Control system for controlling safety-critical processes
AssigneePilz GmbH & Co. KG
InventorsAndreas Heckel, Klaus Wohnhaas, Roland Rupp
Life of this patent
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Abstract
The present invention describes a control system for controlling safety-critical processes. The control system has a first control unit for controlling a safety-critical process and at least one signal unit linked to the safety-critical process via I/O channels. It further comprises a field bus connecting said first control unit and said signal unit, and a bus master for controlling communication on said field bus. Said first control unit and said signal unit each comprise safety-directed arrangements for ensuring failsafe communication among each other. Said bus master is connected to said field bus separately from said first control unit and said signal unit.
Claims16
A control system for controlling safety-critical processes, having
- a 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.
A control system for controlling safety-critical processes, having
- a first control unit for controlling said safety-critical processes,
- at least one signal unit comprising I/O channels, said at least one signal unit being linked to said safety-critical processes via said I/O channels,
- a field bus connecting said first control unit and said at least one signal unit, and
- a bus master for controlling communication on said field bus,
- wherein said bus master is connected to said field bus independently from said first control unit and said at least one signal unit, and
- wherein said first control unit and said at least one signal unit each comprise safety-directed arrangements for ensuring failsafe communication across said field bus.
Dependencies are inferred from the claim text.