I once did on a windows machine a serial connexion to an deye inverter and got errors like yours but the values keept coming so i just ignored it. Maybe your slave doesn’t like being called so often.
Did you read this whole thing https://www.openhab.org/docs/administration/serial.html
Thank you for your help. I did try this with another tool (modpoll) and the amount of “calls” in this short time havent been a problem yet.
So i would guess, it would be fine. But I also changed the polling interval to 30.000