Error MSG will come during online "run time error #42(unknown exception task = unknown)"
i have problem with my ac500 plc(redunant) . when i am going to online it shows the error msg after 5 or 10 min it automatically log out .after that i cant login via same IP address(it shows communiction error ,logout performed). Then again i restart my plc, it communicate but same error msg will comes after some time and immediately logout .
Note: i was uploaded same program in both plc. Why this error will come ? what is the remdy for this error.Any one have the solution for this problem share me .it happend during my commisioning time so i need urgently need solution for this problem.
thanks in advance.
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