communicate with KGL K120S PLC to:-
1. Create HMI (using LabVIEW)
2. Write to Timer and Counters or Registers
3. Read From Counters and Timers or Registers
4. Modbus is available in K120S
PLC Communication Function (Page 8-1)
http://foster.pl/pdf/plc/manuals/MK120S_Users_Manual.pdf