Electrical EngineeringProgrammable Logic Controller Lab →List Of Experiments

Develop an application using Up-Down Counter

1. In up counter instruction the accumulated value will increase only when
a) There is complete transition from low to high
b) There is complete transition from high to low
c) Can’t Say

2) In down counter instruction the accumulated value will decrease only when
a) There is complete transition from low to high
b) There is complete transition from high to low
c) Can’t Say

3) The duration of input transition pulse is the deciding factor for counting the pulse in case of counters
a) True
b) False
c) Not always false

4) The done bit of counter changes state when
a) the accumulated value reaches the preset value
b) The overflow bit is set
c) The accumulated value reaches to overflow value

5) In case of CTU the done bit status is ---- when the accumulated and preset values are equal
a) Close
b) Low
c) High