Dear sir,
Please teach me how does serial communication works and how i create the serial I/Os in the ladder logic.
During read the book of (john Iovine) PIC microcontroller project book (chapter 8) i saw the input output serial communication project but i did not understand that how its work and how i create the ladder logic its.
Kindly can you teach me with the help of ladder logic and i attach the some Microsoft word format pictures to help of its.

Thanks you

Muhammad Amjad