DVP-15MC Series Motion Controller Operation Manual 6.2 Input Point and Output Point Wiring 6.2.1 Function that Input Points Support There are 16 input points which support external interrupt and filter functions in the motion controller. In addition, the input points can be used to capture the encoder position. Refer to the explanation of the DMC_TouchProbe instruction for details on position capture. The work principle of the input filter The input filter filters short pulse signals via the 16 I points I0~I7 and I10~I17 to reduce the influence of the input interference signals.
Increasing the filter value can decrease the vibration of input signals or the influence from external interference. Input filter time: t=31us * （ 0~255 ） . So the filter time is a multiple of 31us and 0 is the default value. The input filter time can be set through the software. When there is the set filter: When the filter time is set to t (us), the signal is valid if the ON or OFF time of the input signal is greater than t (us). If the ON or OFF time of input signal is less than t (us), the signal will be eliminated. The input signal left after being filtered will be input after being delayed by t (us).
Input signals t(us) Input signal s after being filte d re Figure 6.2.1.1 When there is no filter set: The input signals have no change when no filter time is set. _6 Input Input Figure 6.2.1.2 6-6 t(us) signals ut filter set