Parameter functions: Set the time constant for high-frequency filtering of external SIGN command input When the pulse setting position command is used, error may occur to the count of pulses received by the servo driver due to high-frequency disturbance resulted from various factors. Properly setting this parameter can avoid high-frequency disturbance. If the time constant for pulse input filtering is T f , and the minimum width of input signal is T min , then the input signal and the signal after filtering are shown in the following figure. Compared with the input signal, the signal after filtering is delayed for T f . The time constant for pulse input filtering T f shall meet:
T f ≤(20%~25%) Tmin If the maximum frequency of the input pulse signal (or minimum pulse width) is known, the recommended filtering time parameter is shown in the following table: 117 Technical Manual for EA190 Series Servo Driver V100 Caution☞ 1: The value set by P1-30 is the count of command pulses. 2: If after the rising edge of terminal PUL-UP/PUL-DN is triggered for execution and the time set by P1-31 has not be reached, or the time set by P1-31 is reached but increased/decreased pulses cannot be executed by any other reason, then the new rising edge of terminal PUL-UP/PUL-DN will not be responded. 3:
Please set a proper count of deviation pulses and execution time; an excessively large count of pulses in combination with too short execution time may result in mechanical collision. P1-32 Filtering time of external SIGN signal Initial value 9 Communication address 0120H Unit - Time of taking effect With immediate effect Setting range 1~65535 Data size 16bit Control mode P S Maximum input pulse frequency Recommended P1-15 parameter Actual filtering time 16 640ns 167K~250K 12 480ns 250K~500K 9 360ns