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FAQs

Q1: What is the primary function of the 6ES7416-3FS07-0AB0?
It is a fail-safe CPU for the SIMATIC S7-400F/FH system. It executes both standard control and safety-related control (emergency stop, safety door monitoring, etc.) in a single CPU, certified up to SIL 3 / PL e. It is designed for applications where standard automation and safety functions must be integrated .
Q2: What is the difference between 6ES7416-3FS07-0AB0 and 6ES7416-3ES07-0AB0?
The FS07 is the fail-safe (F) version, while the ES07 is the standard (non-F) version. Both share the same 16 MB work memory, MPI/DP and PROFINET interfaces, and processing speed. The FS07 adds safety-related program execution and PROFIsafe communication capability, making it suitable for SIL 3 applications .
Q3: What software is required to program this fail-safe CPU?
The CPU requires STEP 7 V5.5 with HSP 262 or higher , combined with the Distributed Safety option package for programming the F-program. The safety program is compiled separately and generates the F-shared DB required for PROFIsafe communication. It is not directly configurable in TIA Portal.
Q4: Can this CPU be used in redundant (H) systems?
No. The 6ES7416-3FS07-0AB0 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 416F-3 can be used as a fail-safe CPU in non-redundant or S7-400F configurations.
Q5: What are the common causes of "EXTF" (External Fault) LED errors?
Common causes include:
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Discrepancy between configured and physical module versions: For example, a PN/PN coupler configured as V2.0 but physically connected as V3.0
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Safety task timeout: If the safety program execution time exceeds the configured F-monitoring time, the CPU goes to STOP with a safety task timeout error
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Internal safety program errors: Event ID 16#75D1 indicates an internal CPU error related to the safety program, often resolved by recompiling the safety program