6ES7317-2AK14-0AB0 Siemens CPU 317-2 DP

July 20, 2026

SIMATIC S7-300 CPU 317-2 DP Technical Guide

Product Introduction

The Siemens 6ES7317-2AK14-0AB0 functions as a high-performance PLC CPU within the S7-300 family. This module provides a central processing unit with 1 MB of integrated work memory. This CPU 317-2 DP supports both centralized I/O structures and distributed automation configurations. The module requires a SIMATIC Micro Memory Card for program and data storage. This model includes two integrated RS 485 interfaces. One interface supports MPI/DP communication up to 12 Mbps. The second interface operates as a PROFIBUS DP master or slave. This CPU supports complex applications like production line control and machine tool automation. The Siemens 6ES7317-2AK14-0AB0 also handles closed-loop control tasks and high-speed counting operations.

Core Value

The Siemens 6ES7317-2AK14-0AB0 offers substantial processing power for binary and floating-point calculations. This CPU 317-2 DP processes 1,000 binary operations in approximately 0.1 microseconds. Therefore, it reduces scan cycle times significantly in large programs. Moreover, the integrated work memory eliminates the need for external storage expansion in most mid-size projects. This design simplifies hardware configuration and lowers overall system costs. Furthermore, the dual PROFIBUS DP interfaces enable flexible network topologies. You can connect remote I/O stations, drives, and HMI panels simultaneously. This capability ensures seamless integration with existing plant networks. Consequently, the Siemens 6ES7317-2AK14-0AB0 increases system availability and reduces wiring efforts.

Technical Insights

This CPU 317-2 DP supports a maximum of 2,048 digital I/O points and 512 analog I/O channels. Specifically, the MPI interface allows communication with up to 32 other S7-300 stations. The PROFIBUS DP interface operates as a master or slave with a maximum transmission rate of 12 Mbps. Meanwhile, the integrated diagnostic buffer stores up to 500 fault messages for troubleshooting. Additionally, this CPU supports real-time clock operation with a backup time of approximately 6 weeks. The Siemens 6ES7317-2AK14-0AB0 also features a protection level system. You can assign passwords to prevent unauthorized program access. This feature ensures data integrity and operational security. Besides, the module supports interrupt processing for time-driven and event-driven tasks. These functions make the CPU suitable for high-speed packaging machines and conveyor systems.

Installation and Maintenance

Install the Siemens 6ES7317-2AK14-0AB0 on a standard S7-300 rail inside a control cabinet. Ensure the ambient temperature remains between 0 and 60 degrees Celsius during operation. Mount the module horizontally for optimal heat dissipation. Firstly, insert the Micro Memory Card into the designated slot before power-up. Secondly, connect the PROFIBUS cables to the corresponding interfaces using proper termination resistors. Thirdly, ground the mounting rail to minimize electromagnetic interference. For maintenance, periodically check the status LEDs for SF, BF, and RUN indicators. Specifically, a solid SF LED indicates a hardware fault, while a flashing BF LED points to communication errors. Replace the backup battery every two years to maintain real-time clock functionality. Moreover, clean the ventilation slots annually to prevent overheating. Always power off the system before removing or inserting any modules. This practice protects the CPU 317-2 DP from electrical damage.