A two-step select-and-execute operation is possible only if the target DPC object’s control model is configured as select-before-operate (SBO). For most target DPC objects, the default control model setting mode is SBO.
IEC 60870-5-104 selection timeout is defined by the protocol instance’s Selection Timeout setting parameter. When a command is performed from the IEC 60870-5-104 instance, the selection timeout setting configured for the IEC 61850 DPC target object is overridden.