i would like to write comments to the twido telemecanique PLC. for a start, i want to send a simple PLC program(input- 1 switches output1) via hyperterminal and veryfy it's functionality.

how exactly can i write a simple on PLC program in modbus format so that my PLC will understand it and be able to excute the instruction.

in other words, i would like to convert the program from list/ladder languge to ASCII characters so that transfer is through hyperterminal and not the twido enviroment.

any resources or comments will be appreciated

thank you in advance.

 

get the book Home automation basics. It does it using vb, but it can easily be applied to PIC C