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6-8 UR FAMILY – COMMUNICATIONS GUIDE
INTEROPERABILITY DOCUMENT CHAPTER 6: IEC 60870-5-104 COMMUNICATION
6
 Single point information: M_SP_NA_1, M_SP_TA_1, M_SP_TB_1, and M_PS_NA_1
 Double point information: M_DP_NA_1, M_DP_TA_1, and M_DP_TB_1
 Step position information: M_ST_NA_1, M_ST_TA_1, and M_ST_TB_1
 Bitstring of 32 bits: M_BO_NA_1, M_BO_TA_1, and M_BO_TB_1 (if defined for a specific project)
 Measured value, normalized value: M_ME_NA_1, M_ME_TA_1, M_ME_ND_1, and M_ME_TD_1
 Measured value, scaled value: M_ME_NB_1, M_ME_TB_1, and M_ME_TE_1
 Measured value, short floating point number: M_ME_NC_1, M_ME_TC_1, and M_ME_TF_1
Station interrogation
Clock synchronization
 Clock synchronization (optional, see Clause 7.6)
Command transmission
 Direct command transmission
 Direct setpoint command transmission
 Select and execute command
 Select and execute setpoint command
 C_SE ACTTERM used
 No additional definition
 Short pulse duration (duration determined by a system parameter in the outstation)
 Long pulse duration (duration determined by a system parameter in the outstation)
 Persistent output
 Supervision of maximum delay in command direction of commands and setpoint commands
Maximum allowable delay of commands and setpoint commands: 10 s
Transmission of integrated totals
 Mode A: Local freeze with spontaneous transmission
 Mode B: Local freeze with counter interrogation
 Mode C: Freeze and transmit by counter-interrogation commands
 Mode D: Freeze by counter-interrogation command, frozen values reported simultaneously
 Counter read
 Counter freeze without reset
 Counter freeze with reset
 Counter reset
 General request counter
 Request counter group 1
 Request counter group 2
 Request counter group 3
 Request counter group 4
 Global
 Group 1  Group 5  Group 9  Group 13
 Group 2  Group 6  Group 10  Group 14
 Group 3  Group 7  Group 11  Group 15
 Group 4  Group 8  Group 12  Group 16