True or False: To better understand abnormal operation, it is essential to first understand normal operation.

• A. True
• B. False
• C. Not Sure
• D. Not Applicable

Answer: (A)

Understanding how a system normally operates provides the baseline for recognizing abnormal operation. In motor control, normal operation describes the expected sequence of events, timing, voltages, current levels, and sensor feedback, along with how protection and interlocks should behave. When something goes off, you compare what you observe to that baseline to identify deviations, determine whether a sensor reading is out of range, whether a drive is in a fault state, or if a sequence is being executed incorrectly. This baseline also helps you separate legitimate transients from actual faults and guides effective debugging and safer troubleshooting. Describing the idea as not needing normal operation would misrepresent how diagnostics are typically approached, and options that imply uncertainty or inapplicability don’t fit this clear diagnostic principle.