The SIEMENS SIMATIC S7-300 CPU 317F-2DP (MLFB: 6ES7317-6FF03-0AB0) is a powerful fail-safe CPU designed for complex automation environments where safety and reliability are paramount. With its dual PROFIBUS DP interfaces, 1 MB of integrated working memory, and support for safety functions up to SIL 3, this controller is the backbone of distributed control systems in industries such as chemical processing, electronics manufacturing, and electrical power management. The CPU 317F-2DP combines high-speed processing for standard logic with certified safety functionality, ensuring both productivity and personnel protection. Below is the detailed technical specification table.
| Parameter |
Specification |
| Product Type |
SIMATIC S7-300 CPU 317F-2DP |
| Order Number (MLFB) |
6ES7317-6FF03-0AB0 |
| Working Memory |
1024 KB (1 MB) |
| Load Memory |
Requires Micro Memory Card (MMC) – capacity dependent on MMC used |
| Retentive Memory |
Yes – supports retentive data blocks for power-loss preservation |
| 1st Interface |
MPI/DP – 12 Mbit/s max (MPI and PROFIBUS DP) |
| 2nd Interface |
DP master/slave – PROFIBUS DP (12 Mbit/s max) |
| Power Supply |
24 V DC (20.4 V to 28.8 V recommended) |
| Power Protection |
External protection recommended for supply cables |
| Safety Rating |
SIL 2 / SIL 3 (depending on configuration and software) |
| Programming Software |
STEP 7 V5.5 + SP1 or higher; S7 Distributed Safety V5.2 SP1 or higher |
| Max. Number of Data Blocks (DBs) |
Limited by MMC capacity and system resources |
| Max. Number of Function Blocks (FBs) |
Limited by MMC capacity and system resources (max. 32 KB per block) |
| Max. Number of Functions (FCs) |
Limited by MMC capacity and system resources (max. 32 KB per block) |
| Organization Blocks (OBs) |
Includes OB1 (cyclic), OB35 (safety monitoring), and others per application |
| S7 Counters |
Unlimited (limited by RAM); retentive |
| S7 Timers |
Unlimited (limited by RAM); retentive |
| Bit Operation Time |
0.05 µs (typical) |
| Word Operation Time |
0.09 µs (typical) |
| Fixed-Point Arithmetic Time |
0.12 µs (typical) |
| Floating-Point Arithmetic Time |
0.45 µs (typical) |
| Dimensions (W x H x D) |
40 mm x 125 mm x 130 mm |
| Weight |
Approx. 290 g |
| Ambient Temperature (Operation) |
0 °C to 60 °C |
| Ambient Temperature (Storage) |
-40 °C to 70 °C |
| Relative Humidity (Operation) |
10% to 95% (non-condensing) |
| Protection Class |
IP20 |
| Product Lifecycle |
Active – Siemens standard support and spare parts available |
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