RobotStudio event

PROFIBUS ERROR

WE HAVE 2 robot flexpicker with irc5 controller we face a Profibus error we try to correct the error but the problem still we have a cpu alau C400 THAT SHOW slave of the flixpicker 1 MISSING WE TRY TO DO IT FROM THE FLEX PENDANT  by puting new address and assign it to the bus but the problem still