When Dealing with Obsolescence Becomes a Challenge
E Tech Group’s Group Engineering Manager, George Bruce, shares his insight in leading an extensive system upgrade over a weekend. A system integrator upgraded a decades-old obsolete system to a current high-speed system over a weekend. This article originally appeared in Control Engineering. Avoiding Obsolescence: Insights on E Tech Group’s Process: To upgrade and separate the equipment, five systems controlled by a central PLC needed to be migrated to either ControlLogix or CompactLogix and have all communication transitioned to Ethernet. The team needed to map the three decades of piecemeal undocumented upgrades that were currently keeping systems operational. The largest system consisted of a 17 slot PLC-5 rack and 12 hard wired drives, with a mix of 120V digital inputs/outputs and analog inputs. Automation & Control System Needs Upgraded, No Downtime Allowed E Tech Group automation engineers were contracted to update and replace obsolete hardware in a pickle plant. They knew that if the one centralized PLC-5 that controlled five systems responsible for over 50% of pickle production failed, they would be shutting down the entire plant to identify and fix the issue, leading the company to lose valuable time and revenue during peak production periods. To upgrade and separate the equipment, the five systems controlled by the central programmable logic controller (PLC) would need to be migrated and have all communication transitioned to Ethernet. A Piecemeal Automation System, Time Constraints & Michigan Weather Because there were a number of hurdles to take into consideration when beginning this upgrade, it took careful planning to ensure this project could be completed without disrupting production or extending the deadline. First, the team needed to map the three decades of piecemeal undocumented upgrades that were currently keeping systems operational. Second, understanding the facility used only fresh produce, and at certain times ran at … Continued