Safety control device, safety control system, and method for detecting communication error
AssigneesJtekt Corporation, ELAN Schaltelemente GmbH & Co. KG
InventorsTsutomu ARAKI, Hirofumi Kato, Sutemaro Kato, Michael Niehaus
Life of this patent
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Abstract
A safety control device for ensuring safety of an object to be controlled, including: communication unit which is used for communication with another safety control device and uses a frame including a test bit string T having correlation with a base bit string B; and detection unit which compares with the base bit string B the test bit string T included in a frame having been received from another safety control device, thereby determining the number of bit errors in the frame.
Claims13
A safety control device for ensuring safety of an object to be controlled, comprising:
- a communication unit that communicates a frame including a test bit string having correlation with a base bit string with another safety control device;
- and
- a detection unit that compares the test bit string included in the frame received from the another safety control device with the base bit string, and detects a number of bit errors in the frame.
A safety control system comprising:
- a plurality of safety control devices for ensuring safety of objects to be controlled;
- and
- a communication line that connects the safety control devices with each other,
- wherein each of the safety control devices includes:
- a communication unit that communicates a frame including a test bit string having correlation with a base bit string with at least another one of the safety control devices through the communication line;
- and
- a detection unit that compares the test bit string included in the frame received from the another safety control device with the base bit string, and determines a number of bit errors in the frame.
A method for detecting an error in communication between safety control devices that ensures safety of an object to be controlled, the method comprising:
- receiving by one of the safety control devices from another of the safety control devices a frame including a test bit string having correlation with a base bit string;
- and
- detecting a number of bit errors in the frame by comparing the test bit string included in the frame received from the another safety control device with the base bit string.
A method for detecting an error in communication between safety control devices that ensures safety of an object to be controlled, the method comprising:
- generating, in a first safety control device, a frame including a test bit string having correlation with a base bit string;
- transmitting the frame generated from the first safety control device to a second safety control device;
- and
- detecting, in the second safety control device, a number of bit errors in the frame by comparing the base bit string with the test bit string included in the frame.
Dependencies are inferred from the claim text.