With reference to IREF shown, if the pushbutton is momentarily actuated the data in the IPAGE:
A)changes immediately.
B)is latched in for one scan.
C)executes immediately.
D)executes after a delay of one scan.

Question

With reference to IREF shown, if the pushbutton is momentarily actuated the data in the IPAGE: 
A)changes immediately. 
B)is latched in for one scan. 
C)executes immediately. 
D)executes after a delay of one scan.

Quizplus · Accepted Answer

According to the IREF shown, the pushbutton is connected to the input card and the output card through the contact of the PLC. When the pushbutton is momentarily actuated, the contact of the PLC closes for one scan, which latches the data in the input card, and then sends the data to the output card for one scan. Therefore, the data is latched in for one scan.

With Reference to IREF Shown, If the Pushbutton Is Momentarily