PLC to HMI Station communication error code 0x80000104

PLC to HMI Station communication Problem _ error code 0x80000104

This happened when the PLC was not working for almost a year.. When we try to start the system found ###### at HMI and the Bus fault signal is BF is blinking yellow

Normally, I would ignore a thread with such poor description of the problem.
But since you are from Libya and the 1-year down period may be due to recent problems in your country, I shall try to help.

The message just say that there is no connection from the HMI to the PLC.
If I were in your situation, I would start with loading the program in the PLC from scratch. And depending on how it goes, I would investigate the diagnostics buffer and the Hardware diagnostics to find out what else may be wrong.

You can also help by describing in much more detail what your system consist of and what it does.

Thanks a lot Jesper, I do appreciate your quick response, As of this moment i still gathering all the details at location, how and what are the status of the signal at PLC and HMI. Will advise ASAP.

Thanks, jesper... The problem was solved by reloading the back up program to PLC