unhandled exception no response from plc

[Allan19111911]

Hello all, anyone have any issues with comm faults,  a few times a day i get a unhandled exception no response from plc error.  I have a slc 505 in my basement running my aquarium,  my pc is upstairs.  This has been happening for months, i assumed it was because i was using one of those powerline bridges to get the ethernet down to the plc.  i just upgraded it to a wifi bridge and get the same result. Now i don't know where the issue is


Thanks in advance
Allan

[Godra]

If you are not using the latest version of AHMI then upgrading your project would probably be the first thing to do.

[Allan19111911]

do you think it's a bug with the software?

[Allan19111911]

found the culprit, i dug into the error a bit more and found it had to do with a timer ,  i had a timer set up to constantly update the rtc in the plc.  not sure why, but occasionally the plc would not respond.  since the timer as a "luxury" item, i just deleted it and haven't had a drop out since.