Siemens SINUMERIK 840D Description Of Functions page 197

11.03
3.12 SI I/Os using fail-safe modules connected to PROFIBUS DP (840D from SW 6.3.30)
Inputs/outputs (F useful data) of an F module are automatically connected to
PLC-SPL SGE/SGA
the SPL interface in data block DB18 by the PLC basic program.
It is not possible to connect them in a PLC user program.
Axial 611D SGE/SGA The I/Os (F useful data) of an F module cannot be connected to axial 611D
SGE/ SGAs. They can only be connected in the context of the NCK-SPL which
must be installed for the purpose.
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SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
3 Safety-Related Functions
3-197