@Jan-Reitinger Hi Ja, thank you very much, I'll give it a try one of these days. When I have some results I'll post the outcome here.

@mikeyh Hi Mike,

According to the screenshots provided, I would suspect that the Response timeout parameter in MBDrv is too short - did you try to enlarge it?

I also use passive tag in my projects and don't face any issues when the communication parameters are correctly set.

One more question: What is the RS485 Baudrate set in the Monarco Driver?

Kind regards
Tomas