step1: Set P0-16 = 0
step2: Calculate the number of pulses required for one revolution of the load （A）
for example
PLC send 10000 pulse to servo
Require load move 100mm
The moving distance of the load in one rotation：300mm
Then we get A=10000*(300/100)= 30000 pulse/r for load
step3: Determine the encoder resolution （B）
for 2500-line encoder B is 2500
for 17-bit encoder B is 131072
for 23-bit encoder B is 8388608
step4: Determine the reduction ratio （C）
step5: Electronic gear ratio = B/(A*C)
set P0-17(electronic gear molecule) = B
set P0-18(electronic gear denominator) = A*C
Note:
Electronic gear ratio range limit:
2500-line incremental encoder: 0.01~100
17-bit encoder: 0.001~500
23-bit encoder: 0.001~3200