VE3006 12P3439X012工控模塊,EMERSON產品尺寸
冗余內存交換（RMX）模塊作為反射內存上的節點運行網絡或作為冗余RX7i系統中CPU之間的專用鏈路。當RMX為它不用作冗余系統中的鏈路，功能與IC698CMX016相同單元網絡中的每個節點都可以是與兼容的任何反射內存設備5565家庭。每當數據寫入一個節點時，網絡上的所有節點都是使用新數據自動更新。
VE3006 12P3439X012工控模塊當用作反射內存網絡上的節點時，RMX模塊提供確定性在高速光纖網絡上的PLC和其他計算設備之間共享數據。反射內存網絡最多可包含256個節點。反射內存網絡中的每個節點使用光纖連接在菊花鏈環路中光纜。第一個節點的發射器與第二個節點的接收器相連。這個第二個節點的發射器與第三個節點的接收器相連，依此類推，直到環路結束在第一個節點的接收器處完成。在CPU冗余系統中使用時，RMX模塊提供傳輸數據的路徑在冗余系統中的兩個冗余CPU之間。完整的通信路徑由一次機組中的一個RMX、二次機組中的一個RMX和兩個高速相互連接的光纖電纜。這必須是一個兩節點環：沒有其他反射內存節點允許成為該光纖網絡的一部分。GE強烈建議使用兩個冗余鏈路（共四個RMX模塊）已配置并安裝。可選地，可以為單個冗余鏈路（a）配置系統共兩個RMX模塊）。當RMX用作冗余系統中的鏈路時，它不能用作通用內存交換模塊。有關PACSystems CPU操作的詳細信息冗余系統，請參閱PACSystems熱備CPU冗余用戶手冊，GFK-2308。PACSystems RX7i主機架最多支持四個內存交換模塊RMX016和CMX016模塊的組合。最多可以使用兩個RMX模塊配置為冗余通信鏈路。
The Redundancy Memory Xchange (RMX) module operates as a node on a reflective memory
network or as a dedicated link between CPUs in a redundant RX7i system. When the RMX is
not being used as a link in a redundancy system, it is functionally identical to the IC698CMX016
module. Each node in the network can be any reflective memory device that is compatible with
the 5565 family. Whenever data is written to one node, all nodes on the network are
automatically updated with the new data.
When used as a node on a reflective memory network, the RMX module provides deterministic
sharing of data among PLCs and other computing devices on a high-speed fiber optic network.
A reflective memory network can contain up to 256 nodes.
Each node in the reflective memory network is connected in a daisy-chained loop using fiber
optic cables. The transmitter of the first node is tied to the receiver of the second. The
transmitter of the second node is tied to the receiver of the third node, and so on, until the loop
is completed at the receiver of the first node.
When used in a CPU redundancy system, the RMX modules provide a path for transferring data
between the two redundancy CPUs in the redundant system. A complete communications path
consists of one RMX in the primary unit, one RMX in the secondary unit, and two high-speed
fiber optic cables connecting them to each other. This must be a two-node ring: no other
reflective memory nodes are allowed to be part of this fiber optic network.
GE strongly recommends two redundancy links (a total of four RMX modules) be
configured and installed. Optionally, systems can be configured for a single redundancy link (a
total of two RMX modules).
When the RMX is being used as link in a redundancy system, it cannot be used as a generalpurpose Memory Xchange module. For details on the operation of a PACSystems CPU
redundancy system, refer to the PACSystems Hot Standby CPU Redundancy User’s Manual,
GFK-2308.
