6-4 UR FAMILY – COMMUNICATIONS GUIDEINTEROPERABILITY DOCUMENT CHAPTER 6: IEC 60870-5-104 COMMUNICATION6Either the ASDUs of the set <2>, <4>, <6>, <8>, <10>, <12>, <14>, <16>, <17>, <18>, and <19> or of the set <30> to<40> are used.Process information in control directionEither the ASDUs of the set <45> to <51> or of the set <58> to <64> are used.System information in monitor directionSystem information in control directionParameter in control directionFile transfer <45> := Single command C_SC_NA_1 <46> := Double command C_DC_NA_1 <47> := Regulating step command C_RC_NA_1 <48> := Set point command, normalized value C_SE_NA_1 <49> := Set point command, scaled value C_SE_NB_1 <50> := Set point command, short floating point value C_SE_NC_1 <51> := Bitstring of 32 bits C_BO_NA_1 <58> := Single command with time tag CP56Time2a C_SC_TA_1 <59> := Double command with time tag CP56Time2a C_DC_TA_1 <60> := Regulating step command with time tag CP56Time2a C_RC_TA_1 <61> := Set point command, normalized value with time tag CP56Time2a C_SE_TA_1 <62> := Set point command, scaled value with time tag CP56Time2a C_SE_TB_1 <63> := Set point command, short floating point value with time tag CP56Time2a C_SE_TC_1 <64> := Bitstring of 32 bits with time tag CP56Time2a C_BO_TA_1 <70> := End of initialization M_EI_NA_1 <100> := Interrogation command C_IC_NA_1 <101> := Counter interrogation command C_CI_NA_1 <102> := Read command C_RD_NA_1 <103> := Clock synchronization command (see Clause 7.6 in standard) C_CS_NA_1 <104> := Test command C_TS_NA_1 <105> := Reset process command C_RP_NA_1 <106> := Delay acquisition command C_CD_NA_1 <107> := Test command with time tag CP56Time2a C_TS_TA_1 <110> := Parameter of measured value, normalized value PE_ME_NA_1 <111> := Parameter of measured value, scaled value PE_ME_NB_1 <112> := Parameter of measured value, short floating point value PE_ME_NC_1 <113> := Parameter activation PE_AC_NA_1 <120> := File Ready F_FR_NA_1 <121> := Section Ready F_SR_NA_1 <122> := Call directory, select file, call file, call section F_SC_NA_1 <123> := Last section, last segment F_LS_NA_1 <124> := Ack file, ack section F_AF_NA_1 <125> := Segment F_SG_NA_1