Siemens SIMATIC PCS 7 Function Manual page 108

Advantages of fault-tolerant components
4.3 Communication connections
Requirements
● The PCS 7 project with a SIMATIC H station is open in SIMATIC Manager.
● Two DP master systems are configured for the SIMATIC H station in HW Config and these
● For commissioning: The PROFIBUS addresses are set with the DIL switches on the
● You can install a maximum of 5 FDC 157-0 DP/PA couplers, one coupler pair of which is
Hardware setting on the DP/PA coupler
Note
The redundancy mode set on the DP/PA coupler (DIL switch bit 7) must match the configured
redundancy mode:
● OFF: coupler redundancy (default setting)
● ON: ring redundancy (line redundancy)
If there is a discrepancy between the set redundancy mode and the configured redundancy
mode, a diagnostic message is generated.
Procedure
1. In the component view, select the SIMATIC H station and double-click the "Hardware"
2. If the hardware catalog is not visible, select the menu command View > Catalog.
3. In the current PCS 7 profile, double-click "PROFIBUS DP" and then "DP/PA Link".
4. Select the FDC 157-0 DP/PA coupler and drag it onto one of the two PROFIBUS DP lines.
5. Select shortcut menu command Object Properties.
6. Click "PROFIBUS".
7. Enter the PROFIBUS address (PROFIBUS DP) in the "Properties - PROFIBUS Interface
8. Open the "Network Settings" tab.
9. Select the "User-defined" item in the "Profile" list.
10.Click "Bus parameters...".
11.Ensure the value 3 is set for the "Retry Limit" parameter.
12.Click "OK" in the dialog boxes that were opened for this procedure.
13.Repeat steps 1 to 13 for the second DP/PA coupler for coupler redundancy.
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are used as connection paths for the redundant interface.
FDC 157-0 DP/PA couplers.
used at the end of the configuration in redundant mode.
object in the detail window.
HW Config opens.
The hardware catalog opens.
The "Properties - DP Slave" dialog box opens.
FDC 157-0" dialog box and click "OK".
The "Properties - PROFIBUS" dialog box opens.
Fault-tolerant Process Control Systems (V8.0)
Function Manual, 03/2012, A5E02779471-02