Siemens SIMATIC S7 - 3.5 Pin Assignment; 3.6 Pin Assignment of Connecting Cables

F-CPU 1
Safety Program
DP Master I-slave 1
F_SENDDP: DP_DP_ID = 1
F_RCVDP: DP_DP_ID = 2
F-CPU 2
Safety Program
F_RCVDP: DP_DP_ID = 1
F_SENDDP: DP_DP_ID = 2
Master to I-slave communication
I-slave to I-slave communication
F_SENDDP: DP_DP_ID = 3
F_RCVDP: DP_DP_ID = 4
F_RCVDP: DP_DP_ID = 5
F_SENDDP: DP_DP_ID = 6
I-slave 2
F-CPU 3
Safety Program
F_RCVDP: DP_DP_ID = 6
F_SENDDP: DP_DP_ID = 5
F_RCVDP: DP_DP_ID = 3
F_SENDDP: DP_DP_ID = 4
!
Safety Note
The value for each address association (input parameter DP_DP_ID; data type:
INT) is user-defined; however, it must be unique from all other safety-related
communication connections in the network.
Note
A separate instance DP must be used for each call of an F SENDDP or F_RCVDP
block.
Product Information for the S7 Distributed Safety, Configuring and Programming Manual
A5E00169432-02
37