Features:
- Siemens 6ES7318-3EL00-0AB0 executes S7-300 control logic with 1.4 MB of work memory.
- Two serial fieldbus interfaces and one PROFINET port separate three communication paths.
- A required Micro Memory Card provides load-memory and battery-free retention functions.
The CPU combines fast instruction execution with an S7-300 memory model that distinguishes work memory, retained content and MMC-backed load data.
MPI or DP communication can occupy the first serial path while a second DP master/slave interface remains available for another fieldbus segment.
The Ethernet port adds PROFINET IO-controller and open communication services, with its own addressing and commissioning requirements.
The Siemens 6ES7318-3EL00-0AB0 SIMATIC S7-300 CPU 319-3 PN/DP Central Processing Unit may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6ES7318-3EL00-0AB0 SIMATIC S7-300 CPU 319-3 PN/DP Central Processing Unit 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.
Work, load and retained data
- Execution area: Work memory holds the program and data required while the CPU is running.
- Load area: The Micro Memory Card carries the load-memory content used to start and restore the project.
- Retentive subset: Configured retained values persist through the documented restart conditions without a backup battery.
- Card dependency: The CPU requires a matching MMC rather than treating it as an optional archive device.
Separating the fieldbus segments
- First interface: The shared MPI/DP port can serve programming access or a configured PROFIBUS network.
- Second interface: A dedicated DP master/slave port provides another independent fieldbus path.
- Station planning: Each segment keeps its own addresses, transmission settings and connected nodes.
- Role selection: Master or slave operation must match the STEP 7 hardware configuration for that interface.
Industrial Ethernet functions
- IO controller: The CPU can cyclically exchange process data with configured PROFINET IO devices.
- Open communication: TCP/IP, ISO-on-TCP and UDP provide separate message-oriented Ethernet services.
- Physical link: The RJ45 port connects the controller to a 10/100 Mbit/s Industrial Ethernet segment.
- Address agreement: Device names, IP settings and project assignments must refer to the same network configuration.
Project and diagnostic access
- Engineering version: The CPU requires the documented STEP 7 release and hardware support package.
- Online view: Status and control functions expose program and process states during commissioning.
- Diagnostic history: The buffer records controller and module events, including a protected subset across power failure.
- Forced signals: Forcing is available as a controlled commissioning function and must be cleared before normal operation.