To control output current using external voltage, press the CONFIG key and set CF10 to ON (CC control using an external voltage).
The external voltage can be chosen from 0 to 5 V or 0 to 10 V. Set CF12 to LOW (0 to 5 V) or HIGH (0 to 10 V).
The factory default setting is LOW (0 to 5 V).
After configuring the above settings, apply an external control voltage between pins 11 and 15 of the J1 connector.
For the details, read the user’s manual – chapter of External Control – Output Current Control.