根据全国电力系统控制及其通信标准委员会三届五次会议和最近出版的国标DL/T634.5.104: 2002对IEC60870-5-104规约的参数选择作了如下说明：不采用101规约中的链路地址和短报文（指单字节报文和链路确认报文）；不采用召唤一级数据二级用户数据。两个8位位组表示公共地址；两个8位位组表示传送原因；三个8位位组表示信息体地址；选用7个字节时标。定义了启动字符、应用服务数据单元的长度规范、可传输一个完整的应用规约数据单元或者为了控制的目的仅仅传输应用规约控制信息域。

-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.