Lenze Drive Server Bus server S7 getting started - Manual (Page 20)

Busserver S7
L
81 Busserver S7 DE/EN 1.0
4.2.8 Configuration of sub-systems
If the PLC connected to the PC includes a ”routing function”, it is possible to access controllers which
are not connected to the PROFIBUS of the (master) PLC, but to the PROFIBUS of a lower-level PLC.
The below figure shows an example of such an architecture:
• In this example, the SIMATIC 400 is the master PLC and directly connected to the PC via
Ethernet.
• The SIMATIC 300 is used as sub-system to which a controller is connected via PROFIBUS.
• The master PLC and the sub-system are connected via an MPI connection.
• Please consider that both the PLCs and the PC have to be added to the STEP 7 project.
– Use the ”NetPro” STEP 7 service program to do so.
Configuration steps required
The following configuration steps have to be carried out to access the controller connected to the
sub-system (SIMATIC 300):
1. Add the master PLC manually to the configuration.
( ^ 77)
2. Select the communication channel and enter the address of the master PLC.
3. Enter the CPU slot number and the mounting rack number of the sub-system.
4. Select the sub-network type (here: MPI).
5. Enter the sub-network ID (see tip on the next page).
6. Enter the address of the sub-system (MPI, TCP or H1 address).
Now you can access the sub-system. Using the scan function you can find out under which addresses
controllers have been configured in the PLC program of the sub-system.
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