No, the pulse rate setting is not a percentage (%). Calculate the setting value with the following formula.
Pulse Rate = Output Frequency ÷ Input Frequency
*Pulse rate setting range: 0.0001 to 2.0000
For example, if the input frequency is 100 Hz and the output frequency is 1 Hz, the pulse rate is 1 Hz/100 Hz = 0.01, so set "D52: Pulse rate" to 0.01.