i've downloaded the program from Fx 2n to Fx 3u cpu by changing the cpu type. It showed the device memory range exceeded will be erased to default values. after downloading there was no error. But my HMI Messung smartline cannot communicate with the cpu. there was no problem with mitsubishi GOT 1000 series HMI . I want to establish communication with FX 3u and Messung smartline HMI. Please help me to solve this problem.`