Rslogix: 500 81000 Cpr9 W Master Disk
As he arrived on site, John was greeted by a familiar sight: an 81000 series PLC, still chugging along after all these years. He smiled, remembering the countless hours he had spent programming and troubleshooting these units. The client handed him a CD with the latest RSLogix 500 software: CPR9, with a Master Disk.