Care and Maintenance
127
SIP ART PS2 PA Manual
A5E00127926-03
5.3 Cyclic data transmission
Using cyclic data transmission, the user data relevant for process au-
tomation is transferred between the class 1 Master (control or automa-
tion system) and the positioner.
5.3.1 Configuration
Information on the input and output range, as well as the consistency of
the cyclically transmitted data is defined in the DeviceMasterData file
(DMD file), tested with the device’s configuration message and, if ap-
propriate, declared to be valid. During the design, the user data which
will be transmitted in cyclic operation is set. This means that it is pos-
sible to optimise the quantity of data to be transmitted. The DMD files
for all common devices are already stored in the Siemens control sys-
tem, however they are also accessible over the Internet
(www.ad.siemens.de/csi_e/gsd) and can be subsequently imported.
5.3.1.1 Configuring the user data
The user data which is made available to the control system or the
open-loop control via the PROFIBUS depends on the desired configu-
ration selected.
.
NOTE
For STEP 7, the configuring tool is HW-Konfig. For STEP 5, it is
COM_PROFIBUS.
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