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FAQs

Q1: What is the primary function of the 6ES7318-3FL01-0AB0?
It is the most powerful fail-safe CPU in the SIMATIC S7-300 family, designed for both standard control and safety-related control (emergency stop, safety door monitoring, etc.) in a single device. It is certified up to SIL 3 / PL e, making it suitable for demanding safety applications in manufacturing and process industries.
Q2: Does this CPU require an MMC card to operate?
Yes. The CPU 319F-3 PN/DP requires a SIMATIC Micro Memory Card (MMC) for operation. The MMC serves as the load memory and is essential for program storage and data retention. Maximum supported capacity is 8 MB.
Q3: What is the difference between CPU 319F-3 and CPU 317F-2?
The CPU 319F-3 (this model) has 2 MB work memory and PROFINET interface (2-port switch). The CPU 317F-2 has 1.5 MB work memory and also includes PROFINET. The 319F-3 is the highest-performance fail-safe CPU in the S7-300 family, with faster processing times (0.01 µs bit operations vs. 0.06 µs for 317F).
Q4: What software is required to program this fail-safe CPU?
The CPU requires STEP 7 V5.5 combined with the Distributed Safety V5.4 option package. The safety program is compiled separately and generates the F-shared DB required for PROFIsafe communication. It is not configurable in TIA Portal.
Q5: Can this CPU be used in redundant (H) systems?
No. The 6ES7318-3FL01-0AB0 is a standalone fail-safe CPU, not a redundant CPU. For redundant high-availability fail-safe applications, the S7-400FH system with CPU 417-5H (e.g., 6ES7417-5HT06-0AB0) is required. The 319F-3 can be used as a fail-safe CPU in non-redundant configurations.