1. For high-speed pulse output, it is designed for external high-speed devices. To count the pulses, only a high-speed pulse input counter can be used, and internal counters or Y edge changes cannot be used for counting. When used as a high-speed output, it cannot be used as a regular output port;

2. The OFF time of transistors has the characteristic of being prolonged under light loads. So, when responsiveness is required, please design a load resistor to increase the load current when the load is lighter;

3. For pulse output Y0, the number of pulses is accumulated in register D8140 (D8141), where D8141 stores the high 16 bits and D8140 stores the low 16 bits;

4. The pulse accumulation count registers (D8140~D8158) are important registers that can be read and written. When a new value is written, the count will be added or subtracted based on the new value;

5. Due to the directional pulse output of this instruction, the pulse accumulation count registers (D8140~D8158) count according to the direction;

6. When outputting high-speed pulses, the values in the pulse accumulation count registers (D8140~D8158) are discontinuous and constantly changing. When used for judgment, please use size comparison instead of equal judgment;

7. When the pulse command is used to output port Y, the Y port cannot be used for other purposes, that is, ordinary commands cannot perform ON or OFF operations on the Y port anymore.

8. If the frequency of multiple pulse exceeds 200K, a pull-up resistor needs to be added to the pulse output port to ensure that the pulse waveform is not distorted. The pull-up voltage is 24V, and the recommended pull-up resistor is 1K.