Commissioning the Y Link
7-2
DP/PA Link and Y Link Bus Couplings
A5E00193841-011
7.2 Configuring the Y link
The Y link is configured in STEP 7.
Step Activity
1 Start STEP 7 and open your SIMATIC H station in HW Config.
2 From the
PROFIBUS-DP\DP/PA-Link directory in the hardware catalog, drag an IM 157
(MLFB: 6ES7 157-0AA82-0XA0) to the redundant DP master system of an
S7-400H.
Result: The properties dialog for the PROFIBUS interface of the IM 157 is
displayed.
3 Change the suggested address of the IM 157 in the higher level DP master
system if necessary.
Result: After closing this dialog, another dialog appears for selecting the
underlying master system.
4 Select PROFIBUS-DP and confirm with OK.
Result: The Y link is inserted in the redundant DP master system. The
transmission rate of the underlying DP master system is preset to 1.5 MBaud.
5 If you wish to change the transmission rate of the underlying DP master system,
double click on the system. Result: A dialog with the properties for the
underlying master system is displayed.
Select the Properties... button. Result: The PROFIBUS properties dialog
appears.
In the Network settings tab, select a transmission rate between 45.45 kBaud
and 12 MBaud and confirm with OK.
DPV0 or DPV1 slave
The IM 157 can only be operated as a DPV1 slave in combination with a DPV1
master. The additional functions (acyclical services) of a DPV1 slave can only be
used if this is the case.
Switchover time in redundant operation
Notice
Due to changes to the bus parameters in STEP 7 V5.2, longer switchover times in
the H system may result when the IM 157 is used as a redundant DP slave.
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