Just a heads up on a problem we had on site recently, and how it was solved.
Added some AENTR flex I/O to an existing ControlLogix system, and could not get comms to the AENTR modules, even though we had proved it locally with my training rig.
Turns out the firmware revision of the site's 1756-ENBT was the culprit, requiring at least 4.007, theirs was 3.xxx something.
I only found a KB article on it by chance....
Caveat : Check your firmwares
Added some AENTR flex I/O to an existing ControlLogix system, and could not get comms to the AENTR modules, even though we had proved it locally with my training rig.
Turns out the firmware revision of the site's 1756-ENBT was the culprit, requiring at least 4.007, theirs was 3.xxx something.
I only found a KB article on it by chance....
Caveat : Check your firmwares