The CPU 317-2 DP is a CPU with a large program memory. It is used in installations which have distributed automation structures in addition to a centralized I/O. It can be used, for example, as a central controller in production lines or as a machine controller with stringent requirements on machining speed.

It has been optimized in terms of its quantity framework for using SIMATIC Engineering Tools, e.g.:

• Programming with SCL
• Sequence control programming with S7-GRAPH

In addition, the CPU offers an ideal platform for simple technology tasks implemented in software, e.g.,:

• Easy Motion Control
• The solution of closed-loop control tasks with STEP 7 blocks or the runtime software Standard/Modular PID Control

Extended process diagnostics can be achieved by using SIMATIC S7-PDIAG.

• Password protection;
  a password concept protects the user program from unauthorized access.
• Block encryption;
  the functions (FCs) and function blocks (FBs) can be stored in the CPU in encrypted form by means of S7-Block Privacy to protect the know-how of the application.
• Diagnostics buffer;
  the last 500 error and interrupt events are stored in a buffer for diagnostic purposes, of which 100 are stored retentively.
• Maintenance-free data backup;
  the CPU automatically saves all data (up to 256 KB) in case of power failure so that the data are available again unchanged following voltage recovery.