Electrical EngineeringProgrammable Logic Controller Lab →List Of Experiments

Implementation of Logic Gates

1. The scan time of PLC depends upon
a) Processor speed and program length
b) I/O density
c) Both the above

2) The programming device must be connected to the controller
a) At all times
b) When entering the program
c) When program is running

3) The ----- will account for the most of the total memory of a given PLC program
a) User program
b) Output image table
c) Input image table

4) While developing the ladder program the contacts are in
a) Any state (either energised or de-enrgised)
b) Energised state
c) De-energised state

5) Which of the following is not a factor in determining the total scan time of a PLC
a) Total no. of inputs and outputs
b) Programming method
c) Program length