Safety controller and safety system
AssigneeSick AG
InventorsDanilo KNAB, Mathias AMS, Dennis MÜNICH
Life of this patent
Estimating the term…
Abstract
The present invention relates to a safety controller for the safety-directed monitoring and control of a machine, said safety controller having at least one monitoring input that is configured to receive a detection signal from a protective device; at least one control output that is configured to output a shutdown signal to the machine to be monitored and to be controlled; at least one bypass input that is configured to receive a bypass demand from an independent control system. The invention further relates to a safety system having a safety controller and having at least one protective device connected to the safety controller.
Claims15
A safety controller for the safety-directed monitoring and control of a machine, said safety controller comprising
- at least one monitoring input that is configured to receive a detection signal from a protective device;
- at least one control output that is configured to output a shutdown command to the machine to be monitored and controlled;
- at least one bypass input that is configured to receive a bypass demand from an independent control system;
- at least one configuration input that is connected to the evaluation unit and that is configured to receive a respective configuration signal;
- and
- an evaluation unit that is connected to the monitoring input, to the bypass input, and to the control output and that is configured to generate the shutdown command on the basis of a received detection signal, wherein the safety controller is operated in a bypass mode for a predefinable bypass time period divided into one or more part time periods after the reception of a bypass demand, with no shutdown command being output in the bypass mode at least during a part time period even on a reception of a detection signal,
- wherein the evaluation unit is configured to determine the bypass time period and/or at least a part time period of the bypass time period on the basis of the received configuration signal.
A safety system having a safety controller and having at least one protective device connected to the safety controller, said safety controller comprising
- at least one monitoring input that is configured to receive a detection signal from a protective device;
- at least one control output that is configured to output a shutdown command to the machine to be monitored and controlled;
- at least one bypass input that is configured to receive a bypass demand from an independent control system;
- at least one configuration input that is connected to the evaluation unit and that is configured to receive a respective configuration signal;
- and
- an evaluation unit that is connected to the monitoring input, to the bypass input, and to the control output and that is configured to generate the shutdown command on the basis of a received detection signal, wherein the safety controller is operated in a bypass mode for a predefinable bypass time period divided into one or more part time periods after the reception of a bypass demand, with no shutdown command being output in the bypass mode at least during a part time period even on a reception of a detection signal,
- wherein the evaluation unit is configured to determine the bypass time period and/or at least a part time period of the bypass time period on the basis of the received configuration signal.
Dependencies are inferred from the claim text.