your calculations are in order. With the tests we did above, I am afraid you received a PLC with wrong calibration data. The calibration is a way how to ensure that when you set a desired voltage through Modbus registers, it will in fact set the correct voltage on the terminal connectors. The calibration process is one of many throughout the assembly of the unit. The calibration is done on our testbenches and it means you have to send the unit back to us. We sincerely do apologize for this.
Please send me ([email protected]) your number of order for this PLC and I will get back to you with further information.
Thank you very much,