Which of the following HART commands is used to read the process variable from a smart field instrument?
A. PV Read
B. Universal Command 0
C. Loop Current Read
D. None of the above
Answer:B
Which of the following HART commands is used to read the process variable from a smart field instrument?
A. PV Read B. Universal Command 0 C. Loop Current Read D. None of the above
Explanation: Universal Command 0 (UC0) is a HART command used to read the process variable from a HART-enabled field instrument. It is one of the most commonly used HART commands.