GE模塊IC697CPM790RRGMR Redundancy CPU, 486, 2K Triplex (voted) I/O
GE模塊IC697CPM790RRGMR Redundancy CPU, 486, 2K Triplex (voted) I/O
什么叫控制柜和DCS的接線？DCS是個龐大的系統(tǒng)，包含I/O處理卡、控制站、上位機、服務(wù)器等等。其中I/O處理卡、控制站
基本都安裝于控制柜中
硬接線：指的是信號直接點對點的接線方式，安全可靠，用線量大，工作量大。
Modbus：一種串口通信協(xié)議，多采用RS-485模式，分為Modbus-Rtu、Modbus-ASII、Modbus-TCP/IP,通信速率有限，本身不
做數(shù)據(jù)處理，多用于DCS與現(xiàn)場智能設(shè)備或者小型PLC通信。
OPC：文件服務(wù)器，處理量大、速度快，一般專設(shè)OPC服務(wù)器，用于DCS與外部系統(tǒng)，尤其是全廠監(jiān)控系統(tǒng)、數(shù)據(jù)系統(tǒng)連接。
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