The slave unit is located at the ground stations . 附属装置安装在地面台。
2.
One master unit circular check the status of one or several slave unit 一个主单元轮流去询问各个从属单元的状态。
3.
Displays all the installed biumd units . note that the unit addresses are needed when the slave unit settings are given 显示所有被安装的biumd单元。注意这个单元的地址是必须的当这些服务单元被设定时。