AC800M-PM 866 controller CN1,CN2 communication lost causing application erase
AC800M-PM 866 controller CN1,CN2 communication lost causing application erase in redundant mode.if both of my CN1(172.16.4.158)CN2)172.17.4.158)communication disconnect,the controllers are going to Fault mode and the aplications are got erased.
my customer requirement is even if both network fails the controller should hold the application and once the netwok re-establish it will automatically come back with old values.
any one have suggestion on this issues,please help me out.
Voted best answer
As per RNRP functionality for red network if u remove both network cables from the primary/running controller off course primary controller to go fault to cause switch over to backup without causing plant disturbance. But it doesn't erase any apps running in the controller.
If it's getting erasing may be network storm causing high traffic causing controller load more than 100%.
Check that both primary and secondary network connected to separate sw or vlan made in the managed sw.
Check both cn1 and cn2 are mapping in the RNRP table.
Check for cobtroller logs for more clue