DS200SDCCG5A GE

3HAC025544-003 ABB
3HAC025581-001 ABB
3HAC025623-001 ABB
3HAC025712-001 ABB
3HAC025729-002 ABB
3HAC025748-002 ABB
3HAC025780-001 ABB
3HAC025841-006 ABB
3HAC025917-001 ABB

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描述

PLC和编程器公用一个CPU,编程器在编程模式时,CPU只为编程器提供服务,不对现场设备进行控制。完成编程后,编程器切换到运行模式,CPU对现场设备进行控制,不能进行编程。离线编程方式可降低系统成本,但使用和调试不方便。在线编程方式:CPU和编程器有各自的CPU,主机CPU负责现场控制,并在一个扫描周期内与编程器进行数据交换,编程器把在线编制的程序或数据发送到主机,下一扫描周期,主机就根据新收到的程序运行。这种方式成本较高,但系统调试和操作方便,在大中型PLC中常采用。

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