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With help of protocol parameters, you can configure a so-called alternative communication path for the particular station (only for SerialOverUDP Device Redundant and TCP/IP-UDP lines). If the communication via the standard path fails, the availability of communication via the alternative path (when configured) is tested. The communication via the alternative path uses UDP packets that are identical to packets used in SerialOverUDP Device Redundant line. The usage of the alternative path is signalized by the FLB flag and a combination of FLN, FLO, FLP flags in the station value.
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