How to Assign F-CPUs to F_SENDDP/F_RCVDP
Assign the F-CPUs to F_SENDDPs/F_RCVDPs as follows:
Configure the address areas (local and partner addresses) for the DP master
and the I-slave(s) in HW Config (see Sections 1.1.1, 1.1.3 and 1.1.4)
•
•
•
Specify the following for master to I-slave communication in the safety program
of the F-CPU of the DP master:
- in F_SENDDP for input parameter LADDR, the partner address for sending
("F-Configuration" tab: Row Mode: "F-MS-S")
- in F_RCVDP for input parameter LADDR, the partner address for receiving
("F-Configuration" tab: Row Mode: "F-MS-R")
Specify the following for master to I-slave or I-slave to I-slave communication in
the safety program of the F-CPU of an I-slave:
- in F_SENDDP for input parameter LADDR, the local address for sending
("F-Configuration" tab: Row Mode: "F-MS-S" or "F-DX-S")
- in F_RCVDP for input parameter LADDR, the local address for receiving
("F-Configuration" tab: Row Mode: "F-MS-R" or "F-DX-R")
Make these assignments for each F-CPU involved.
Note
The settings for safety-related master to I-slave and I-slave to I-slave
communication are always as follows:
• For F_SENDDP/F_RCVDP of the DP master always enter the partner
addresses for the communication connections (from HW Config,
"F-Communication" tab of the I-slave).
• For F_SENDDP/F_RCVDP of a DP slave always enter the local addresses
for the communication connections (from HW Config, "F-Communication" of
the I-slave).
Programming Procedure
The procedure for programming safety-related master to I-slave communication or
I-slave to I-slave communication is exactly the same as for programming safety-
related master to master communication. Refer to Section 5.4 of the manual.
In the schematic below, the example from the manual is simply adapted to specify
the address relationships at the inputs of the F application blocks F_SENDDP and
F_RCVDP for two safety-related master to I-slave and one I-slave to I-slave
communication relations.
Product Information for the S7 Distributed Safety, Configuring and Programming Manual
36 A5E00169432-02
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