Beckhoff AX2006 servo drive

hello,

i am new to this beckhoff servo product. currently, i have a job which need to configure this servo drive ax2006 whenever the motor is running then an auxiliary output can give a high level signal. after briefly read through the help file and manual. i decided to set this parameter under 02mode=2 v_act>02 trig. but after i save this to the servo drive. the auxiliary output at digital-out2 always give a high-level not matter the motor is running or not. here by, i do hope anyone can solve my doubt about this. thank you