GE DS200SVAAG1A电压衰减器板
主和备份CI854A需要PROFIBUS上的不同节点地址。当通过硬件配置编辑器中的设置配置主节点地址时，备份模块的节点地址由主模块节点地址的固定偏移量-1定义。因此，您不能使用CI854/CI854A在PROFIBUS上配置节点地址0。这是为冗余而保留的。在正常操作期间，只有主CI854A与从单元通信。备份单元处于热备用模式。它由控制器配置，并由主单元同步。如果由于例如受干扰的PROFIBUS通信而发生故障切换，则主模块和备份模块会更改节点地址。在故障切换期间，前一个主模块将被重置。
Primary and backup CI854A need different node addresses on PROFIBUS. While
the primary node address is configured via the settings in the HW Configuration
Editor the node address for the backup module is defined by the fixed offset -1 to the
node address of the primary module. Therefore you cannot configure the node
address 0 on PROFIBUS with CI854/CI854A. This is reserved for redundancy.
During normal operation only the primary CI854A has communication with the
slave units. The backup unit is in hotstandby mode. It is configured by the controller
and synchronized by the primary unit. If there is a failover because of for example a
disturbed PROFIBUS communication, primary and backup module change the node
addresses. During failover the former primary module will get reset.
