Siemens 6ES7517-3HP00-0AB0 Central Processing Unit
01Technical Summary
Siemens 6ES7517-3HP00-0AB0 is the SIMATIC S7-1500H CPU 1517H-3 PN for high-availability controller configurations. It integrates 2 MB program work memory and 8 MB data work memory, a PROFINET RT interface with a two-port switch, a second PROFINET interface and two H-SYNC interfaces. The module is engineered as part of an S7-1500H system, so the partner CPU, synchronization links, network topology, Memory Cards, firmware and redundancy project must be treated as one controlled configuration.
02Specifications
| Manufacturer | Siemens |
|---|---|
| Article Number | 6ES7517-3HP00-0AB0 |
| Product Designation | CPU 1517H-3 PN |
| Automation Platform | SIMATIC S7-1500H |
| Program Work Memory | 2 MB |
| Data Work Memory | 8 MB |
| Load Memory | SIMATIC Memory Card, maximum 32 GB |
| Bit Processing Time, Typical | 4 ns |
| Interface 1 | PROFINET RT with integrated 2-port switch |
| Interface 2 | PROFINET |
| Synchronization Interfaces | Two H-SYNC interfaces |
| Isochronous Mode / IRT | Not supported |
| Rated Supply | 24 V DC; permissible range 19.2 to 28.8 V DC |
| Firmware / Engineering | V3.1; TIA Portal V19 for FW V3.1 |
| Operating Temperature | 0 to 60 °C horizontal; 0 to 40 °C vertical |
03Features
Key Functions
- Designed for SIMATIC S7-1500H high-availability controller configurations.
- Provides 2 MB program work memory and 8 MB data work memory.
- Uses two dedicated H-SYNC interfaces for synchronization within the redundant architecture.
- Provides a PROFINET RT two-port interface and a second PROFINET interface.
- Supports system diagnostics, I&M data, web-server access and maintenance-free memory backup.
- Requires a SIMATIC Memory Card and coordinated engineering of both controller sides.
Identification
- Manufacturer: Siemens
- Model: 6ES7517-3HP00-0AB0
- Product Type: SIMATIC S7-1500H CPU 1517H-3 PN central processing unit
04Compatibility
- Use within a verified S7-1500H configuration and match the partner CPU article, firmware and hardware status.
- Confirm both H-SYNC links, interface modules, synchronization cabling and redundant-controller topology.
- Match PROFINET device names, IP settings, network segmentation, system IP addressing and all configured IO devices.
- Use compatible SIMATIC Memory Cards and keep the project, firmware and protection settings aligned across the system.
- Do not assume PROFINET IRT or isochronous operation; Siemens lists both as unsupported for this CPU.
- Plan maintenance to preserve process availability and follow the documented redundancy-state and switchover procedure.
05Replacement
- Siemens records a product phase-out milestone dated 1 October 2025 for this article.
- Any replacement must be assessed for the complete S7-1500H pair, synchronization design, firmware and network configuration.
- Back up the redundancy project and document both CPU states, Memory Cards, H-SYNC connections and system addressing.
- After exchange, verify synchronization, redundancy status, controlled switchover, communications, diagnostics and all process functions.
06FAQ
What is Siemens 6ES7517-3HP00-0AB0?
It is the SIMATIC S7-1500H CPU 1517H-3 PN for high-availability controller configurations.
How much work memory is integrated?
It provides 2 MB for the program and 8 MB for data.
Which synchronization interfaces are included?
The CPU includes two H-SYNC interfaces for the redundant controller architecture.
Does this CPU support PROFINET IRT?
No. Siemens lists IRT and isochronous mode as unsupported for this CPU.
Can it be replaced as a single independent PLC?
Replacement must be planned as part of the complete S7-1500H pair and synchronization configuration.
What must be tested after exchange?
Test controller synchronization, redundancy state, switchover, PROFINET communication, diagnostics and the complete process sequence.
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