Redundancy State

This chapter describes which function can be used to obtain redundancy information.

A WinCC OA project can be set up redundantly, whereby two WinCC OA servers (referred to below as "left" and "right") are used. A failure on one side is compensated by the other side. One of the servers is always the "active" one, which sends data to peripheral devices and serves user interfaces; the other server is the "passive" one, which keeps a copy of the state of the active server.

To obtain the redundancy information, call the function requestRedundancyInfoSynchronously. The result of the function is data of the RedundancyInfo type.

if (!directReadMode)
{
    RedundancyInfo redundancyInfo = configChannelHandler.requestRedundancyInfoSynchronously();
}

For more information on redundancy, see the subchapter Redundancy Architecture.