User Manual of EM730 Series Inverter inputted from the digital input terminal. When the count reaches the specific value, the there will be the corresponding valid signal output. The user can use this signal for programming (e.g. DI/VX input as the stop command) or view the real-time count by F18.33. Fig. 7-42 Block Diagram of Counting Function Counting principle: Specific information is entered in the pulse form. The number n of pulses is collected by the DI terminal and then is compared with the “specified count” 1 n . If 1 n n , it means that the value does not reach the “specified count”.
Otherwise, it means that the value reaches the “specified count”, the result is outputted by the DO terminal, counting is continued, and the value is compared with the “set count” 2 n . If 2 n n , it means that the value does not reach the “set count”. Otherwise, it means that the value reaches the “set count”, the result will be outputted by the DO terminal and counting will be stopped. The “36: clear counter” input can be used to clear the count and reset the output signal. When the pulse frequency exceeds 250Hz (=1/(2 (default filtering times)*2*1ms -1 )), make sure of the input through the high-speed pulse input terminal (X5), and set F02.06 to “35: high-speed count input”.
250Hz is only a theoretical value. The actual effect will prevail. In order to avoid errors, use the high-speed pulse input terminal wherever possible. 306