| 摘要 |
PURPOSE:To surely perform decision for 'off' input and to prevent the maximum counting speed from being lowered by setting the sampling number of times of 'off' decision less than that of 'on' decision. CONSTITUTION:In a decision method of input of a self power source counter in which the 'on' and 'off' states of no voltage output connected to the external input terminals 1a and 1b of a self power source counter are detected by applying a sampling signal of prescribed cycle, and also, the input when the same state continues for plural times successively is decided as effective, the sampling number of times of 'off' decision when a photocoupler PC is connected as the no voltage input is set less than that of 'on' decision. Thereby, the judgement for the 'off' input can be surely performed even when the load current of the photocoupler PC is decreased, and the maximum counting speed can be prevented from being lowered. |
