描述
IC695ALG704
FCS对计算机控制系统的影响
传统的计算机控制系统一般采用DCS结构。在DCS中,对现场信号需要进行点对点的连接,并且I/O端子与PLC或自动化仪表一起被放在控制柜中,而不是放在现场。这就需要铺设大量的信号传输电缆,布线复杂,既费料又费时,信号容易衰减并容易被干扰,而且又不便维护。DCS一般由操作员站、控制站等组成,结构复杂,成本高。而且DCS不是开放系统,互操作性差,难以实现数据共享。而基于PC的FCS则完全克服了这些缺点。
在FCS中,借助于现场总线技术,所有的I/O模块均放在工业现场,而且所有的信号通过分布式智能I/O模块在现场被转换成标准数字信号,只需一根电缆就可把所有的现场子站连接起来,进而把现场信号非常简捷地传送到控制室监控设备上,降低了成本,又便于安装和维护,同时数字化的数据传输使系统具有很高的传输速度和很强的抗干扰能力。
FCS具有开放性。在FCS中,软件和硬件都遵从同样的标准,互换性好,更新换代容易。程序设计采用IEC1131-3五种国际标准编程语言,编程和开发工具是完全开放的,同时还可以利用PC丰富的软硬件资源。
系统的效率大为提高。在FCS中,一台PC可同时完成原来要用两台设备才能完成的PLC和NC/CNC任务。在多任务的Windows NT操作系统下,PC中的软PLC可以同时执行多达十几个PLC任务,既提高了效率,又降低了成本。且PC上的PLC具有在线调试和仿真功能,极大地改善了编程环境。在FCS中,系统的基本结构为:工控机或商用PC、现场总线主站接口卡、现场总线输入/输出模块、PLC或NC/CNC实时多任务控制软件包、组态软件和应用软件。上位机的主要功能包括系统组态、数据库组态、历史库组态、图形组态、控制算法组态、数据报表组态、实时数据显示、历史数据显示、图形显示、参数列表、数据打印输出、数据输入及参数修改、控制运算调节、报警处理、故障处理、通信控制和人机接口等各个方面,并真正实现控制集中、危险分散、数据共享、完全开放的控制要求。
产品承诺:
保 证 全新原装进口,
保 证 安全准时发货,
保 证售后服务质量,
优势价格,大量现货。
主营DCS系统配件
机器人系统配件
大型伺服系统配件
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专业销售进口DCS PLC系统备件模块
PLC模块,可编程控制器,CPU模块,IO模块,AI模块,通讯模块。AB/施耐德/ABB/GE/本特利/西屋/英维斯/霍尼韦尔/黑马/FU克斯波罗
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