Dear iant.
Thanks a lot again for the replay.
I have a problem between the connection of the pro-face HMI and FX2N Mitsubishi PLC...the problem is as follows:
1- when the PLC to HMI cable is connected the HMI screen is getting off
....! And when the cable is not connected the screen is working normally.
note: I have spare Plc and HMI and I tried still the same problem.....I have made also another cable by my self but still getting same issue.
By the way...these PLC and HMI is working for last 6 year without any issue....just yesterday I had this problem....!!
Thanks in advance.