Robocopy parameters in Autoit

Hello,

I am trying to add the following parameters to Robocopy embedded in an the Autoit script below: /S /COPY:DT /R:4 /LOG+:"C:\Script.log"
Any suggestions how to add it? 
Thanks in advance!

RunWait(@ComSpec & ' /k ' & 'robocopy.exe "'  & $SR1 & '" "' & $DS1 & '" ' & $PLC, @SystemDir)