METHOD OF OUTPUTTING POSITIONING PULSE BY PLC

摘要

A method of outputting a positioning pulse by a programmable logic controller (PLC) is provided. The method includes setting up the desired cycle of a pulse to be output; determining a number of needed clocks based on a number of system clocks and a desired frequency according to the desired cycle; determining a total number of needed clocks based on the number of needed clocks and the desired frequency; determining a clock difference based on the number of system clocks and the total number of needed clocks; determining a first number of setup clocks corresponding to a first output pulse in a certain cycle; determining a second number of setup clocks corresponding to pulses except for the first output pulse; and outputting a pulse based on the first number of setup clocks and the second number of setup clocks.

主权项

1. A method of outputting a positioning pulse by a programmable logic controller (PLC), the method comprising:
setting up the desired cycle of a pulse to be output; determining a number of needed clocks based on a number of system clocks and a desired frequency according to the desired cycle; determining a total number of needed clocks based on the number of needed clocks and the desired frequency; determining a clock difference based on the number of system clocks and the total number of needed clocks; determining a first number of setup clocks corresponding to a first output pulse in a certain cycle; determining a second number of setup clocks corresponding to pulses except for the first output pulse; and outputting a pulse based on the first number of setup clocks and the second number of setup clocks.