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Home Q & A Board Science-Related Homework Help Engineering Electrical Engineering
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bgzhoumi bgzhoumi
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6 years ago
Which of the following statements is NOT correct?
 
  A) The status of each input can be checked from one location and outputs can be forced on and off.
  B) Input (- -) and output (- ( ) -) instruction symbols in the ladder logic represent only data values stored in PLC memory.
  C) All symbols in the RLL represent actual components and contacts present in the control system.
  D) PLCs are not as reliable as electromechanical relays in RLL.
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zxcvbnzxcvbn
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6 years ago
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bgzhoumi Author
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6 years ago
this is exactly what I needed
apelton
wrote...

Yesterday
Thank you, thank you, thank you!
avance37
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2 hours ago
Good timing, thanks!
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