Technical data

Programming with STEP 7
Manual, 05/2010, A5E02789666-01 475
22 Testing using the Simulation Program (Optional
Package)
22.1 Testing using the Simulation Program S7 PLCSIM (Optional
Package)
With the optional software package PLC Simulation you can run and test your program on a
simulated programmable controller that exists on your computer or programming device (for
example, Power PG). As the simulation is realized completely by the STEP 7 software, you do not
require any S7 hardware (CPU or signal modules). Using the simulated S7 CPU you can test and
troubleshoot programs for S7-300 and S7-400 CPUs.
This application provides a simple user interface for monitoring and modifying the various
parameters that are used in your program (for example, for switching inputs on and off). You can
also use the various applications in the STEP 7 software while your program is being processed by
the simulated CPU. For example, you can monitor and modify variables with the variable table.