Technician or installer needs to set up Modbus communication for their data logger, but they are unable to set even, odd, or no parity on the CL.
Modbus settings when configuring the Conext CL
Conext CL inverters on firmware 02.06.04 have a bug where the options for Modbus Parity include the whole alphabet.
In the Modbus menu, set Modbus Parity to capital 'E' for even parity, capital 'O' for odd parity, or capital 'N' for no parity. This is an issue that will be fixed in future firmware revisions.