Process control at IHF is standardized on Allen Bradley's PLC family, a combination of PLC-5s, SLC-5s, PLC-2s, and SLC-100s and -150s.
"Most of the PLCs are used in stand-alone configurations, with a single processor running a machine," notes Mark Reich, automation engineer for IHF. Some PLC-5s are also used for line control, with one controller running a line incorporating numerous machines. Operator interfaces are PC-based using Visual Basic for supervisory systems.