Introduction - If you have any usage issues, please Google them yourself
National Power System Control and Communications Standards Committee meetings and three of five recently published in accordance with the national standard DL/T634.5.104: 2002 parameters IEC60870-5-104 Statute choice made the following instructions: do not use 101 Statute link address and a short message (refer to single-byte packets and link acknowledgment packet) do not use a data call two user data. Two 8-bit group, said the public address two 8-bit group, said transmission causes three 8-bit physical address information indicating the group selection of 7 bytes time scale. Defines the start character, application service data length specification unit can transmit a complete application protocol data unit or merely for the purpose of control transfer application protocol control information field.