Siemens SINUMERIK MC Commissioning Manual page 54

Safety program of the F-PLC
3.1 Overview
Safety program
For a SINUMERIK MC, the F-capability of the PLC is permanently activated, and as a
consequence, an F-runtime group created. The F-runtime group, together with the associated
F-blocks, is known as the safety program.
You generate a safety program in the program editor. You program failsafe FBs and FCs in the
FBD and LAD programming languages with operations from the option package - creating
failsafe DBs.
Safety checks are automatically performed when compiling the safety program, and additional
failsafe blocks are integrated for fault detection and fault response. This ensures that failures
and faults are detected, and the appropriate responses triggered to keep the safety system in
a safe state - or to transition it into a safe state.
In addition to the safety program, a standard user program can also be executed in the F-PLC.
Standard and safety programs can coexist in an F-PLC. This is because the safety-relevant
data of the safety program are protected against being inadvertently influenced by data of the
standard user program.
Data can be exchanged between the safety and standard user program in the F-PLC using bit
memories, data of a standard DB - and by accessing the process image of inputs and outputs.
Further information
Programming Guidelines Safety for SIMATIC S7-1200/1500
support.industry.siemens.com/cs/document/81318674/programming-guidelines-and-
programming-styleguide-for-simatic-s7-1200-and-s7-1500?dti=0&lc=en-WW)
54
(https://
Safety Integrated (with SINAMICS S120)
Commissioning Manual, 02/2020, A5E46305916B AB