From Legacy Ladder Logic to Real-Time Control: How a Tier-1 Auto Supplier Reduced Line Stoppages 65% Through PLC Modernization

The plant manager at the facility, a mid-sized Tier-1 automotive supplier in northwest Ohio, knew something was wrong the moment the line went down for the third time in a single shift. A pneumatic sensor on press station four had failed, as it had failed dozens of times before. The maintenance crew patched it in forty minutes. But the real problem was not the sensor. It was that the PLC managing that station could not talk to the master control system in real time. When the sensor failed, the operator had to manually log the stoppage, walk to the control room, and alert the scheduling system. By then, the work order system was already behind.