volga
Member
hi all,
we have been facing blind plc tripping of control logix 5555. all of sudden all cards starts blinking and communication is lost. we could not be able to find what major or minor fault came in. Only solution is to cycle power as stated in LOGIX help. after doing the same "connected to controller" dialog box appears and major error displayed as "power up fault" unrecoverable fault error code 60" which is probably due to power cycling from MCB. the original reason for plc failure is still unknown.after same failure plc ran successfully for 6-7 months and failure occured on yesterday. Our process manager said i never seen PLC failure in my previous company. is there any problem with ground loops or earthing problem. earth resistance is 5.5 Ohm between neutral and earth.
we have been facing blind plc tripping of control logix 5555. all of sudden all cards starts blinking and communication is lost. we could not be able to find what major or minor fault came in. Only solution is to cycle power as stated in LOGIX help. after doing the same "connected to controller" dialog box appears and major error displayed as "power up fault" unrecoverable fault error code 60" which is probably due to power cycling from MCB. the original reason for plc failure is still unknown.after same failure plc ran successfully for 6-7 months and failure occured on yesterday. Our process manager said i never seen PLC failure in my previous company. is there any problem with ground loops or earthing problem. earth resistance is 5.5 Ohm between neutral and earth.