UPS Monitor on RB150 possible or not?

Is it possible to get UPS Monitor via Serial Console port on RB 150
Then I try to Install UPS on my RB150 i always get next error :

02:31:11 ups,error cannot acquire port

Any Idea?

AnyOne ?

Disable console (/system console)
Change serial port baud rate to 2400bps (ROS V3 required)
Add UPS (/system ups)
Change setup key from any to delete (/system routeboard settings set enter-setup-on=delete-key) (Without change rb can’t boot when UPS connected)

Disable console (/system console)
Thx
This really help me.