HI,EVEVERYone,Iwant to test 800XA system IAC function.I created two apication A1and A2.create programm p0 in A1,create program p1 in A2.create IAC_VAR in A1.p0's communication tab,create IAC_VAR in A2.p1's communication tab,,but IAC communication fail,IAC_VAR'value is not updated in A2.p1 ,why?

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