Device and method for failsafe monitoring of a moving machine part
AssigneePilz GmbH & Co. KG
InventorMichael Schlecht
Life of this patent
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Abstract
A device for failsafe monitoring a number of passes of a moving machine part through a defined movement region comprising an input for receiving an encoder signal, which represents a motion value of the moving machine part. The device further comprises a failsafe evaluation unit for providing a failsafe shutdown signal as a function of the number of passes of the moving machine part through the defined movement region. The failsafe evaluation unit is configured to determine the number of passes of the moving machine part through the defined movement region from the motion value.
Claims20
A device for failsafe monitoring a number of passes of a moving machine part through a defined movement region, comprising:
- an input for receiving an encoder signal, which represents a motion value of the moving machine part, and
- a failsafe evaluation unit for providing a failsafe shutdown signal as a function of the number of passes of the moving machine part through the defined movement region,
- wherein the failsafe evaluation unit is configured to determine, from the motion value, the number of passes of the moving machine part through the defined movement region and a first and a second moving direction of the moving machine part, in a failsafe manner.
A method of operating a safety system including a failsafe evaluation unit for failsafely monitoring a number of passes of a moving machine part through a defined movement region, the method comprising:
- receiving an encoder signal at an input of the failsafe evaluation unit, which represents a motion value of the moving machine part,
- configuring the failsafe evaluation unit to determine, from the motion value, the number of passes of the moving machine part through the defined movement region and a first and a second moving direction of the moving machine part, in a failsafe manner, and
- further configuring the failsafe evaluation unit to provide a failsafe shutdown signal as a function of the number of passes of the moving machine part through the defined movement region.
A non-transitory computer readable storage medium containing a computer program having a program code which when executed on a processor of an evaluation unit in a safety system for failsafely monitoring a number of passes of a moving machine part through a defined movement region, causes the processor to perform the steps of:
- processing an encoder signal received at an input of the failsafe evaluation unit, which represents a motion value of the moving machine part,
- determining, from the motion value, the number of passes of the moving machine part through the defined movement region and a first and a second moving direction of the moving machine part, and
- providing a failsafe shutdown signal as a function of the number of passes of the moving machine part through the defined movement region.
A device for failsafe monitoring a number of passes of a moving machine part through a defined movement region, comprising:
- an input for receiving an encoder signal, which represents a motion value of the moving machine part,
- a failsafe evaluation unit for providing a failsafe shutdown signal as a function of the number of passes of the moving machine part through the defined movement region, and
- a memory, in which a predefined value, which represents a boundary of the defined movement region, is stored,
- wherein the failsafe evaluation unit is configured to determine, from the motion value and the predefined value, the number of passes of the moving machine part through the defined movement region.
A device for failsafe monitoring a number of passes of a moving machine part through a defined movement region, comprising:
- an input for receiving an encoder signal, which represents a motion value of the moving machine part, and
- a failsafe evaluation unit for providing a failsafe shutdown signal as a function of the number of passes of the moving machine part through the defined movement region,
- wherein the failsafe evaluation unit is configured to:
- determine, from the motion value, the number of passes of the moving machine part through the defined movement region, and
- provide a further signal, the further signal being at least one of a warning signal if the number of passes of the moving machine part through the defined movement region exceeds a defined value and a release signal if the motion value falls below a second defined value or represents a stop.
A device for failsafe monitoring a number of passes of a moving machine part through a defined movement region, comprising:
- an input for receiving an encoder signal, which represents a motion value of the moving machine part, and
- a failsafe evaluation unit for providing a failsafe shutdown signal as a function of the number of passes of the moving machine part through the defined movement region,
- wherein the failsafe evaluation unit is configured to:
- determine, from the motion value, the number of passes of the moving machine part through the defined movement region, and
- establish the defined movement region based upon the motion value and at least one additional factor associated with said moving machine part which, in combination with said motion value, establishes the boundaries of the defined movement region.
Dependencies are inferred from the claim text.