Double Bit input (object type 3) is supported by the protection relay. Double point objects are derived from the protection relay's internal data class DPC, that is, circuit breaker and disconnector position data. An alternative DNP3 analog input data always exists for the double point data. If the DNP3 client does not support object type 3, the analog input is the only other alternative for representing the double point value in one DNP3 data object.
The size of the DNP3 Double Bit input event buffer is 100.