6ES7315-2EH14-0AB0 is a SIMATIC S7-300 CPU 315-2 PN/DP for modular automation stations. It provides 384 KB of work memory and combines an MPI/PROFIBUS DP interface with a PROFINET Ethernet interface incorporating a two-port switch.

The CPU requires a SIMATIC Micro Memory Card and supports central and distributed I/O arrangements used in established S7-300 systems.

• Executes bit operations in 0.05 µs, word operations in 0.09 µs and floating-point operations in 0.45 µs.
• Provides a 2,048-byte input and 2,048-byte output address space for the configured automation task.
• Stores 500 diagnostic-buffer entries for event and fault analysis.
• Supports up to four racks, including three expansion racks, in the documented S7-300 arrangement.
• Operates in ambient temperatures from 0 to 60 °C when installed within the specified conditions.

• Retain the MPI/PROFIBUS station parameters and PROFINET device configuration from the approved STEP 7 project.
• Use the required Micro Memory Card and verify that its program and firmware state match the replacement CPU.
• Record the rack order, expansion interfaces and distributed-I/O topology before removing the installed processor.
• Recreate the two-port PROFINET cabling without changing device names or network assignments unless the project is revised.
• Validate startup behavior, diagnostics and communications after the hardware configuration has been downloaded.

• Service replacement in established S7-300 machines and process skids.
• Controllers bridging PROFIBUS DP field devices and PROFINET plant networks.
• Multi-rack S7-300 installations requiring a 384 KB central CPU.
• Automation projects maintained with the classic STEP 7 engineering environment.