sruda
Member
I got a used 1769-L35E Ser. A from our customer to use on our new machine. I had updated the firmware to the latest version and started working with the controller.
Things went well for a while, then all of a sudden bits in the program would randomlly unlatch in the controller stopping the program. I reviewed the code many times and saw nothing that would unlatch these bits. I power cycled and re-downloaded the program and everything works great again. There was nothing changed in the program. It will run fine for a few hours then this will happen again.
I have tried reloading the firmware and upgraded again to 20.14. Still having the same issue. when this happens there are no major or minor faults in the controller and a power cycle alone will not recover the PLC. The program must be re-downloaded before it will recover.
Any thoughts? Sure is throwing me for a loop.
Thanks
Sayyed
Things went well for a while, then all of a sudden bits in the program would randomlly unlatch in the controller stopping the program. I reviewed the code many times and saw nothing that would unlatch these bits. I power cycled and re-downloaded the program and everything works great again. There was nothing changed in the program. It will run fine for a few hours then this will happen again.
I have tried reloading the firmware and upgraded again to 20.14. Still having the same issue. when this happens there are no major or minor faults in the controller and a power cycle alone will not recover the PLC. The program must be re-downloaded before it will recover.
Any thoughts? Sure is throwing me for a loop.
Thanks
Sayyed