描述
国外传统DCS厂家的控制器差别不大,但操作站区别较大。分以PC机和小型机为基础两类。小型机价格比PC机高很多,且许多机型已停产。PC机操作系统用NT,稳定性虽没UNIX好,但作为操作站使用足够。小型机接口用SCSI,传输速率理论上是串行20倍之多。以NT操作系统作为操作站,如采用串行连接,点数(标签数)能少一些,这与硬件配置有关
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