PROFIBUS or PROFINET is the common communication platform of SIMATIC PCS 7 and SIMATIC Safety Integrated. Standard PROFIBUS in combination with the PROFIsafe profile is used for safety-related communication between the CPU of the automation system and safety-related process I/O.
PROFIsafe expands the telegrams by the addition of information with which the PROFIsafe communication partners can detect and compensate transmission errors such as delays, incorrect sequences, repetitions, losses, faulty addressing or data falsification.
PROFIsafe is an IEC 61508 certified profile for PROFIBUS DP/PA and PROFINET. With SIL 3 (Safety Integrity Level) and Category 4 according to EN 954-1, PROFIsafe meets the highest safety requirements for process and manufacturing industries. It enables both standard and safety-related communication on a single cable.