When SM560-S / SM560-S-FD-1 / SM560-S-FD-4 safety CPU is restarted by a power cycle, the previously saved error information is lost. Additional measures in the safety application program, like saving of the error or other information to the safety CPU flash memory, shall be programmed on the safety CPU to persistently save information on it. The safety I/O modules receive their parameter sets each time during system start-up. The safety CPU is able to reintegrate safety I/O modules using PROFIsafe start-up behavior⮫ [2]. If your process does not allow an automatic start-up after power cycle, you must program a restart protection in the safety program. The safety process data outputs must be blocked until manually acknowledged. These safety outputs must not be enabled until it is safe to do so and faults were corrected.