The output of a PLC counter is energized when the:
A. accumulated count equals the preset count.
B. preset count is greater than the accumulated count.
C. counter input rung is true.
D. counter input rung is false.
Answer: A
Share your understanding of this question with the correct explanation.aut
Explanation:
The output of a PLC counter is energized when the accumulated count equals the preset count.
PLC (Programmable Logic Controller) counters are used to count events, pulses, or transitions based on the program logic and input signals. They have an accumulated count and a preset count, and their output status depends on the relationship between these two counts.
Here’s a breakdown of the options and why option A is the correct answer:
A) Accumulated count equals the preset count: When the accumulated count in the counter reaches the preset count value, the counter’s output becomes energized. This means that the counter has counted the desired number of events or transitions and has reached the target count.
B) Preset count is greater than the accumulated count: This option is not correct. If the preset count is greater than the accumulated count, the counter’s output will not be energized until the accumulated count reaches the preset count.
C) Counter input rung is true: The counter’s output is not directly related to the input rung status. The counter’s output is determined by the relationship between the accumulated count and the preset count, not by the status of the input rung.
D) Counter input rung is false: Similar to option C, the counter’s output is not directly related to the status of the input rung. The input rung status affects the counting operation, but the output is based on the accumulated count reaching the preset count.
In summary, the output of a PLC counter becomes energized when the accumulated count equals the preset count, indicating that the counter has reached the desired count value.