描述
1756-L75 ControlLogix 增强型冗余系统
冗余功能使系统的可用性更强,它在主控制器机架中出现故障时,可将控制权切换到从控制器机架。当发生以下故障时,冗余系统会将控制权从主机架控制切换到从机架:
• 主机架掉电
• 主机架中的任何一个模块发生硬件或固件故障
• 主控制器的用户程序发生主要故障
• 主机架与远程 ControlNet 或 EtherNet/IP 模块之间的通信丢失
• 以太网插线电缆与主机架中的 EtherNet/IP 通信模块或ControlNet 通信模块的 ControlNet 线缆连接器断开连接。
• 在主机架中拔除或插入任何模块• 导致切换的用户命令
1756-L75 ControlLogix 增强型冗余系统
Redundancy makes the system more available by switching control to the slave controller rack in the event of a failure in the master controller rack. Redundant systems switch control from mainframe control to slave rack control when the following failures occur:
• The host is powered off
• A hardware or firmware failure occurs in any module of the mainframe
• A major failure occurs in the user program of the master controller
• Loss of communication between the mainframe and remote ControlNet or EtherNet/IP modules
• Disconnect the EtherNet cable from the EtherNet/IP communication module or ControlNet cable connector of the ControlNet communication module.
• Remove or insert any module in the host rack • The user command that causes the switch
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