S7-PLCSIM is fully integrated into STEP 7. This allows the use of additional functions:

• Test and startup functions of STEP 7
• Test functions of the programming languages used (see application area)

Further user-friendly functions are available during the test with S7-PLCSIM:

• Different operating modes:
  • Continuous
  • 1 cycle
• Display of accumulators, block register, and nesting stacks
• Operator interface for monitoring and modifying inputs, outputs, bit memories, timers, counters, and data
• Triggering error organization blocks
• Reading/writing process values
• Changing the execution mode (e.g. 1 cycle)

Mode of operation

S7-PLCSIM simulates a SIMATIC S7-CPU with the associated process images. The program to be tested is loaded into the simulated S7-CPU and runs on it in exactly the same way as on real hardware. S7-PLCSIM also supports an interface that allows the exchange of process values between S7-PLCSIM and other Windows applications. Communication is based on the included PROSIM interface that can be programmed per COM object.