When Version 20 was first released, it had its share of growing pains. As with any major software revision, bugs were discovered. Rockwell released patches, and eventually, the firmware stabilized around the mark.
Whether you are troubleshooting an existing line or trying to update a controller, understanding the quirks of v20.12—especially the update path requirements—can save you hours of downtime. rslogix 5000 firmware 20.12