| 摘要 |
PURPOSE:To eliminate the need for correcting calculation by means of count-up by providing a differential calculation circuit corresponding to each measuring amount and adding the results of calculations so as to transfer the sum to a master station. CONSTITUTION:A primary integration value of a pulse measuring signal transmitted from a slave station is received by a serial/parallel converting circuit 1 and a buffer circuit 2 and a differential calculation circuit 3 calculates the signals differentially so as to obtain the number of pulses at each transmission cycle. This calculation is attained at each measuring amount and the result is inputted to a counter 5, where the signals are added and the result is transmitted to a master station. The master station applies differential calculation to this data at each transmission cycle so as to obtain a pulse measuring signal. An output of the pulse measuring signal from the differential calculation circuit 3 is locked when an output of a flip-flop 6 is set so as to prevent generation of excessive error. The flip-flop 6 is reset by a calculation end signal from the difference calculation circuit 3 and the normal operation is attained from the next transmission cycle. |
