Help! I’m new to the site, but come with 17+ years in the automation business. I’m just getting back in after being out for a couple of years and I’ve got 4 ABB freq drives that are kicking my tail. I’ve been lurking on the site for a while, but have not seen this kind of problem yet.
These VFDs are tied to a Siemens MEC via a P1 FLN network line. For some reason the VFDs all show up as failed points. I’ve checked the wiring, their addresses, their communication configurations, and reset both the drives and the panel to no avail. I even went so far as to swap out the MEC with another one on site, but the problem persists.
During my trials, I have seen occasional communications restoration (most of the failed drives show back up as normal for a while), but the victory is short lived. My last effort included deleting the drives from the system profile (Insight 3.8) and re-adding them to see if that would kick-start some talking. At this point, I’m hoping that someone out there may have a suggestion to offer. Any help would be greatly appreciated. Thanks!