Where can I found a consolidated list of error codes and better descriptions than what is in the help files? Especially for driver errors!

Currently, there isn't a consolidated list, however, your feedback has been sent to the development team.

I agree, this would be nice to have. A good workaround I've found is to build a page in all my apps that has the Driver Statistics Widget for each driver. It will show in plaintext what's currently wrong with your driver.

Great Suggestion! Thanks Sam.

Thanks again for the comments on here. We have just added driver error codes to our help files. As an example, the link below shows the error codes for the Modbus compatible device driver:
https://www.trihedral.com/help/Content/D_Tags/Dev_Modbus_ErrMsg.htm