Users interested in S7 plcsim v5.5 download generally download:
Development interface that combines complex programming algorithms like branch distributors, serial loops with PLC-specific language extensions such as timers querying, inputs addressing, etc.
Runs programs and simulates their behavior using only the software platform without the need for a controller. Programs can be tested for S7-300 and S7-400 devices.
Simulates PLCs for easy training and development purposes. Supports Modbus RTU and TCP protocols as well and verifies an SCADA & HMI configuration.
Use high-level language programming like alternative branching, serial loops or branch distributors to create complex algorithms for PLCs.