SIEMENS 6ES7317-7TK10-0AB0

What is 6ES7317-7TK10-0AB0 and where is it used?

The 6ES7317-7TK10-0AB0 is a SIMATIC S7-300 Technology CPU 317T-3 PN/DP from Siemens. It is designed for both traditional PLC tasks and technology-oriented motion control applications. These include machines with positioning, synchronised motion, electronic cam, or drive control functions. The assembly combines 1,024 KB of work memory, an MPI/DP interface, a DP(DRIVE) interface, and PROFINET with an integrated 2-port switch. In addition, it features integrated technology I/O with 4 digital inputs and 8 digital outputs. This makes the CPU particularly suitable for packaging machinery, handling systems, conveyor technology, and axis control applications, where standard control and advanced technology functions are to be combined within a single compact central processing assembly.

Overview of the key technical data and what they mean

For maintenance and procurement purposes, the following specifications are particularly important. The CPU operates on 24 V DC within a permissible voltage range of 19.2 to 28.8 V DC, requires a typical current consumption of 1,050 mA, and has a typical power dissipation of 7.5 W. The 1,024 KB work memory is designed for demanding user programs and technology objects. The load memory is stored on a removable SIMATIC Micro Memory Card (MMC), with a minimum capacity of 8 MB required. With 8 KB of input address space, 8 KB of output address space, isochronous operation via PROFIBUS DP or PROFINET, and integrated digital technology I/O, the CPU is optimised for fast and time-critical machine functions. For purchasing departments, it is important to note that the article number refers to a complete central processing assembly, not merely a communication or expansion module.

Product status, life cycle status and obsolescence

Siemens officially lists the 6ES7317-7TK10-0AB0 as a spare part. Within the Siemens SIMATIC S7-300 and ET 200M product families, the lifecycle milestone PM400 has already been reached, while PM410 (Product Cancellation) became effective on 01 October 2025. For operators, this means that the assembly remains technically relevant, but procurement risks relating to availability, price volatility, and spare parts supply are increasing. No direct 1:1 plug-compatible successor for this exact order number could be clearly identified in the available sources. However, Siemens describes the 31xT-3 PN/DP series as a spare-part-compatible successor to the older 31xT-2 DP generation. For modernisation projects rather than direct replacement, Siemens provides migration paths towards the S7-1500 and S7-1500T platforms.

Available EICHLER services and why they are relevant

For operators of ageing S7-300 technology systems, the most relevant options are repair, exchange, used-unit procurement, and new-unit procurement. In the EICHLER shop, a repair service is offered for this assembly with a typical turnaround time of 2 to 5 days. The service includes technical cleaning, preventive maintenance, comprehensive functional testing, and a minimum 24-month warranty. In addition, exchange solutions on request, used assemblies, and new assemblies are available. For maintenance personnel, this is important because unexpected downtime can often be bridged more quickly through repair or exchange than by relying solely on the procurement of new parts. For purchasing departments, these options provide greater flexibility in terms of price, delivery time, and the remaining service life of the installation. For decision-makers, the key benefit is that operational reliability can still be maintained during the obsolescence phase through well-planned repair and exchange strategies.

Which software is required for the 6ES7317-7TK10-0AB0?

For engineering the CPU 317T-3 PN/DP, you require at least STEP 7 V5.5 SP2 together with the S7-Technology V4.2 SP3 option package. For newer firmware versions, Siemens specifies STEP 7 V5.6 in combination with S7-Technology V4.2 SP5. This is important for purchasing and maintenance departments because procuring a CPU without a compatible engineering environment can lead to commissioning delays later on. Before ordering or replacing the CPU, it is therefore advisable to verify which STEP 7 and S7-Technology versions are actually available within your organisation.

Which memory card is required for the CPU 317T-3 PN/DP?

The assembly requires a SIMATIC Micro Memory Card (MMC), and Siemens specifies a minimum capacity of 8 MB. Without a suitable MMC, program loading, data backup, and reliable system operation cannot be properly ensured. In older S7-300 technology systems, the memory card is often an underestimated bottleneck because used CPUs are not always supplied with a suitable MMC. For service purposes, it is therefore recommended to treat the CPU and MMC as a functional pair and to keep at least one tested spare memory card in stock.

Is the 6ES7317-7TK10-0AB0 still a standard product or only a spare part?

Siemens classifies the 6ES7317-7TK10-0AB0 as a spare part. At the same time, the S7-300/ET 200M product family has already reached an advanced stage of its lifecycle: the product phase-out has been announced, and PM410 (Product Cancellation) became effective on 01 October 2025. In practical procurement terms, this means that new units may still be available, but long-term availability will increasingly depend on existing stock, specialised service providers, and verified used or exchange units.

Can I replace an older CPU 317T-2 DP with the 317T-3 PN/DP?

Siemens explicitly states in its documentation that the 31xT-3 PN/DP generation is a spare-part-compatible successor to the older 31xT-2 DP generation. This makes the 317T-3 PN/DP an obvious option when an older technology CPU needs to be replaced. Nevertheless, such a replacement is not purely a hardware issue. Before carrying out the exchange, the project configuration, firmware version, fieldbus structure, technology objects, and the available engineering software version should all be checked to ensure that the electrical replacement also results in a fully functional replacement.

Does the CPU support PROFINET diagnostics and device replacement without a removable storage medium?

Yes. Siemens specifies these PROFINET functions for the CPU 317T-3 PN/DP from firmware version V3.2 onwards. These include enhanced PROFINET diagnostic functions and support for device replacement without a removable storage medium. This is particularly useful for maintenance personnel because field devices can be replaced more quickly during service operations when the network topology, device names, and project configuration have been prepared correctly. For a smooth device replacement process, however, the firmware version, network configuration, and the actual network topology must all match.

What is the difference between the CPU 317T-3 PN/DP and the CPU 317TF-3 PN/DP?

The CPU 317TF-3 PN/DP is the variant with integrated safety functionality. Siemens explicitly describes it as a version with additional safety functions and a larger amount of work memory compared to the CPU 317T-3 PN/DP. The 317T-3 is the correct choice for standard technology and motion-control applications that do not require fail-safe functionality. The 317TF-3 becomes relevant when personnel protection or machine safety functions must also be implemented within the same controller. For purchasing departments, this distinction is important because the article number, software requirements, and application area are not interchangeable.