Lenze Drive Server Bus server S7 getting started - Manual (Page 10)

Busserver S7
L
71 Busserver S7 DE/EN 1.0
2.3 Supported PLC hardware
The following PLC hardware is supported: Siemens S7-300 and S7-400
• For S7-400, the controllers must be connected to the PROFIBUS of the CPU.
• For S7-300, the controllers can also be connected to PROFIBUS CP.
• If an Ethernet connection is to be established between PC and PLC, the PLC must be equipped
with an Ethernet CP (e. g. CP343-1, CP443-1).
• If a PROFIBUS connection is to be established between PC and PLC, the PLC must be equipped
with a PROFIBUS CP (e. g. CP343-5, CP443-5).
Required PLC data blocks/ RAM requirements
Two data blocks are required for data exchange with the drives. In addition, one function block instance
is to be activated for each drive to be addressed. This means that one data block per drive (instance
DB) is required for data management.
The RAM requirements of the PLC can be obtained from the following table:
Function block type RAM requirements Number of function blocks
required
Data exchange DB 508 bytes 2
Instance DB 150 bytes Number of drives
Note!
The number of PLCs which can be simultaneously addressed depends on the interface module of the
PC or PLC.
• The Siemens PC adapter supports only 4 communication links. Therefore, only 4 PLCs can be
addressed simultaneously.
For more information, please read the documentation on the interface module provided by the
manufacturer.
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