Slide 12 of 30

Major differences between frame formats

Address size and format for source and destination are specified in DNP, a single address size is selected from several options in 101.

DNP only uses variable-length frames. IEC 870-5-101 uses single character ACK, fixed-length frames and variable-length frames.

Hamming distance is the number of single bit errors which must occur for a corrupted message to be mistaken for a valid message.