How do you perform a 'point-to-point' check during site acceptance testing?

How do you perform a 'point-to-point' check during site acceptance testing?

• A. Verify that each point tag corresponds to actual hardware, check read and write operations, calibrate sensors, and confirm data is accurately recorded
• B. Confirm the project name matches the documentation
• C. Verify only the write operations are functioning for all points
• D. Ensure network topology matches the design

Answer: (A)

Point-to-point checks in site acceptance testing focus on validating the end-to-end path for every I/O point. The best approach is to verify that each point tag maps to the actual hardware, exercise both reading and writing to that point, calibrate sensors so their values reflect real-world measurements within tolerance, and confirm that the data is recorded accurately in the historian or data store. This ensures the field device, its wiring, the control system, and the data logs are all in alignment, so signals can be trusted and traced from the physical device through to the system records. Verifying only bureaucratic details like the project name doesn’t check the functional wiring or data integrity. Testing only write operations misses the necessity of confirming reads back the expected values, which is essential to prove the control loop and monitoring are working. Checking network topology alone focuses on the network design rather than the correctness of each point’s wiring, configuration, and data logging.

Point-to-point checks in site acceptance testing focus on validating the end-to-end path for every I/O point. The best approach is to verify that each point tag maps to the actual hardware, exercise both reading and writing to that point, calibrate sensors so their values reflect real-world measurements within tolerance, and confirm that the data is recorded accurately in the historian or data store. This ensures the field device, its wiring, the control system, and the data logs are all in alignment, so signals can be trusted and traced from the physical device through to the system records.

Verifying only bureaucratic details like the project name doesn’t check the functional wiring or data integrity. Testing only write operations misses the necessity of confirming reads back the expected values, which is essential to prove the control loop and monitoring are working. Checking network topology alone focuses on the network design rather than the correctness of each point’s wiring, configuration, and data logging.