We have arround 7 APC800 from B&R, recently some two touch panels have completly blacked out, the touch panel is connected on Link one of the apc 800 throug a serial com.
The link 1 LED status indicator is steadly flashing and that means that the touch panel power was interupted. If i unplug the touch panel from link 1 , it's status indicator lights steadly, implying there is no problem with the apc800 without the touch panel.
Access to the APC800 can also be achieved if a PG is connected, through ethernet and i can monitor the process very well, but however, logon is done automatically and the higher level password i use to logon at the touch panel is not accepted at the PG. it seems the auto logon is restricated to operator rights.
Before thinking of the reinstalling the touch panel divers, has anyone had a similar situation before or any other idea?