2.6 Safety-relevant processing using MC components
Safety-relevant internal and external signals are processed in the safety-relevant user program
(safety program) of the F-PLC:
● F-I/O is connected to the F-PLC, and directly controlled via PROFIsafe.
The safety functions are mainly embedded in the safety program (F-PLC) - and in the fail-
safe inputs and outputs (F-I/O).
● Safety functions integrated in the drive are also controlled via PROFIsafe:
PROFIsafe telegrams (for example, SIEMENS telegram 901) are transferred via a
PROFINET interface from the PLC to the SINAMICS S drive for this purpose.
Status and control information is transferred between the integrated subcomponents of the
SINUMERIK MC (PLC, NC) using SIC/SCC (Safety Info Channel/Safety Control Channel).
PROFIsafe communication is only possible between F-components. As a consequence, for
SINUMERIK MC, PROFIsafe communication is established between the following
components:
● F-PLC as PROFIsafe host
● F-I/O as PROFIsafe slave/device
Fundamentals
2.6 Safety-relevant processing using MC components
Safety Integrated (with SINAMICS S120)
28 Commissioning Manual, 02/2020, A5E46305916B AB
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