The iB003N can transmit up to three channels: iBeacon, Custom and Accelerometer Data. If you only want to send iBeacon, the iOS and Android app ‘Config’ screen implicitly sets the state to iBeacon only transmission when you set the iBeacon parameters.
On iOS only, the Eddystone screen allows you to set the custom channel to send Eddystone that implicitly sets the state to transmit the Custom channel only.
What if you want to transmit both iBeacon and Custom channels or also send the acceleration data? What if you want to enable motion triggered broadcasting? For cases such as these, you have to set the beacon state explicitly (manually) via the Bluetooth Service Characteristic 0x2A80 as described in the iB003N user guide .
Sleepy bit rot on Twitter has produced a useful table showing what values have to be set for some specific configurations: