SIMATIC S7-300 CPUs combine high performance, reduced space requirement and minimized maintenance costs, and thereby considerably improve the price-performance ratio.

• High processing speed;
  for example, 0.05 µs for bit operations or 0.45 µs for floating-point operations in CPU 315-2 DP,
  0.004 µs for bit operations or 0.04 µs for floating-point operations in CPU 319-3 PN/DP
• Expanded quantity framework
• SIMATIC Micro Memory Card (MMC) as load memory:
  A complete project—including symbols and comments—can be stored on the MMC. Read/write access is also available in RUN. This reduces service costs
• Backup of RAM data on the MMC without battery
  

Programming

CPUs are programmed with STEP 7 in LAD, FBD or STL. The following programming tools may be used: STEP 7 Basis and STEP 7 Professional.

The engineering tools (e.g. S7-GRAPH, S7-HiGraph, SCL, CFC or SFC) can be run as of CPU 314.

Standard CPUs

Standard CPUs are programmed with STEP 7, V5.2 Service Pack 1 or higher.

Compact CPUs

Compact CPUs are programmed with STEP 7, V5.3 Service Pack 2 or higher. Older STEP 7 versions require an upgrade.