The state field of the telematic message, as shown on the Telematics Raw Data page, represents the technical status of the locomotive (moving, not moving, power on or power off) and is calculated in real time by the Railster (the remote condition monitoring device installed on your asset):
There are 4 state values (1,2,3 and 4) defined as follows:
To calculate the state, the Railster needs a GPS signal and has to be correctly connected to the power supply of the locomotive.
The Moving / Not Moving dimension is determined based on the GPS speed, by an algorithm able to filter the noise of the GPS signal and detect state changes.
When the Railster is not able to pick up a GPS signal (for example, inside a workshop), the value of the state field defaults to 2 or 4 (Not Moving), depending on the power supply as detected by the Railster.
The Power On / Power Off dimension represents the power supply as detected by the Railster. When the locomotive is powered and the Railster is connected correctly, the state indicates Power On. When the locomotive is not moving and unpowered, the state indicates Power Off and the Railster runs on its internal battery to send telematic messages according to its wake-up and message transmission profile.
The engine of a diesel locomotive may or may not be started when the locomotive is powered. The "Idle or Standby" state (idling engine) is therefore a sub-status of state 4.
Please note that the Data Inspector and the Operational (beta) dashboard only display the 4 main states (Vehicle, Parking, Traction and Power On), the sub-status Standby is not displayed. Data Inspector does allow you to display a locomotive's rpm in addition to its state however, allowing you to distinguish between a Power On (rpm = 0) and a Standby state (rpm > 0):