Читать книгу Automation of Water Resource Recovery Facilities - Water Environment Federation - Страница 118

After each control loop has been tested, the construction management team should test the entire control system, including signals to and from controlled field equipment (e.g., motors, sensors, transmitters, valves, and VSDs). Before the test begins, the system integrator should write up the entire test procedure and submit it to the design engineer for approval. It should include a list of items to be checked, such as a database listing grouped by I/O for each area of the WRRF. The database listing should include all wired I/O points, virtual (nonphysical) points, and derived points. Sorting the database I/O listing by process area helps make system checking easier.

During the integrated systems test, the control system must operate for a specified period of time without failures. If the factory acceptance test was well executed and all control system equipment from the factory was tested properly, then the integrated systems test should only be limited by field wiring issues.

The integrated system test should be overseen and approved by both the engineer and the owner. A log of all testing activities, with the initials of the system integrator, engineer, and owner next to each functioning item, should be kept as test records. The integrated system test is also referred to as SIT (ISA, 2011).