Profibus Communication - Siemens SINUMERIK 840DiE sl Manual

01/2007
6.3 Creating a SIMATIC S7 project
MPI
PROFIBUS DP
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
This section describes the creation of an S7 project for basic commissioning of
the PLC, the MPI and PROFIBUS communications, and the input/output data
areas of the NC. To do this you will have to perform the following operations:
– Create a project
– Set up a station
– Parameterize MPI communications (optional)
– Parameterize PROFIBUS communications
– Parameterize the input/output data areas of the NC
Note
S
The X102 interface: MPI/DP can either be used as an MPI or PROFIBUS
interface.
S
The MPI communication only has to be parameterized when the PLC is in
the original state (state of the PLC after general reset) and no PLC archive
is present that can be loaded via HMI Advanced.
For the parameterization of the MPI communication, the MPI addresses of the
PLC and NC and the transmission rate must be set on the MPI bus (see Section
6.3.4, Page 6-142).
Maximum two PROFIBUS lines can be connected to a SINUMERIK 840Di sl:
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Interface X101: PROFIBUS DP
In the case of the SINUMERIK 840Di sl, the position controller cycle of the
NC is derived directly from the isochronous PROFIBUS cycle. Defined val-
ues must therefore always be entered for the following PROFIBUS parame-
ters:
– Mode: DP master
– Isochronous PROFIBUS: Active
– Isochronous time T
Both the PLC and the NC have direct access to this PROFIBUS interface.
PROFIBUS drives and NC–specific I/Os can only be connected via this in-
terface.
S
Interface X102: MPI/DP
This PROFIBUS interface is only available to the PLC. Alternatively it can be
operated in the mode: "DP master" or "DP slave".
A full description of how to parameterize PROFIBUS communications is given in
Section 8, Page 8-175.
Note
The instructions given in this section are essentially limited to the special
characteristics of the SINUMERIK 840Di sl. For more details about working with
SIMATIC STEP 7 please refer to the relevant SIMATIC documentation or
Online Help.
6.3 Creating a SIMATIC S7 project
on PROFIBUS DP: Position control cycle
DP
6 PLC Commissioning
6-139