This video shows how to simulate IEC 60870-5-104 server using the freyrscada Simulator.

In this Simulating IEC 104 Monitoring and Command points with VTScada.
Simulate Complete IEC104 RTU Outstation Server
IEC 60870-5-104 Protocol Standard - Monitoring Information

ASDU Read Type Type Identification Type Identifier
SINGLEPOINT - M_SP_TA, M_SP_TB
SINGLEPOINTNOTIME - M_SP_NA, M_PS_NA,
DOUBLEPOINT - M_DP_TA, M_EP_TA, M_DP_TB, M_EP_TD
DOUBLEPOINTNOTIME - M_DP_NA
STEPPOSITION-M_ST_TA, M_ST_TB
STEPPOSITIONNOTIME - M_ST_NA
BITSTRING - M_BO_TA, M_BO_TB
BITSTRINGNOTIME - M_BO_NA
NORMALIZED - M_ME_TA, M_ME_ND, M_ME_TD
NORMALIZEDNOTIME - M_ME_NA
SCALED - M_ME_TB, M_ME_TE
SCALEDNOTIME - M_ME_NB
FLOAT - M_ME_TC, M_ME_TF
FLOATNOTIME - M_ME_NC
INTEGRATED - M_IT_TA, M_IT_TB
INTEGRATEDNOTIME - M_IT_NA


IEC 60870-5-104 Protocol Standard - Command ASDU

ASDU Read Type Type Identification Type Identifier
SINGLECOMMAND- 58 - C_SC_TA
DOUBLECOMMAND - 59 - C_DC_TA
REGSTEPCOMMAND - 60 - C_RC_TA
NORMALISEDCOMMAND - 61 -C_SE_TA
SCALEDCOMMAND - 62 - C_SE_TB
FLOATCOMMAND - 63 - C_SE_TC
BITSTRINGCOMMAND - 64 - C_BO_TA

If you need any assistance, mail to us.
tech.support@freyrscada.com.