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Author Question: The examine if open instruction ________. A) Is an input instruction only used for field devices ... (Read 137 times)

vinney12

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on: Jul 28, 2018
The examine if open instruction ________.
 
  A) Is an input instruction only used for field devices with NC contacts
  B) Can only be assigned an input file address starting I:
  C) Has the following logic symbol (- -)
  D) Has the following logic symbol (-/-)

Question 2

The light source of a photoelectric sensor used in a long distance sensing application is ________.
 
  A) An incandescent lamp B) A light emitting diode
  C) A photo cell D) A laser


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sultansheikh

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Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

D


vinney12

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Reply 2 on: Jul 28, 2018
Great answer, keep it coming :)

xiaomengxian

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Reply 3 on: Yesterday
Wow, this really help

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