Patent ID: 6532508
Filing Date: 2003-03-11
Classification: G05B,H04L,Y02P

Abstract:
A control system for controlling safety-critical processes, havinga first control unit for controlling said safety-critical processes, a plurality of signal units each comprising I/O channels, said plurality of signal units being linked to said safety-critical processes via said I/O channels, a field bus connecting said first control unit and said plurality of signal units, said field bus being an Interbus, and a bus master for controlling communication on said field bus, said bus master initiating circulating telegram traffic transporting telegram data in a predetermined circulation direction across said field bus, and said bus master being connected to said field bus separately from said first control unit and said plurality of signal units, wherein said first control unit is arranged upstream of said plurality of signal units with respect to said circulation direction, and said first control unit comprising a replacer for replacing telegram data addressed to said plurality of signal units.