Mitsubishi FX-80-MR PLC

[Jean-Paul]

Good evening,

Sorry about my English i am from Belgium

I can declare inputs and ouputs  without problem and write the program to the plc.

From the moment i want to download an program with output and  inputs but without

external declaration (x0, yo,....) i get a red blinking led (program error). Even at that moment  i can compile and simulate teh program withou failure. Even downloading does not give any failure but only the red led is blinking 

[colandra]

I have read your issue.

What programming software are you using, and what PLC are you communicating with.

Something to check quickly, if there is a backup battery on the PLC, make sure it is plugged in.

Regards

Colandra

 

[Crossbow]

Not sure what you mean by a program with no external declaration.  The only method to reference I/O is with the X and Y addresses.

Maybe share a copy of the program so we can see if there is anything obvious?

[Parky]

I have a feeling you are trying to use either GXDeveloper or GXworks2, these do not support the FX only the FX0-3U seen this before & it is probably configured for FX2N or one of the later that is why it compiles & works on a simulator, other problems can be that although it appears that it can be downloaded, if using GXWorks & some of the tags (labels) have not been allocated to actual bits/words like M or D then the old FX's do not support the compile of the un-assigned addresses (these being in the M900 range) .