| 摘要 |
<p>A process controller (1) includes an input interface (2) for reception of data. The interface (2) may be a serial port for receiving signals from sensors such as temperature sensors. Alternatively, it may simply be a keypad. A data monitor (4), a data verifier (5) and a relational record update circuit (7) ensure that all data whether relational or independent is automatically verified in an efficient manner to prevent writing of incorrect data to records (11) and (12). These records form the basis for the generation of output signals which may be time driven to initiate events for process control. Verifier 5 compares non-relational input data in buffer (9) against reference values from a file (6), and also checks at (10) whether complete sets of data have been entered. <IMAGE></p> |
