AMAT   0100-71267 计数器模块

【功能描述】

Applied Materials在一组冗余设备中，一个链接设备充当主设备，并主动执行所有通信功能，包括H1链路上的链路主动调度器（LAS）功能。在冗余集中，主机和配置工具必须对主设备进行寻址。第二个链接设备名为Secondary device，用作备份设备。

AMAT   0100-71267 计数器模块它自动接收与主设备相同的配置，但在H1链路上使用不同的节点地址，在HSE上使用不同IP地址。如果主设备发生故障，辅助设备可以接管主设备的功能。在这种情况下，链接设备被简化为不能够容忍任何进一步故障的非冗余系统。

AMAT   0100-71267 计数器模块因此，有必要尽快更换有缺陷的设备以恢复冗余。如果需要，辅助设备充当每个H1链路上的备份链路主机，试图接管LAS角色。附加链路主设备可以被配置为充当H1链路上的备份链路主设备。形成冗余集的两个设备通过串行通信线（RS-232）和以太网进行通信。串行线用于建立一组冗余设备、交换生命迹象和控制冗余切换，而以太网用于将配置信息从主设备传输到辅助设备。

AMAT   0100-71267 计数器模块因此，两个设备之间的操作串行通信路径和操作以太网路径是正确操作所必需的。形成一组冗余设备的两个物理链路设备由它们之间的串行链路确定。在没有串行链路的情况下，两个设备都像独立的、非冗余的主设备一样工作。

AMAT   0100-71267 计数器模块

In a set of redundant devices, one linked device acts as the master device and actively performs all communication functions, including the link active scheduler (LAS) function on the H1 link. In a redundant set, hosts and configuration tools must address the primary device. The second linked device is called Secondary device and is used as a backup device.

AMAT 0100-71267 Counter module It automatically receives the same configuration as the main device, but uses a different node address on the H1 link and a different IP address on the HSE. If the primary device fails, the secondary device can take over the functions of the primary device. In this case, the linked device is reduced to a non-redundant system that cannot tolerate any further failure.

AMAT 0100-71267 Counter module It is therefore necessary to replace defective equipment as soon as possible to restore redundancy. If needed, the secondary device acts as a backup link host on each H1 link, attempting to take over the LAS role. The attached link master can be configured to act as a backup link master on the H1 link. The two devices that form a redundant set communicate over a serial communication line (RS-232) and Ethernet. Serial lines are used to establish a set of redundant devices, exchange vital signs, and control redundant switching, while Ethernet is used to transfer configuration information from the primary device to the secondary device.

AMAT 0100-71267 Counter module Therefore, the operational serial communication path and the operational Ethernet path between the two devices are necessary for proper operation. The two physical link devices that form a set of redundant devices are determined by the serial link between them. In the absence of a serial link, both devices function as independent, non-redundant primary devices.

AMAT   0100-71267 计数器模块

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