Siemens 6ES7417-4HT14-0AB0 SIMATIC S7-400H CPU 417H
01Product Identification
Siemens 6ES7417-4HT14-0AB0 is a CPU 417H central processing unit for SIMATIC S7-400H, S7-400F, and S7-400FH architectures. It provides 30 MB of work memory divided equally between program and data, one MPI/DP interface, one additional PROFIBUS DP interface, and two interfaces for synchronization modules used by the high-availability design.
02Engineering Data
| Manufacturer | Siemens |
|---|---|
| Article Number | 6ES7417-4HT14-0AB0 |
| Product Family | SIMATIC S7-400H / F / FH |
| CPU Type | CPU 417H |
| Work Memory | 30 MB total |
| Program Memory | 15 MB |
| Data Memory | 15 MB |
| Interfaces | 1 MPI/DP, 1 PROFIBUS DP, 2 synchronization-module interfaces |
| Redundancy Function | S7-400H high-availability CPU pairing |
| Lifecycle | Discontinued; end of product lifecycle / repair-part status |
| Official Support Reference | SIOS support ID 59903098 |
03Functions
Operating Functions
- Designed for the paired CPU architecture of SIMATIC S7-400H systems.
- Separate synchronization interfaces connect the redundancy synchronization modules.
- The 30 MB work memory is divided into equal program and data areas.
- MPI/DP and PROFIBUS DP interfaces support the documented SIMATIC communication architecture.
- The CPU is also identified for S7-400F and S7-400FH applications subject to the approved safety configuration.
- Rack diagnostics and high-availability state must be handled as part of the complete redundant system.
Product Identity
Manufacturer: Siemens
Model: 6ES7417-4HT14-0AB0
Product Type: SIMATIC S7-400H CPU 417H
04System Integration
- Match the exact CPU article, firmware, memory configuration, rack, power supply, synchronization modules, and partner CPU.
- Confirm STEP 7 hardware support and the approved H-system project before installation.
- Do not form a mixed redundant pair unless Siemens documentation explicitly supports the hardware and firmware combination.
- Verify both synchronization links and the complete redundant communication path.
- For F or FH service, preserve the approved safety program, signatures, passwords, and validation records.
05Applications
- High-availability SIMATIC S7-400H automation systems.
- S7-400FH safety-related process control where the exact CPU is approved.
- Large legacy process installations using paired CPU 417H controllers.
- Repair-part replacement for an installed 6ES7417-4HT14-0AB0 CPU.
06Lifecycle
- Siemens identifies the product as discontinued and directs lifecycle questions to support ID 59903098.
- Back up the complete project and record the partner CPU, firmware, synchronization hardware, communications, and redundancy status.
- Follow the S7-400H procedure for stopping, replacing, synchronizing, and returning a CPU to redundant operation.
- After installation, verify diagnostics, partner communication, synchronization, operating mode, and controlled failover.
- Any migration to a newer high-availability controller must be engineered at system level, including I/O, networks, safety, software, and validation.
FAQFrequently Asked Questions
How much work memory does this CPU provide?
It provides 30 MB total, divided into 15 MB for program and 15 MB for data.
Which system family uses this CPU?
It is used in SIMATIC S7-400H and, with the approved configuration, S7-400F and S7-400FH systems.
How many interfaces are identified?
Siemens identifies four: one MPI/DP, one PROFIBUS DP, and two synchronization-module interfaces.
Is the product still active?
No. Siemens identifies it as discontinued and at the end of the product lifecycle.
Can one CPU be replaced without checking the partner?
No. The partner CPU, firmware, synchronization modules, rack configuration, and project must all be verified.
What should be tested after replacement?
Verify synchronization, redundant operation, diagnostics, communications, program state, failover behavior, and any safety validation requirements.
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