Exam 14: Control Logix Counter Instructions

Because counters are retentive, a reset (RES) instruction is used with count up counters to reset the accumulated value back to ____________________.

To keep an accumulated tally of the number of times some predetermined event transpires, the appropriate instruction is the ____________________ instruction.

Briefly describe the three-DINT structure of a ControlLogix counter.

When the accumulated value and the preset value are equal in the count up instruction, the ____________________ status bit is set.

One important consideration when working with counters is the speed or frequency with which an input device is sending the false-to-true signals to the controller.

The count up counter increments each time the ____________________ changes from false to true

When using RSView ME software, the development software for the PanelView Plus operator interface, what is meant by direct tags?

What happens to the accumulated value of the counter if the controller loses power?

When using the CTD counter, the reset instruction is typically used to put a 0 into the accumulated value when resetting the counter.

The count up counter counts from 0 up to a predetermined value, called the accumulated value.

Count up counters have three status bits: enable, done, and underflow.

List the seven components of an RSLogix counter instruction.

It is possible for a counter to continue to count past the preset value.

Briefly describe how overflowing or underflowing is avoided in counters.

The key to having a separate count up instruction and a separate count down instruction working together to create a counter that counts in both directions is that both counters share the same ____________________.