Features:
- The 768 KB integrated work memory is divided equally between executable code and process data.
- Two isolated RS485 interfaces separate MPI/DP access from a second PROFIBUS DP path.
- An IF 964-DP submodule position provides a documented route for adding a third DP interface.
Siemens 6ES7414-3XJ00-0AB0 processes the user program while its process image and I/O address areas exchange values with central and distributed modules.
Load-memory cards hold larger project data sets, but the integrated code and data work-memory areas remain fixed for runtime execution.
The CPU supports monitoring, forcing, breakpoints, status blocks, and diagnostic-buffer evaluation as distinct commissioning functions.
The Siemens 6ES7414-3XJ00-0AB0 SIMATIC S7-400 CPU 414-3 may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6ES7414-3XJ00-0AB0 SIMATIC S7-400 CPU 414-3 Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
How Project Data Reaches Runtime Memory
- Load Storage: Blocks, symbols, comments, configuration, and parameter data reside in integrated or card-based load memory.
- Code Execution: Runtime code blocks use the dedicated code section of work memory.
- Process Data: Data blocks and active application values use the separate data section of work memory.
- System Area: Markers, timers, counters, stacks, and communication resources occupy system-managed memory.
Assignment of the Three PROFIBUS Paths
- MPI/DP Interface: The first RS485 connection combines engineering, operator, routing, and DP master or slave services.
- Second DP Interface: The dedicated PROFIBUS path handles a larger distributed-I/O address area and a higher documented slave count.
- Optional IF Slot: An IF 964-DP submodule uses the third position when another PROFIBUS path is required.
- Interface Power: Each integrated MPI/DP connection can supply documented auxiliary interface current to connected devices.
CPU Position Within the S7-400 Station
- Central Rack: The CPU occupies two slots and controls modules assigned to the central station.
- Expansion Paths: Interface modules extend the station to documented expansion units without changing the CPU's central role.
- Multicomputing: A UR1 or UR2 configuration can coordinate multiple CPUs when the project assigns shared rack resources.
- Distributed Stations: PROFIBUS interfaces exchange the configured input and output areas with remote DP devices.
Data Retention Across CPU Starts
- Cold Restart: Process images, markers, timers, counters, and data blocks return to program-defined initial values.
- Warm Restart: Non-retentive areas reset while configured retentive values and data blocks keep their last valid state.
- Restart: Backed-up data and the process image retain their values so execution resumes at the interrupted instruction.
- Backup Requirement: Warm restart after power interruption and full restart behavior depend on backed-up operation.