What are ASCII Chart “>ASCII and RTU modes?
ASCII (American Standard Code for Information Interchange) uses 10 bits of data comprised of 7 data bits, 1 parity bit, 1 start bit and 1 stop bit. It uses LRC (Longitudinal Redundancy Check) for error checking. The advantage of ASCII is it allows up to 1 second time intervals to occur between character transmissions without generating an error. It’s most useful when communication is slow. RTU mode (Remote Terminal Unit) contains 4 bit hex characters divided up into 8 data bits, 1 parity bit, 1 start bit, and 1 stop bit. It uses http://en.wikipedia.org/wiki/Cyclic_redundancy_check for more detailed information.”>CRC (Cyclical Redundancy Check) for error checking. RTU has the advantage that it can send more data in the same amount of time but it has to be in a continuous stream (no delays between characters).
