Problem downloading program to C20 CPU74E

[bagisachin 0]

Dear Forum, When trying to download a program into a sysmac c20 cpu74e plc i am getting this error: xxxxMT ERR where xxxx is the memory address of the last instruction that was successfully downloaded. This address however is not always the same. Can anyone please help me out with this one. I did perform a memory clear before downloading. The motherboard is 3g2c7 cpu13e and not 3g2c7 cpu14e. can anyone explain that to me?

[Guest SvS]

Could it be that the PLC is a CPM1?

[bagisachin 0]

No it's sysmac c20. I am using a tape recorder and programmer PR015 to download the program. The funny thing is that I did it successfully in one PLC three weeks ago. Either there is a problem with the tape recorder or the RAM memory in the PLC.