FX1S-30MT Downloading of MAIN Program Failed

[freddy.salguero]

I have a problem when trying to download a program from a FX1S-30MT PLC. I am using a SC-09 USB cable. The software i am using is GX Developer 8. When trying to download the MAIN program the screen in the attachment appears. I tested the download from another PLC of same model and have no problems, therefore the cable is ok, and the laptop is ok. When downloading of the parameters and comments does not give error, just when trying to download MAIN. Also I tested connection with Test Connection button and says communication is ok. Anyone who can help? I have a doubt, how can i see the communication parameters on the PLC side? Thanks a lot

[Ron_S]

Download = put a program in to the PLC Upload = receive a program from the PLC

[freddy.salguero]

Ron_S I was trasnferring from PLC to Laptop then it would be uploading according to what you posted

[Crossbow]

You are trying to upload, as I can see the dialog says Read From PLC. Perhaps the PLC is password protected? Is there a memory module installed? Program may contain some invalid steps or corruption.