO INT; i [...] 8 : REFERENCE TO INT; var

_Test VAR_INPUT refTeststruct: REFERENCE TO TESTSTRUCT

PROGRAM PLC_PRG VAR_INPUT [...] _iTest : REFERENCE TO INT; END