Thank you All ,

I will have a look and give it a try this weekend, but both Ingvar and Luciano
pointed me in the direction

I only need to check the SERIN2 command to see how to handle the incomming string in my previous msg

Precision is 2 decimals

The project is to read out 2 position absolute encoders
which are polled by a controller over a RS485 line at 9600bd

Thanks again to everyone who helped me

Walter