| 摘要 |
PURPOSE:To simplify the configuration of a pumping control system by using only a pressure signal and a rate-of-flow signal as analog input and solely a speed signal as analog output and thereby providing possiblility of treatment of all signals by the software in a sequencer. CONSTITUTION:A sequencer 19 is directly fed with digital signals such as contact input signals from switches, buttons, etc. and a signal from the electrode 15 as well as analog signals from a pressure signal transmitter 7 and a rate-of-flow transducer 9, and carries out conversion of analog signals into digital signals to treat all signals there in the form of digital signal. Thus there are only pressure signal and rate-of-flow signal as analog input and solely speed signal as analog output, and all signals can be treated by the software in the sequencer 19, so that analog instruments used here are only the pressure signal transmitter 7 and rate-of-flow transducer 9, that will assure a simplifield configuration for the system. |
