SIEMENS 6ES7315-7TJ10-0AB0

What is the 6ES7315-7TJ10-0AB0 and where is it used?

The 6ES7315-7TJ10-0AB0 is a SIMATIC S7-300 CPU 315T-3 PN/DP from Siemens designed for both standard PLC tasks and integrated technology or motion-control applications. The module combines conventional control functions with features for drive technology, synchronous processing and high-speed switching signals. Typical applications include machines and systems with positioning tasks, cam controls, cam switching functions, reference point detection and synchronised motion sequences. For maintenance engineers, the CPU is particularly relevant when existing S7-300T applications must continue operating reliably. For purchasing departments, it is important whenever an identical order number is required for spare-part procurement, repair or exchange in order to minimise downtime without extensive re-engineering projects.

Overview of the most important technical data and what it means

The CPU operates on 24 V DC within a permissible range of 19.2 to 28.8 V. It provides 384 KB of work memory, an MPI/DP interface with up to 12 Mbit/s, a dedicated DP(DRIVE) interface for drive systems and a PROFINET interface with an integrated 2-port switch. For technology applications, it includes 4 integrated digital inputs and 8 integrated digital outputs. This is particularly important when processing reference cams, high-speed cam signals or drive-related signals with short response times. The CPU supports up to 8 axes and a total of 32 technology objects. For engineering and service purposes, STEP 7 V5.5 SP2 or later and the S7-Technology option package V4.2 SP3 or later are required. A Micro Memory Card with at least 8 MB capacity is mandatory.

Product status, life-cycle status and obsolescence

For this order number, Siemens lists the lifecycle status PM410 – Product Cancellation in the Industry Mall, with the product discontinued as of 01 October 2025. For operators of existing systems, this means the CPU remains technically relevant, but procurement becomes increasingly challenging over time because new units become less available and supply is increasingly dependent on remaining stock, repair services and qualified exchange concepts. It is also worth noting that the CPU 31xT-3 PN/DP historically replaced the older CPU 31xT-2 DP on a spare-parts-compatible basis. For modernisation projects, Siemens generally recommends migration to the S7-1500 platform as the successor system for the phased-out S7-300 family; however, this represents a migration project rather than a plug-compatible 1:1 replacement.

Available EICHLER services and their practical relevance

For the 6ES7315-7TJ10-0AB0, EICHLER offers repair, exchange, used units and new units. This is particularly valuable for maintenance and procurement teams when a system must be stabilised quickly without immediately committing to a complete migration project. Repair is especially suitable when the existing module is already fully integrated into the machine and downtime should be minimised by recommissioning with the existing project configuration. Benefits include technical cleaning, preventive maintenance, comprehensive functional testing and a minimum 24-month warranty. For processes requiring validation, an optional CPU/central module test report can provide additional technical assurance. Exchange, used and new units are particularly beneficial when time pressure, inventory strategy and obsolescence risks must all be considered simultaneously.

Is the 6ES7315-7TJ10-0AB0 still available or has it been discontinued?

Siemens lists the module with the lifecycle status PM410 – Product Cancellation and specifies 01 October 2025 as the product discontinuation date. For operators, this does not automatically mean that supply is no longer possible. In practice, however, repair, exchange services, used equipment and strategic spare-parts stocking become significantly more important because the availability of new units gradually decreases over time. For critical machines, it is therefore not only the part number that matters, but also a reliable service strategy to protect against unplanned downtime.

Which memory card is required for the CPU 315T-3 PN/DP?

The CPU requires a SIMATIC Micro Memory Card (MMC) because no integrated load memory is provided. For full functionality, Siemens specifies a minimum capacity of 8 MB. This is particularly important during procurement, as MMC-related issues frequently lead to commissioning problems, STOP requests or incomplete functionality. Anyone stocking a spare CPU should therefore also keep a suitable MMC available in order to avoid unnecessary delays during replacement.

Which software is required for engineering, diagnostics and service?

Siemens specifies STEP 7 V5.5 SP2 or later together with the S7-Technology option package V4.2 SP3 or later for this CPU. This is important not only for initial engineering but also for service activities such as hardware replacement, diagnostics, firmware maintenance and opening existing projects. In HW Config, the correct SIMATIC Technology CPU profile must also be selected. Without this environment, typical problems occur: the CPU may not appear in the hardware catalogue, technology objects may be unavailable, or service access may be limited.

Can the 6ES7315-7TJ10-0AB0 replace older 315T variants?

Yes. Siemens describes the CPU 31xT-3 PN/DP as a spare-parts-compatible successor to the CPU 31xT-2 DP. Siemens documentation also records the migration from the older order number 6ES7315-6TH13-0AB0 to 6ES7315-7TJ10-0AB0. This is particularly beneficial for operators of older motion-control systems because existing machines can often be kept operational with significantly less effort than would be required for a complete platform migration. Nevertheless, firmware version, project configuration, interface assignments and the technology configuration should always be checked before replacement.

Which motion-control applications is this CPU particularly suited for?

The CPU is designed for machine applications with integrated technology functions and supports up to 8 axes and a total of 32 technology objects, including axes, cams, cam tracks, measuring probes and external encoders. It also provides 4 integrated digital inputs and 8 integrated digital outputs for technology functions such as reference-point detection and high-speed cam switching signals. This makes the CPU especially suitable for existing installations where PLC logic and drive-related motion functions are combined within a single controller.

Is the S7-1500 a direct successor to this CPU?

Siemens identifies the S7-1500 family as the successor platform to the discontinued S7-300 range. However, this should be understood correctly from a technical perspective: it represents a migration path, not a plug-compatible replacement for the 6ES7315-7TJ10-0AB0. If avoiding immediate downtime is the priority, repair, exchange or procurement of an identical replacement unit is usually the faster option. For long-term reduction of obsolescence risks, modernisation of the engineering environment and future-proof spare-parts strategies, a planned migration to the S7-1500 platform should be considered.