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2 PROFINET IO in SIPROTEC
2.5 Assignment of IO Modules to SIPROTEC Data Objects
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SIPROTEC 4, Communication Module PROFINET IO, Communication Profile
C53000-L1840-C360-1, Edition 08.2012
Mapping SIPROTEC Data Objects to PROFINET IO
The mapping describes all SIPROTEC data objects which are sent or received via communication, and defines
their position or identification in PROFINET IO. This can include all available data objects or only subsets
thereof.
The following 2 main elements exist:
•
Assignment table in the device parameter set
•
PROFINET IO mapping file
After device startup with a valid device configuration, the 2 main elements mentioned previously are available
in the EN100 module and can be analyzed using the PROFINET IO firmware.
Although the data volumes for each data type are defined in the mapping (for example: 20 indications,
10 measured values, etc.), the assignment to SIPROTEC data objects of the same type can be modified when
parameterizing the devices using DIGSI.
Each PROFINET IO data object is assigned a PROFINET IO mapping data-object number, starting at 1 for
each data type (for example, MV#1, see Figure 2-17).
IO Modules for PROFINET IO Parameterization
The maximum data volume per data type for the data exchange is described in the respective bus mapping
manual. The preset data-object assignments or the assignments entered during parameterization in DIGSI
define the data at the individual mapping positions.
Only such data is transmitted via PROFINET IO which is represented by the respective IO modules.
The assignment of IO module data contents to the PROFINET IO mapping data-object numbers always starts
at the smallest PROFINET IO mapping data-object number, see Figure 2-17.
The IO modules of one type do not have to follow directly one after another in the IO controller parameterization
software.
The option of assigning data in DIGSI allows the data to be configured as desired so that, for example, fewer
IO modules are required.
If too many IO modules of the same type have been added during parameterization, causing the maximum
number of PROFINET IO objects for this data type to be exceeded, the IO device will recognize this during
startup of the PROFINET IO communication. An error indication will be sent to the IO controller.
IO modules which cannot be assigned to any PROFINET IO objects are left unconsidered during the further
data exchange.
com_profinet-io_profile_us.book Page 39 Friday, August 17, 2012 1:40 PM