资 源 简 介
资源描述VB6.0 OPC PPI S7-200通讯 Private MyOPCServer As OPCServer " OPCServer Object
Private MyGroups As OPCGroups " OPCGroups Collection Object
Private WithEvents MyGroup As OPCGroup " OPCGroup Object
Private MyItems As OPCItems " OPCItems Collection Object
Private MyItemServerHandles() As Long " Server Handles for Items
Dim MyTID As Long " Transaction ID for asynchronous calls
