Hi ychen488,
To test JP5 functionality:
#1 Disconnect everything from KFLOP except USB and +5V
#2 cycle power on KFLOP for all default configuration
#3 Use Kmotion.exe Digital I/O Screen
#4 Select I/O 36 as Output
#5 Toggle I/O 36 state on and off
#6 Measure voltage levels on JP5 Pin 1 with Voltmeter relative to KFLOP GND
#7 Repeat for other 7 I/O
Regards