National Instruments PXI-8330 MXI-3

National Instruments PCI-6503
National Instruments UMI-7764
National Instruments PCI-8335 MXI-3
National Instruments NI PC-DIO-24/PnP
National Instruments AT-GPIB/TNT 182885E-01
National Instrument PXI-6533
NATIONAL INSTRUMENTS R1005050 182762B-01

分类:

Description

DCS在发展的过程中也是各厂家自成体系,但大部分的DCS系统,比如西门子、ABB、霍尼维尔、GE、施耐德等等,虽说系统内部(过程级)的通讯协议不尽相同,但操作级的网络平台不约而同的选择了以太网络,采用标准或变形的TCP/IP协议。这样就提供了很方便的可扩展能力。在这种网络中,控制器、计算机均作为一个节点存在,只要网络到达的地方,就可以随意增减节点数量和布置节点位置。另外,基于windows系统的OPC、DDE等开放协议,各系统也可很方便的通讯,以实现资源共享。

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