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PROGRAMMABLE CONTROLLER

  • US 20070282457A1
  • Filed: 01/29/2007
  • Published: 12/06/2007
  • Est. Priority Date: 07/29/2004
  • Status: Active Grant
First Claim
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1. 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.

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