6-6 869 MOTOR PROTECTION SYSTEM – COMMUNICATIONS GUIDE
INTEROPERABILITY CHAPTER 6: IEC 60870-5-104
Table 6-8: Cause of transmission assignments
Type identification Cause of transmission
No. Mnemonic 1234567891011121320 
to 
36
37 
to 
41
44 45 46 47
<1> M_SP_NA_1 ░ ░ ╳ ░ ░ ░ ░ ░ ░ ╳ ░ ░ ░ ░ ░
<2> M_SP_TA_1 ░ ░ █ ░ █ ░ ░ ░ ░ ░ █ █ ░ ░ ░ ░ ░ ░ ░
<3> M_DP_NA_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<4> M_DP_TA_1 ░ ░ █ ░ █ ░ ░ ░ ░ ░ █ █ ░ ░ ░ ░ ░ ░ ░
<5> M_ST_NA_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<6> M_ST_TA_1 ░ ░ █ ░ █ ░ ░ ░ ░ ░ █ █ ░ ░ ░ ░ ░ ░ ░
<7> M_BO_NA_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<8> M_BO_TA_1 ░ ░ █ ░ █ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<9> M_ME_NA_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<10> M_ME_TA_1 ░ ░ █ ░ █ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<11> M_ME_NB_1 ╳ ░ ╳ ░ ░ ░ ░ ░ ░ ░ ░ ╳ ░ ░ ░ ░ ░
<12> M_ME_TB_1 ░ ░ █ ░ █ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<13> M_ME_NC_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<14> M_ME_TC_1 ░ ░ █ ░ █ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<15> M_IT_NA_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ╳ ░ ░ ░ ░
<16> M_IT_TA_1 ░ ░ █ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ █ ░ ░ ░ ░
<17> M_EP_TA_1 ░ ░ █ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<18> M_EP_TB_1 ░ ░ █ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<19> M_EP_TC_1 ░ ░ █ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<20> M_PS_NA_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<21> M_ME_ND_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<30> M_SP_TB_1 ░ ░ ╳ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<31> M_DP_TB_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<32> M_ST_TB_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<33> M_BO_TB_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<34> M_ME_TD_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<35> M_ME_TE_1 ░ ░ ╳ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<36> M_ME_TF_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<37> M_IT_TB_1 ░ ░ ╳ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<38> M_EP_TD_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<39> M_EP_TE_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<40> M_EP_TF_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<45> C_SC_NA_1 ░ ░ ░ ░ ░ ╳ ╳ ╳ ╳ ╳ ░ ░ ░ ░ ░
<46> C_DC_NA_1 ░ ░ ░ ░ ░ ╳ ╳ ╳ ╳ ╳ ░ ░ ░ ░ ░
<47> C_RC_NA_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<48> C_SE_NA_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<49> C_SE_NB_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<50> C_SE_NC_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<51> C_BO_NA_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<58> C_SC_TA_1 ░ ░ ░ ░ ░ ╳ ╳ ╳ ╳ ╳ ░ ░ ░ ░ ░
<59> C_DC_TA_1 ░ ░ ░ ░ ░ ╳ ╳ ╳ ╳ ╳ ░ ░ ░ ░ ░
<60> C_RC_TA_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░
<61> C_SE_TA_1 ░ ░ ░ ░ ░ ░ ░ ░ ░ ░