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5.2.1.10 Write protection
.
5.3
Cyclic data transmission
5.3.1 Configuration
5.3.1.1
Configuring the user data
.
SIPART PS2 PA Manual
A5E00127926--05
After completing the commissioning, the write protect can be set to
prevent an acyclic master from making unwanted changes. Locally the
positioner parameters can however be changed just as they could
previously.
To do this, enter the information "On" in the write protect submenu for
the positioner. If anyone then attempts to write, the PDM will display
the report "Communication aborted".
NOTE
If "ON" has already been set using this "Hardware Write Protect"
screen, the binary input 1 in the positioner will already be
parameterized to "bLoc1" or "bLoc2" and active. This means that
writing using PDM is inhibited.
Using cyclic data transmission, the user data relevant for process
automation is transferred between the class 1 Master (control or
automation system) and the positioner.
Information on the input and output range, as well as the consistency of
the cyclically transmitted data is defined in the DeviceMasterData file
(GSD file), tested with the device's configuration message and, if
appropriate, declared to be valid. During the design, the user data
which will be transmitted in cyclic operation is set. This means that it is
possible to optimise the quantity of data to be transmitted. The GSD
files for all common devices are already stored in the Siemens control
system, however they are also accessible over the Internet and can be
subsequently imported.
The files are available on the Internet at:
www.siemens.com/sipartps2
Click on "More Info" and "--> Instructions and Manuals".
The user data which is made available to the control system or the
open--loop control via the PROFIBUS depends on the desired
configuration selected.
NOTE
For STEP 7, the configuring tool is HW--Konfig. For STEP 5, it is
COM_PROFIBUS.
Functions/operation via PROFIBUS PA
139
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