Siemens SIMATIC S7 Configuration And Programming Manual page 15

How to Configure Master to I-Slave Communication
The figure below illustrates the configuration procedure for the address areas in the
previous figure.
Requirement:
You have created a project in STEP 7.
1. Create a station in your project (in SIMATIC Manager, for example, an S7-300
station).
2. Assign a CPU with fail-safe capability to this station (in HW Config, from the
hardware catalog).
3. Configure this CPU as a DP slave (in HW Config, in the "Operating Mode" tab
of the Object Properties for the DP interface of the CPU).
4. Create another station and assign a CPU with fail-safe capability (see steps 1
and 2).
5. Configure this CPU as a DP master (in HW Config, in the "Operating Mode" tab
of the Object Properties for the DP interface of the CPU).
6. In the hardware catalog, under "Configured stations," select the station type of
the I-slave (for example, the "CPU 31x") and place it on the DP master system.
7. Link the I-slave to the DP master in the Connection dialog box that opens
automatically.
You can now specify the address areas for the safety-related master to I-slave
communication:
8. In the "F-Configuration" tab of the Object Properties of the I-slave, select
"New."
9. In the next dialog, make the following entries for the receive connection from
the DP master for our example:
For "Mode: F-MS-R" (receive over a fail-safe master to I-slave
-
communication)
For "DP partner (sender): address (LADDR): 2048"
-
For "local (receiver): address (LADDR): 256"
-
Accept the defaults for the other parameters in the dialog.
-
The dialog appears as shown below:
Product Information for the S7 Distributed Safety, Configuring and Programming Manual
A5E00169432-02
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