opc協(xié)議-資料下載頁(yè)
2024-11-17 22:28本頁(yè)面
【正文】 ) floating point value.DoubleAn IEEE double precision (64 bit) floating point value.StringA sequence of Unicode characters.DateTimeAn instance in time.GuidA 16 byte value that can be used as a globally unique identifier.ByteStringA sequence of bytes.XmlElementAn XML element.NodeIdAn identifier for a node in the address space of a UA server.ExpandedNodeIdA NodeId that allows the namespace URI to be specified instead of an index.StatusCodeA numeric identifier for a error or condition that is associated with a value or an operation.DiagnosticInfoA structure that contains detailed error and diagnostic information associated with a StatusCode.ExtensionObjectA structure that contains an application specific data type that may not be recognized by the receiver. DataValueA data value with an associated status code and timestamps.VariantA union of all of the types specified above.遠(yuǎn)程測(cè)試和驗(yàn)證環(huán)境1，建立OPC設(shè)備2，遠(yuǎn)程O(píng)PC服務(wù)器測(cè)試3，建立與服務(wù)器的連接4，枚舉到的遠(yuǎn)程O(píng)P C服務(wù)器5，選擇需要的OPC服務(wù)器6，在給定OPC設(shè)備上建立數(shù)據(jù)通路，就是OPC組和OPC項(xiàng)7，將OPC組和OPC項(xiàng)與本地內(nèi)存變量進(jìn)行關(guān)聯(lián)，就能使用
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