Hi everyone,
i want to use mobdus protocol with pic16f877a.
i wanna know that if i use 20MHz crystal with pic16f877a then what maximum baudrate modbus supply/support ?
and what would be the effect if i use 4MHz Crystal instead of a 20MHz crystal?
can modbus operate at 19200 baudrate when i will use 4MHz crystal?
Hi,
I think you are working on Modbus RTU slave for more info and clarifications for your doubts refer this link
have look at attached pdf for modbus specifications on serial.
Look at EDA thread.