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IEC61850--jiejuefangan
- IEC61580解决应用方按 值得借鉴 IEC61580解决应用方按 值得借鉴-Application of IEC61580 to resolve to learn side by side by the application of IEC61580 solution worth learning
kongjianhoufang
- 摄影测量空间后方解算程序,用vb编写,计算内方元素等-Photogrammetry Solution Spaces rear procedures, prepared by vb, side elements, such as the calculation of
chatroom
- 由TCP/IP架構的聊天室:只要在Server端與Client端之間互傳資料-By the TCP/IP architecture of the chat room: as long as the Server side and Client-side information to each other between
00897012
- Passive filter and active filter are two ahnative strategi- es to suppress harmonics in the electrical distribution system. Pas- sive filter is dc and efficient but it may cause the resonimce problem. Active film has become a mature tecblogy
Comments-on-the-Modbus
- Modbus 通信規約基本上是遵循Master and Slave 的通信步驟,有一方扮演Master 角色採取主動詢問方式,送出Query Message 給Slave 方,然後由Slave 方依據接到的Query Message 內容準備Response Message 回傳給Master。即使目前硬體通信已經可以達到雙方互相主動通信的能力,但是於Modbus 通信規約的規定,必須一方為Master,另一方為Slave 不能互換角色。一般使用上,監控系統(HMI)都為Master,PLC、電