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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
What instruction would you select for each of the following discrete input field devices to accomplish the desired task? (State the reason for your answer.)
a. Turn on a light when a conveyor motor is running in reverse. The input field device is a set of contacts on the conveyor start relay that close when the motor is running forward and open when it is running in reverse.
b. When a pushbutton is pressed, it operates a solenoid. The input field device is a normally open pushbutton.
c. Stop a motor from running when a pushbutton is pressed. The input field device is a normally closed pushbutton.
d. When a limit switch is closed, it triggers an instruction ON. The input field device is a limit switch that stores a 1 in a data table bit when closed

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