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PLCSIM - help to simulate I/O, without using real hardware

Step 1. Download "SIMATIC_S7_PLCSIM_V5.4_SP4.exe" from Siemens site, link here

Step 2. Open text file, input following code and change name file to "PLCSim.reg"
Windows Registry Editor Version 5.00

"VersionString"="V5.4 + SP4"
"MainFile"="C:\\Program Files\\Siemens\\Plcsim\\s7wsi\\S7wsvapx.exe"
"Path"="C:\\Program Files\\Siemens\\Plcsim"


Step 3. Run above file: double click and run it

Step 4. Install PLCSIM file (file download on Step 1)

Step 5. Make simple hardware/ program

Step 6. Download hardware: [1] open simulation -> [2] run PLC -> [3] download hardware

Step 7. Download software: [1] still open Simulation -> [2] stop PLC -> [3] download program
Note: Step 6 and Step 7: if using "RUN-P" in simulation -> don't need to stop/start PLC to download software/hardware

Step 8. Simulate: open input/output variable at "Insert" menu. Click on input 0.0, then output 0.0 and 0.1 will be ON as in program OB1


  1. At this level, PLC high-speed serial line with the decentralized field devices to communicate. plc programming

  2. not working, to install plcsim as above it is asking to install first any of these : S7-PLCSIM V5.4, V5.4 incl. SP1, V5.4 incl. SP2, V5.4 incl. SP3 or V5.4 incl. SP4 must be installed

    1. Please try yourself to install requested software as in notification. The article is too late to remember how to do.


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