EUCHNER EKS FSA with Profibus-DP Interface - Manual (Page 27)

Manual EKS Electronic-Key Adapter Profibus-DP
Read-only operation in conjunction with Electronic-Key read-only* (cyclic)
Five bytes of Electronic-Key content are read cyclically.
Data field size
I/O area of bus master Key content
inputs / outputs
7 bytes 5 bytes
*
The read-only transponder type can also be read using the Electronic-Key adapter with Profibus DP interface. However,
we do not recommend using this transponder type in new installations. The read-only transponder type cannot be used
in conjunction with the version EKS FSA.
The required module is selected from these pre-defined modules in the GSD file using a configuration software
tool.
Figure 8: Module selection, example based on SIMATIC S7 hardware configuration
Select a software module in the GSD file, e. g. Read/Write: 32 Byte I/O. The number of bytes defined here is
transferred cyclically to the input area of the bus master. The number of bytes of user data that is transferred to
the Electronic-Key is given by the data field size defined here minus 4 bytes. So on the selection of
Read/Write: 32 Byte I/O, 28 bytes user data are transferred from the Electronic-Key.
Information!
It is only possible to select the Read-Only: 7 Byte I module in conjunction with the read-only
transponder type (see above).
8.2 Parameterization message
After being switched on, the Electronic-Key adapter expects a parameterization message from the bus master;
this message contains the values for the parameters that can be set (global operating parameters) for the
Electronic-Key adapter. The operating mode of the Electronic-Key adapter is defined based on this information.
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