Hello. I have M50 CNC. I need to upload and download PLC program via rs-232. I can upload and download parameters, programs and so on via rs-232. But when I try to upload and download PLC with GX-developer, it gives a communication error. I tried to change PLC-bits according to M60 controllers manual but it didn't help. Maybe I set a wrong type of a controller in GX-developer or I should have used Medoc software instead of GX-developer. Please help me. Thank you in advance.