IEC Data Length & Mapping Orientation
Original instructions
About us
IEC 60870-5-101/104
Only data object values are mapped. The quality descriptors for monitoring direction data object and qualifier for control direction data object are not mapped:
Data object type
Data length (bits)
Orientation
Availability
Master
Slave/Server
101
104
M_SP
1
Mod -> CPU
CPU -> Mod
x
x
M_DP
2
Mod -> CPU
CPU -> Mod
x
x
M_ST
8
Mod -> CPU
CPU -> Mod
x
x
M_BO
32
Mod -> CPU
CPU -> Mod
x
x
M_ME_A
16
Mod -> CPU
CPU -> Mod
x
x
M_ME_B
16
Mod -> CPU
CPU -> Mod
x
x
M_ME_C
32
Mod -> CPU
CPU -> Mod
x
x
M_IT
32
Mod -> CPU
CPU -> Mod
x
x
C_SC
1
CPU -> Mod
Mod -> CPU
x
x
C_RC
2
CPU -> Mod
Mod -> CPU
x
x
C_SE_A
16
CPU -> Mod
Mod -> CPU
x
x
C_SE_B
16
CPU -> Mod
Mod -> CPU
x
x
C_SE_C
32
CPU -> Mod
Mod -> CPU
x
x
C_BO
32
CPU -> Mod
Mod -> CPU
x
x
C_IC
16
CPU -> Mod
na
x
x
C_CI
16
CPU -> Mod
na
x
x
C_RD
16
CPU -> Mod
na
x
x
C_CS
16
CPU -> Mod
na
x
x
C_TS
16
CPU -> Mod
na
x
x
C_RP
16
CPU -> Mod
na
x
x
P_ME_A
16
CPU -> Mod
Mod -> CPU
x
x
P_ME_B
16
CPU -> Mod
Mod -> CPU
x
x
P_ME_C
32
CPU -> Mod
Mod -> CPU
x
x
P_AC_A
16
CPU -> Mod
Mod -> CPU
x
x