title: can python software take place of logic ladder program in PLC through modbus?
body: <p>Trying to figure out the best way of controlling industrial PLC's with Raspberry Pi/linux server - specifically using python and pymodbus (modbusTCP) over ethernet...</p>
  
  <p>Once the PLC internal registry is mapped properly to modbus, can software written in python take the place of ladder logic programming in the PLC and control it completely? </p>
  
  <p>Or will ladder logic/ native PLC code still need to be written?</p>