| 摘要 |
PURPOSE:To prevent particular pumps from a burden by determining operating time of each pump on the basis of integrated value of the operating time to unify the operating time and number of times of starting. CONSTITUTION:In step 30 is supplied the input of integrated operating time value of each circulating pump. In step 31 is judged whether or not said values of the respective pump are all equal, and in step 32 is determined initial operation sequence when said values are all equal. If said values are not equal, the operating sequence is determined in step 33 on the basis of integrated operating time values of said pumps. In step 34 is made advance to step 35 if water level reaches operating one. In step 35 is read the number of operating pumps to send the operating signal outputs of pumps to a pump controller. In step 38 is judged whether or not some pumps should be stopped. In step 39 is reset the operating signal of pump which is cleared after count value of an operating time timer is stored. Further in step 40 is renewed integrated operating time value memory and judged whether or not all pumps should be stopped to repeat the above- mentioned operations. |
