Question:
In classical control terminology, reset rate is typically measured in?
Options:
A) Seconds
B) Cycles/min
C) %/%
D) Hz only
View Answer
Correct Answer: B) Cycles/min
Detailed Explanation
In classical (pneumatic and early analog) controller terminology, reset rate refers to the strength of integral action and is expressed as:
Repeats per minute (or cycles per minute)
It represents how many times per minute the proportional action is repeated due to integral action.
There are two equivalent ways to express integral action:
- Integral time (Ti) → Measured in seconds
- Reset rate → Measured in repeats per minute
They are inversely related:
Practical Meaning
Higher reset rate:
- Stronger integral action
- Faster offset removal
- Greater oscillation risk
Lower reset rate:
- Slower correction
- More stable response
Why Other Options Are Incorrect
A) Seconds → That represents integral time (Ti), not reset rate.
C) %/% → This relates to proportional gain units.
D) Hz only → Not used in classical reset terminology.