| 摘要 |
PURPOSE:To make an exact demand monitor possible, by setting the sampling time of an input value electric energy from a process as the start time of a demand monitor cycle to make it possible to monitor the quantity of used power continuously in respect to time. CONSTITUTION:A demand monitor time is set when the demand monitor is first started, and hereafter, the demand monitor time is set while shifting the phase by one sampling cycle T. As the result, demands 1-N are set in the monitor state at a certain moment, and the monitor for each demand is advanced accordance with the elapse of time. Thus, a total resultant value A of the quantity of used power in the demand cycle is monitored for all time zones while shifting the phase by one sampling cycle T. |
