Various failsafe CPUs with graduated levels of performance are available for the SIMATIC S7-1500:
| Features | CPU 1516F-3 PN / DP | |
|---|---|---|
| Work memory for program, integrated | 1.5 MB | |
| Work memory for data, integrated | 5 MB | |
| Load memory | Plug-in via SIMATIC memory card | |
| Command execution times | ||
| Bit operation | 0.01 µs | |
| Word operation | 0.012 µs | |
| Fixed-point operation | 0.016 µs | |
| Floating-point operation | 0.064 µs | |
| Integral interfaces | ||
| PROFINET IO IRT |
(2-port switch) |
|
| PROFINET | 1 x PN | |
| PROFIBUS DP | 1 x DP | |
| Standards, approvals, certificates |
SIL according to IEC 61508: to SIL3 in each case PL according to ISO 13849: to PLe in each case | |