Orion® PC-based motion controllers from Ormec (Rochester, NY) now offer Ethernet connections to Allen-Bradley PLCs that support Ethernet. The controllers can also be used for communications with PCs running popular human-machine interface software packages.
REB's (Menomonie, WI) PLC-controlled IVS system uses air purge and vacuum to clean containers before filling with aqueous or viscous product. It handles volumes from less than 1 oz to 1 L with accuracies of ±0.5% of the fill weight.
A white paper on trends in control system I/O is available from Rockwell Automation/Allen-Bradley (Milwaukee, WI). Provides a basic understanding of what I/O is and a brief summary of the evolution of control system I/O.