Posted 22 Jan 2017 Hi I have 2 fx2n 64MR/MT plc I can connect to one of them without any problem but other one the PROG_E LED is flashing and I cannot connect to it for programming and dowanload my backup to it , its error is aboat cpu type or cable. the battery of this cpu disconnected for 10 days. pay attention that I can connect to other CPU same as it(I said at first). thanks every boady Share this post Link to post Share on other sites
Posted 23 Jan 2017 I have paid attention and my conclusion is it is faulty and needs replacing. Share this post Link to post Share on other sites
Posted 25 Jan 2017 Try putting a new battery in it. When PROG_E flashes it is a battery problem. Then reset the PLC and try the Connection Test if you are using GX works or transfer Setup -> Connection Test if you are using GX Developer. If that says it's connected try to download you back-up from your PC to the PLC again. I'm 90% sure the battery is dead and that's why it's in fault. Share this post Link to post Share on other sites
Posted 25 Jan 2017 If it still flashes after replacing the battery, it's a programming issue. Maybe wrong type of CPU set in the Software or something. Share this post Link to post Share on other sites
