Current control of proportional valve

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There is currently a 3-position 4-way proportional valve to control the hydraulic circuit, with a Wanfu Road SD6 controller installed in the control cabinet. I took a look at the working principle of the proportional valve: by controlling the current flowing through the coil, it is possible to adjust the position of the sliding rod inside the valve, thereby controlling the flow rate of hydraulic fluid. It was always assumed that the current flowing through the solenoid of the proportional valve was a constant signal (either always on or always off), but in fact, looking at the parameter settings of the SD6 (as shown in the screenshot), there seems to be a dither signal (a high-frequency pulse oscillation signal, which is likely the PWM signal) whose frequency and current are used to control the current supplied to the solenoid. The question is whether loading a dither signal (PWM) signal is equivalent to loading a constant current signal ? ? What are the advantages or disadvantages? I hope those who are experts in hydraulic proportional valves can explain this. Thank you! ! ! I’ve also attached some documents downloaded from the internet for everyone to study together*.