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Another advantage of a joint
communication profile is that the
same software can be used for the
automation systems, PCs, and
operator control and monitoring
software (e.g. WinCC).
The profile is based on the PROFIBUS
profile for low voltage switchgear
(LVSG) of the PROFIBUS user
organization (order no. 3.122).
Communication with a
PROFIBUS-DP Class 1 Master
A class 1 master is the "configuration
master," which, during start-up,
determines the mode that the slave
is to use for communication. In most
cases, a class 1 master is a PLC, such
as a SIMATIC S7 with a PROFIBUS-DP
interface.
It is possible to integrate an additional
communication system at any point in
time, with DPV1 and read or write
data records acyclically.
Communication with a
PROFIBUS-DP Class 2 Master
PCs with PROFIBUS-DP cards are
usually class 2 masters.
Communication with a class 2
master always takes place via DPV1.
Integration with the GSD file
You can download a constantly
updated version of the GSD file
for WL circuit breakers from the
Siemens A&D Service and Support
Homepage.
www4.ad.siemens.de
WL PROFIBUS Communication and Electronic Accessories • July 2004
Click "Search" in the blue header, type
"sentron gsd" and click "go."
The device parameters are configured
using a configuration tool, which is
available with every PROFIBUS-DP
master. If you are using a SIMATIC S7
as the master, this is the HWConfig
tool provided with the SIMATIC STEP7
package. If you are not using a
SIMATIC S7, configuration can be
carried out, for example, with COM
PROFIBUS, depending on the master.
Installing the GSD file
If you have not yet installed the GSD
file, which contains the master data
for the circuit breaker, you have to
integrate it in the configuration tool
beforehand.
The "HWConfig" hardware
configuration editor can be used
to integrate the GSD file in the
SIMATIC development environment.
To do so, open the "Hardware"
object in the SIMATIC Manager and
select "Install new GSD..." from
"Extras." You then have to select
the source (e.g. disk) and the
'Siem80C0.gs*' file. The placeholder
('*') stands for the relevant
language index (g = German, e =
English). Once you have completed
this step, the WL breaker is available
for further configuration in the
hardware catalog under "PROFIBUS-
DP\Other field devices\Switchgear."
Note: The GSD file can be used for
both the DP standard and extended
data exchange with DPV1. You
cannot set device-specific parameters
using the PROFIBUS-DP during
start-up.
PROFIBUS Communication
WL Circuit Breaker
The parameter settings can also be
controlled using the S7 program.
A range of system functions are
available here to transmit data
records to the slave via the DPV1
channel.
Creating a master system
To create a DP master system using
the HWConfig editor:
• Assign a master address between
1-125 (e.g. 11)
• Select the required transmission
rate (e.g. 1.5 Mbit/s)
• Select the PROFIBUS-DP profile
Note: Depending on the PROFIBUS-
DP configuration, you may need to
make further settings in the master
system.
Inserting and addressing the slave
First, select "SENTRON WL/VL" in
the "Hardware Catalog" and drag
it to the master system.
Note: When the 'SENTRON WL/LV'
slave is selected, only a machine-
readable product designation
number (e.g. 3WL9111-0AT15-
0AA0) is displayed for information
purposes. This does not affect the
system function.
You then have to select a basic type,
which you can confirm with OK.
To run the slave on the PROFIBUS-DP,
you still have to assign and set a
unique address on this PROFIBUS-DP
line.
If the properties are to be changed,
select the slave and choose
"Properties-DP slave."
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