ABB YXU168E YT204001-JB模块卡件
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在线更换单元在线需要在控制器中添加或删除单元，而不干扰正在运行的应用程序的执行。设备连接到CEX总线和电气模块总线（S800 I/O）。CEX总线通信接口（CI8xx）可以在线移除或更换。限制条件适用，请参阅每个接口的安装章节和附录A“硬件单元”。CI8xx（TP8xx）底板不得在线更换。ModuleBus S800 I/O单元可在线移除或更换。模块终端单元（MTU）不得在线更换冗余CPU处理器单元可在线拆除或更换（参见下一页）RCU链路电缆可在线拆除和更换。但是，以下限制适用：；您不能在4.1之前的软件版本中在线更换RCU链接电缆。有关更多信息，请参阅在线更换有缺陷的RCU链路电缆中的说明
Online Replacement of Unit Replacement online entails adding or removing units in a controller without disturbing the execution of the running application program. Units are connected to the CEX-Bus and the electrical ModuleBus (S800 I/O).CEX-Bus Communication interfaces (CI8xx) Can be removed or replaced online. Restrictions apply, refer to the installation section for each interface and to Appendix A, Hardware Units. Baseplates for CI8xx (TP8xx) Must not be replaced online. ModuleBus S800 I/O units Can be removed or replaced online. Module Terminal Units (MTUs) Must not be replaced online Redundant CPUs Processor unit Can be removed or replaced online (see the next following pages) RCU Link Cables Can be removed or replaced online. However, the following restriction applies; you cannot replace the RCU link cable online in a previous than 4.1 software version. For more information, see the instructions given in Exchanging a Defect RCU Link Cables Online
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