SIMATIC S7-300PLCPhase-out
Modular mid-range controller on a DIN-rail profile with up to four racks, MPI/PROFIBUS DP interfaces and, on PN CPUs, PROFINET. Programmed mainly in STEP 7 V5.x (LAD/FBD/STL/SCL); many plants still run S7-300 with ET 200M remote I/O.
- Manufacturer
- Siemens
- Product line
- SIMATIC
- Device type
- PLC
- Communication
- PROFIBUSPROFINETEthernet and IP networking
- Engineering software
- SIMATIC STEP 7 V5.xTIA Portal (STEP 7 Basic/Professional)
- Models / series
- CPU 312, CPU 313C, CPU 314, CPU 314C-2 DP/PN, CPU 315-2 DP, CPU 315-2 PN/DP, CPU 317-2 PN/DP, CPU 319-3 PN/DP, CPU 31xT, CPU 315F/317F
- Official product page
- www.siemens.com
Availability: Siemens states that the SIMATIC S7-300/ET 200M system families remain available until 2033; successor platform for new projects is S7-1500 with ET 200MP/SP. Manufacturer statement ↗
Documentation · 11
S7-300 - Industrial Ethernet / PROFINET CP 343-1 Lean - Part B
Device manual of the CP 343-1 Lean: S7 and open communication (TCP/UDP), PROFINET IO device, web diagnostics, LED displays and technical data.
Link verified 2026-10-02
S7-CPs for Industrial Ethernet Configuring and Commissioning Manual Part A
General part for S7-300/400 Ethernet CPs: connection types, NetPro configuration, FETCH/WRITE, diagnostics with NCM S7.
Link verified 2026-10-02
Modbus/TCP via the integrated PN interface of the S7-300/400 CPU
Licensed Modbus/TCP blocks (MODBUSPN) for client/server communication over the PROFINET interface of S7-300/400 CPUs: parameters, data areas, error codes.
Link verified 2026-10-02
SIMATIC S7-300 CPU 31xC and CPU 31x: Installation
Configuration rules, mounting, wiring, addressing, commissioning, maintenance and debugging of S7-300 stations with CPU 31xC/31x, including MPI/PROFIBUS/PROFINET networking.
Link verified 2026-10-02
SIMATIC S7-300 CPU 31xC and CPU 31x: Technical specifications
Operating and display elements, communication functions, memory concept, cycle and response times and technical data of each CPU 31xC/31x.
Link verified 2026-10-02
SIMATIC S7-300 CPU 31xC Technological Functions
Integrated counting, frequency measurement, pulse-width modulation, positioning and PID control of the compact CPU 31xC.
Link verified 2026-10-02
S7-300 Automation System: Getting Started CPU 31x: Commissioning
Step-by-step first commissioning of an S7-300 CPU 31x with STEP 7: hardware set-up, configuration, a first program and testing.
Link verified 2026-10-02
SIMATIC S7-300 Instruction list S7-300 CPUs and ET 200 CPUs
Instruction list with execution times, organization blocks, SFCs/SFBs and system status list overview of S7-300 and ET 200 CPUs.
Link verified 2026-10-02
SIMATIC S7-300 Module data
Technical data, wiring diagrams and diagnostic behaviour of S7-300 digital, analogue, power supply and interface modules (also used in ET 200M).
Link verified 2026-10-02
System Software for S7-300/400 System and Standard Functions
Reference of organization blocks, system functions (SFC/SFB), diagnostic data records and the system status list (SZL) for S7-300/400 programs.
Link verified 2026-10-02
SIMATIC Programming with STEP 7 V5.5
SIMATIC Manager projects, hardware configuration (HW Config), symbol tables, blocks, LAD/FBD/STL programming, download and testing for S7-300/400.
Link verified 2026-10-02
Diagnostics · 0
No reviewed diagnostic records for this family yet.