Motor beeping when disarmed for a long time with ArduCopter

Hello everyone, I’m using CUAV V5+ hardware and ArduCopter 4.5.7 for my quadrotors. When I power the quadrotor, if I keep it disarmed for a long period of time (about 10 minutes or so), my moters will beep continuously until I arm the quadrotor. I wonder how I should turn this feature off.
I guess the problem is caused by Ardupilot but not the ESC , because when I reboot the ArduCopter, moters will stop beeping.
My params of Ardupilot is attacted. Thanks for your helps!
debug.param (18.1 KB)

it’s a setting in your ESCs, when the input signal doesn’t change for a long time it makes the lost model beep to help you find it in case it’s been crashed somewhere. You can disable it using BLHELI configurator if your using blheli escs.

Okay, I understand. I will check my ESC config. Thank you for your help!