Hello,

I am trying to use the old version of the MODBUS(RTU) protocol in TIA Portal with mode of 104. And I cannot connect the database of Modbus_Master to MB_DB of Modbus_Comm_Load as I usually do this with newer version.

Does anyone know how to fix this?

-Aleksandr

Lol,

I have just found an answer:

Just put the name of the database like this: "Modbus_Master_DB".MB_DB